Matronics Email Lists :: View topic - Help! 3300 rough running puzzle.

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Help! 3300 rough running puzzle.
Goto page 1, 2, 3 Next

Matronics Email Lists Forum Index -> JabiruEngine-List

View previous topic :: View next topic

Author Message

jd(at)lawsonimaging.ca
Guest

Posted: Mon Jun 06, 2011 3:34 pm Post subject: Help! 3300 rough running puzzle.

Greetings Jabiru community...



I'm having a puzzling issue with my 3300 (early hyd. lifters, Aerocarb, 100 hrs.) that I'm 

hoping

someone on this list will be able to help me with. I'll try to touch on the pertinent facts:



- recently completed a 100 hour inspection. Engine was fine last fall when last flying.

- new plugs, standard NGK plugs, anti-seize. All 12 plugs that came out were essentially 

tan in colour.

- removed distributors and alternator spider to get at flywheel bolts, but never 

disconnected the plug

   wires at the distributors. No sign of anything amiss inside, no dust, rotors look fine.

- Leak-down test (warm engine) good for all cyls, lowest was 72/80.

- during initial ground ops after all was back together, the engine seemed to run rough.

- mag tests showed about 40 rpm rpm when r.h. coil grounded via 'mag' switch, but slightly 

rough running.

- when l.h. coil grounded, *very* rough and stumbly (is that a word?), with about a 100 

rpm drop.

- coil primary and secondary resistance measurements were close to specs.

- after checking all the obvious stuff I could think of (h.t. wire seating, etc.), I 

removed the plugs

   and saw that all were nicely tan with the exception of *both* cyl. #3 plugs, which were 

black and sooty.

- so I replaced those two plugs and taxied the plane, with the mixture aggressively 

leaned, standard procedure  the way my aerocarb is set up.

- monitored the EGT and CHT temps on my E.I.S 6000, saw that cylinder #3's temps were 

right in line

   with all the other cyls. Mag checks similar to before, still rough, *especially rough* 

with l.h. coil grounded.

- removed the two #3 plugs, sure enough, they were black and sooty.

- repeated a leak-down test on all cyls, cyl. #3 was [again] 80/76



So now I'm running out of ideas. What could explain the two sooty plugs? I'm assuming at 

this point these

plugs are related to the rough running, but not sure why one coil would be worse than the 

other.



So now I'm out of ideas, so I'm plumbing the collective Jabiru conscienceless for 

ideas/explanations! I think I've included all the important data points, but please don't 

hesitate to ask for more info, or clarification. I hesitate to fly the plane until I get 

to the bottom of this.



Thanks for listening! Hope someone can help!



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

I xeroxed my watch.  Now I have time to spare.

				--- Steven Wright

zeprep251(at)aol.com
Guest

Posted: Tue Jun 07, 2011 5:01 am Post subject: Help! 3300 rough running puzzle.

J,

 Check the air gap between flywheel and mags,then make certain that no plug wires have been rubbed thru by contact with the flywheel or pinched when the spider was re-installed.  Air intake free of rodent nests?Good hunting!

 G.

    

  

     

  

    

     

  

     

  

    --

Rickey B.

Joined: 22 Mar 2008
Posts: 70

Posted: Tue Jun 07, 2011 5:22 am Post subject: Help! 3300 rough running puzzle.

J., you might want to replace the plug wire for that particular cylinder. Cheap elimination.

                R.

 

                Do not archive

 [quote][b]

jd(at)lawsonimaging.ca
Guest

Posted: Tue Jun 07, 2011 10:22 am Post subject: Help! 3300 rough running puzzle.

On 06/07/2011 08:59 AM, zeprep251(at)aol.com wrote:

 	  Quote: 	
		   J,

 Check the air gap between flywheel and mags


	


Yeah, forgot to state it explicitely, but of course I set the air gaps when I re-installed 

the spider.Also

magic markered the magnets to witness any potential future contact.



 	  Quote: 	
		   ,then make certain that no plug wires have been rubbed thru by contact with the flywheel 

 or pinched when the spider was re-installed.


	


It would be pretty hard for the plug wires to get into contact with the flywheel or 

pinched by the spider, they're quite

far removed by the length of the distributor and cap! Regardless, all plug wires were 

thoroughly checked.



 	  Quote: 	
		     Air intake free of rodent nests?Good hunting!


	


Just have a newly cleaned and oiled K&N filter on the aerocarb, no other air intake, as such.



Thanks, anyway!



[quote] G.





 --

jd(at)lawsonimaging.ca
Guest

Posted: Tue Jun 07, 2011 10:28 am Post subject: Help! 3300 rough running puzzle.

On 06/07/2011 09:19 AM, Beckman, Rick wrote:

 	  Quote: 	
		   -->



 J., you might want to replace the plug wire for that particular cylinder. Cheap elimination.

OK, this is weird. I swapped number three's plug wires for number four's, just for the 
	


heck of it.

Replaced the two sooty #3 cyl. plugs and went taxing. It felt smoother immediately, and 

when I did the mag tests,

both sides acted normally, with a 10-20 rpm drop and no rough running!



Got back and pulled #3 plugs... black and sooty again. #4 plugs just fine.



So what just happened???



Obviously, the #3 plug wires weren’t bad (and why should they have been), they are now 

firing the #4 cylinder just fine.



The stumbling and rough running disappeared. Why?



The two #3 plugs are still getting black and sooty, EGT and CHT temps for #3 still fine.

 	  Quote: 	
		   R.



 Do not archive



 *

 *


	




-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

I washed a sock.  Then I put it in the dryer.  When I took

it out, it was gone.

				--- Steven Wright

jd(at)lawsonimaging.ca
Guest

Posted: Tue Jun 07, 2011 1:36 pm Post subject: Help! 3300 rough running puzzle.

On 06/07/2011 04:45 PM, Martin Hone wrote:

 	  Quote: 	
		   J, maybe these plugs have always been black and sooty and it is a parculiarity of your 

 induction system.



 mh1



Hmmm, maybe, but I think I would have noticed at plug change time. I always put all the 
	


plugs I remove into a

labeled plug holder board I fabricated and examine them for differences.  Also, I can't 

imagine that the 3300 intake manifold

could be so selective that one particular cylinder's plugs are sooty/black while all other 

cylinders have light tan plugs!



I wonder if it's just a matter of time before those two plugs actually foul, and the 

rough, stumbling mag checks come back.

.. except that that theory is repudiated by the first time I replaced those two sooty 

plugs with new plugs

and the rough running was there *instantly*.



So the question stands. What could cause either:



- a single cylinder of six to run so rich as to actually foul *both* plugs



or



- the two plugs of the single cylinder not to fire sufficiently to burn off the charge



..keeping in mind the trouble-shooting items I have already eliminated...



Thanks for the input!



 	  Quote: 	
		   On Wed, Jun 8, 2011 at 4:26 AM, j. davis <jd(at)lawsonimaging.ca 

 <mailto:jd(at)lawsonimaging.ca>> wrote:



     

     <mailto:jd(at)lawsonimaging.ca>>



     On 06/07/2011 09:19 AM, Beckman, Rick wrote:



         -->



         J., you might want to replace the plug wire for that particular cylinder. Cheap

         elimination.

     OK, this is weird. I swapped number three's plug wires for number four's, just for

     the heck of it.

     Replaced the two sooty #3 cyl. plugs and went taxing. It felt smoother immediately,

     and when I did the mag tests,

     both sides acted normally, with a 10-20 rpm drop and no rough running!



     Got back and pulled #3 plugs... black and sooty again. #4 plugs just fine.



     So what just happened???



     Obviously, the #3 plug wires werenâ€™t bad (and why should they have been), they are

     now firing the #4 cylinder just fine.



     The stumbling and rough running disappeared. Why?



     The two #3 plugs are still getting black and sooty, EGT and CHT temps for #3 still fine.

         R.



         Do not archive



         *

         *



     -- 

     Regards,  J.



     - Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

     - former C-IGGY CH701 owner/builder, CH750 in progress

     - see both (and more!) at http://cleco.ca



     +-------------------------------+

     | J. Davis, M.Sc. (comp sci)    |

     | email: jd at lawsonimaging.ca <http://lawsonimaging.ca> |

     | *NIX consulting, SysAdmin     |

     | http://cleco.ca               |

     +-------------------------------+

     I washed a sock.  Then I put it in the dryer.  When I took

     it out, it was gone.

                                    --- Steven Wright

     ===========

     -

     ine-List" target="_blank">http://www.matronics.com/Navigator?JabiruEngine-List

     ===========

     MS -

     k">http://forums.matronics.com

     ===========

     e -

              -Matt Dralle, List Admin.

     t="_blank">http://www.matronics.com/contribution

     ===========





 *

 *


	




-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

The sky is falling...no, I'm tipping over backwards.

				--- Steven Wright

aerobiz1(at)gmail.com
Guest

Posted: Tue Jun 07, 2011 1:56 pm Post subject: Help! 3300 rough running puzzle.

Given that the two plugs are fired by independant ignition sources, it does

suggest mixture.

Weird....

martin

On Wed, Jun 8, 2011 at 7:32 AM, j. davis <jd(at)lawsonimaging.ca> wrote:

[quote] 

 On 06/07/2011 04:45 PM, Martin Hone wrote:

> J, maybe these plugs have always been black and sooty and it is a

> parculiarity of your induction system.

>

> mh1

>

>  Hmmm, maybe, but I think I would have noticed at plug change time. I

 always put all the plugs I remove into a

 labeled plug holder board I fabricated and examine them for differences.

  Also, I can't imagine that the 3300 intake manifold

 could be so selective that one particular cylinder's plugs are sooty/black

 while all other cylinders have light tan plugs!

 I wonder if it's just a matter of time before those two plugs actually

 foul, and the rough, stumbling mag checks come back.

 ... except that that theory is repudiated by the first time I replaced

 those two sooty plugs with new plugs

 and the rough running was there *instantly*.

 So the question stands. What could cause either:

 - a single cylinder of six to run so rich as to actually foul *both* plugs

 or

 - the two plugs of the single cylinder not to fire sufficiently to burn off

 the charge

 ...keeping in mind the trouble-shooting items I have already eliminated..

zeprep251(at)aol.com
Guest

Posted: Tue Jun 07, 2011 3:03 pm Post subject: Help! 3300 rough running puzzle.

J.Also check for broken valve spring,probably not on no.3   G

  

     

  

    

     

  

     

  

    --

jwd3ca(at)gmail.com
Guest

Posted: Tue Jun 07, 2011 5:06 pm Post subject: Help! 3300 rough running puzzle.

?? A broken valve spring would pass a leak-down test?



zeprep251(at)aol.com wrote:



[quote]J.Also check for broken valve spring,probably not on no.3

 G



 

 



 



--

naftalih(at)hotmail.com
Guest

Posted: Wed Jun 08, 2011 12:44 am Post subject: Help! 3300 rough running puzzle.

Looks like intermittent / weak ignition at cylinder #3. Check terminals at caps.

[quote] Subject: Re: Help! 3300 rough running puzzle.

 From: jwd3ca(at)gmail.com

 Date: Tue, 7 Jun 2011 21:02:36 -0400

 To: jabiruengine-list(at)matronics.com

 ?? A broken valve spring would pass a leak-down test?

 zeprep251(at)aol.com wrote:

 >J.Also check for broken valve spring,probably not on no.3

 > G

 >

 > 

 >

 >

 > 

 >

 > 

 >

 >--

zeprep251(at)aol.com
Guest

Posted: Wed Jun 08, 2011 4:05 am Post subject: Help! 3300 rough running puzzle.

J.

 Yes,as would a worn cam lobe.The test pressure closes the valve.Just looking for a condition that would affect mixture on a specific cyl.

    

  

     

  

    

     

  

     

  

    --

jd(at)lawsonimaging.ca
Guest

Posted: Wed Jun 08, 2011 5:00 am Post subject: Help! 3300 rough running puzzle.

On 06/08/2011 08:02 AM, zeprep251(at)aol.com wrote:

 	  Quote: 	
		   J.

 Yes,as would a worn cam lobe.The test pressure closes the valve.


	


OK...

But could an engine run otherwise seemingly fine with a broken valve spring?

How could a broken valve spring on a different cylinder not affect that cylinder yet 

affect #3?

What's the best way to check for a broken valve spring. Remember, I have hydraulic lifters.

Vacuum gauge? Should I be removing all the heads?



Thanks everyone for the feedback!

Wonder what Lynn and Roger and Clive and Pete's opinions are?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

My house is made out of balsa wood, so when I want to

scare the neighborhood kids I lift it over my head and

tell them to get out of my yard or I'll throw it at them.

				--- Steven Wright

dons701

Joined: 22 May 2009
Posts: 80
Location: Hershey, PA

Posted: Wed Jun 08, 2011 5:04 am Post subject: Re: Help! 3300 rough running puzzle.

Have not read of anyone suggesting a vacuum gage. This would show the possible broken valve spring or other strange phenomena. Without any other info I'd say it's time to pull the head of #3, or at least the valve cover......Don B

_________________
Zenith 701 #76120
Jabiru 2200A #2456 95 hours
Sensenich Wood 64-PJ-36 Prop

jd(at)lawsonimaging.ca
Guest

Posted: Wed Jun 08, 2011 6:49 am Post subject: Help! 3300 rough running puzzle.

On 06/08/2011 09:04 AM, dons701 wrote:

 	  Quote: 	
		   



 Have not read of anyone suggesting a vacuum gage. This would show the possible broken valve spring or other strange phenomena. Without any other info I'd say it's time to pull the head of #3, or at least the valve cover......Don B




	


Not sure if there's a place to connect a vacuum gauge (no Bing).



Could my symptoms have to do with hydraulic lifters somehow? Maybe sticking, 'deflated', etc.?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

A cop stopped me for speeding.  He said, "Why were you

going so fast?"  I said, "See this thing my foot is on?

It's called an accelerator.  When you push down on it,

it sends more gas to the engine.  The whole car just takes

right off.  And see this thing?  This steers it."

				--- Steven Wright

IFLYSMODEL(at)aol.com
Guest

Posted: Wed Jun 08, 2011 7:00 am Post subject: Help! 3300 rough running puzzle.

Hey J: I would remove the rocker covers of # 3 and either 1 or 5. Then with  a spark plug out of each cylinder, rotate the engine to check the valve movement  on # 3. Also, when the valves are closed, check to see of the rocker can be  moved (according to the manual it should not). (Don't ask how I know)

 Lynn Nelsen

  

  In a message dated 6/8/2011 10:49:20 A.M. Eastern Daylight Time,  jd(at)lawsonimaging.ca writes:

  	  Quote: 	
		  -->    JabiruEngine-List message posted by: "j. davis"    <jd(at)lawsonimaging.ca>



On 06/08/2011 09:04 AM, dons701    wrote:

 	  Quote: 	
		   -->  JabiruEngine-List message posted by:    "dons701"<burdon1(at)comcast.net>



 Have not read of anyone    suggesting a vacuum gage. This would show the possible broken valve spring or    other strange phenomena. Without any other info I'd say it's time to pull the    head of #3, or at least the valve cover......Don B




	


Not sure if    there's a place to connect a vacuum gauge (no Bing).



Could my symptoms    have to do with hydraulic lifters somehow? Maybe sticking, 'deflated',    etc.?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a,    Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in    progress

- see both (and more!) at    http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc.    (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX    consulting, SysAdmin     |

| http://cleco.ca                     |

+-------------------------------+

A cop stopped me for    speeding.  He said, "Why were you

going so fast?"  I said, "See    this thing my foot is on?

It's called an accelerator.  When you push    down on it,

it sends more gas to the engine.  The whole car just    takes

right off.  And see this thing?  This steers it."

                   --- Steven  ========================  = Use   utilities  Day  ================================================               - MATRONICS WEB FORUMS  ================================================             - List Contribution Web Site  sp;                             ===================================================



	


  [quote][b]

zeprep251(at)aol.com
Guest

Posted: Wed Jun 08, 2011 9:24 am Post subject: Help! 3300 rough running puzzle.

I would just pull the covers and visually inspect the springs.They are difficult to twist if they are in one piece.     

  

    

     

  

     

  

    --

Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Wed Jun 08, 2011 12:13 pm Post subject: Help! 3300 rough running puzzle.

You should be able to  rattle a tappet when the valve is closed, it rattles by the clearance you create  when you put the feeler in to set the tappet clearance? Or am I missing  something?

 CJ



   From:  owner-jabiruengine-list-server(at)matronics.com  [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of  IFLYSMODEL(at)aol.com

Sent: 08 June 2011 15:57

To:  jabiruengine-list(at)matronics.com

Subject: Re: Re:  Help! 3300 rough running puzzle.

 

 Hey J: I would remove the rocker covers of # 3 and either 1 or 5. Then with  a spark plug out of each cylinder, rotate the engine to check the valve movement  on # 3. Also, when the valves are closed, check to see of the rocker can be  moved (according to the manual it should not). (Don't ask how I know)

 Lynn Nelsen

  

  In a message dated 6/8/2011 10:49:20 A.M. Eastern Daylight Time,  jd(at)lawsonimaging.ca writes:

  	  Quote: 	
		  -->    JabiruEngine-List message posted by: "j. davis"    <jd(at)lawsonimaging.ca>



On 06/08/2011 09:04 AM, dons701    wrote:

 	  Quote: 	
		   -->  JabiruEngine-List message posted by:    "dons701"<burdon1(at)comcast.net>



 Have not read of anyone    suggesting a vacuum gage. This would show the possible broken valve spring or    other strange phenomena. Without any other info I'd say it's time to pull the    head of #3, or at least the valve cover......Don B




	


Not sure if    there's a place to connect a vacuum gauge (no Bing).



Could my symptoms    have to do with hydraulic lifters somehow? Maybe sticking, 'deflated',    etc.?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a,    Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in    progress

- see both (and more!) at    http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc.    (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX    consulting, SysAdmin     |

| http://cleco.ca                     |

+-------------------------------+

A cop stopped me for    speeding.  He said, "Why were you

going so fast?"  I said, "See    this thing my foot is on?

It's called an accelerator.  When you push    down on it,

it sends more gas to the engine.  The whole car just    takes

right off.  And see this thing?  This steers it."

                   --- Steven    ======================== = Use utilities Day    =======================                 - MATRONICS WEB FORUMS    =======================               - List Contribution Web Site sp;                               =



	


[quote]



href="http://www.matronics.com/Navigator?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Wed Jun 08, 2011 12:17 pm Post subject: Help! 3300 rough running puzzle.

I have been musing the sooty plugs on this engine. Is it  possibly an extreme case of the mismatch out the fuel flows to the cylinders  because the poor dynamics of the induction pipes?

  

 How about the carb twisting idea?

 The cross piece in the carb inlet? 

 Drop the needle?

 Lift the needle?

  

 The rest of the ideas all seem a little extreme for something  that looks like a mixture issue.



   From:  owner-jabiruengine-list-server(at)matronics.com  [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of  zeprep251(at)aol.com

Sent: 08 June 2011 18:19

To:  jabiruengine-list(at)matronics.com

Subject: Re: Help!  3300 rough running puzzle.

 

I would just pull the covers and visually inspect the springs.They are  difficult to twist if they are in one piece.  



 

 



 



 -----Original  Message-----

From: j. davis <jd(at)lawsonimaging.ca>

To:  jabiruengine-list <jabiruengine-list(at)matronics.com>

Sent: Wed, Jun 8,  2011 9:00 am

Subject: Re: Help! 3300 rough running  puzzle.



  	  Quote: 	
		  --> JabiruEngine-List message posted by: "j. davis" <jd(at)lawsonimaging.ca (jd(at)lawsonimaging.ca)>



On 06/08/2011 08:02 AM, zeprep251(at)aol.com (zeprep251(at)aol.com) wrote:

 	  Quote: 	
		   J.

 Yes,as would a worn cam lobe.The test pressure closes the valve.


	


OK...

But could an engine run otherwise seemingly fine with a broken valve spring?

How could a broken valve spring on a different cylinder not affect that cylinder 

yet 

affect #3?

What's the best way to check for a broken valve spring. Remember, I have 

hydraulic lifters.

Vacuum gauge? Should I be removing all the heads?



Thanks everyone for the feedback!

Wonder what Lynn and Roger and Clive and Pete's opinions are?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

My house is made out of balsa wood, so when I want to

scare the neighborhood kids I lift it over my head and

tell them to get out of my yard or I'll throw it at them.

				--- Steven Wright

ist" target="_blank">http://www.matronics.com/Navigator?JabiruEngine-List

tp://forums.matronics.com

_blank">http://www.matronics.com/contribution



	




[quote]



href="http://www.matronics.com/Navigator?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

Clive J

Joined: 03 Nov 2007
Posts: 340
Location: UK

Posted: Wed Jun 08, 2011 12:21 pm Post subject: Help! 3300 rough running puzzle.

I missed the hydraulic  tappet comment sorry.

  

 Bleeding things, wish I  didn't have them frankly. I have two flat cylinders which appear to be caused by  the hydraulic pesky tappets.



   From: James, Clive R 

Sent: 08 June  2011 21:10

To: 'jabiruengine-list(at)matronics.com'

Subject:  RE: Re: Help! 3300 rough running puzzle.

 

 You should be able to  rattle a tappet when the valve is closed, it rattles by the clearance you create  when you put the feeler in to set the tappet clearance? Or am I missing  something?

 CJ



   From:  owner-jabiruengine-list-server(at)matronics.com  [mailto:owner-jabiruengine-list-server(at)matronics.com] On Behalf Of  IFLYSMODEL(at)aol.com

Sent: 08 June 2011 15:57

To:  jabiruengine-list(at)matronics.com

Subject: Re: Re:  Help! 3300 rough running puzzle.

 

 Hey J: I would remove the rocker covers of # 3 and either 1 or 5. Then with  a spark plug out of each cylinder, rotate the engine to check the valve movement  on # 3. Also, when the valves are closed, check to see of the rocker can be  moved (according to the manual it should not). (Don't ask how I know)

 Lynn Nelsen

  

  In a message dated 6/8/2011 10:49:20 A.M. Eastern Daylight Time,  jd(at)lawsonimaging.ca writes:

  	  Quote: 	
		  -->    JabiruEngine-List message posted by: "j. davis"    <jd(at)lawsonimaging.ca>



On 06/08/2011 09:04 AM, dons701    wrote:

 	  Quote: 	
		   -->  JabiruEngine-List message posted by:    "dons701"<burdon1(at)comcast.net>



 Have not read of anyone    suggesting a vacuum gage. This would show the possible broken valve spring or    other strange phenomena. Without any other info I'd say it's time to pull the    head of #3, or at least the valve cover......Don B




	


Not sure if    there's a place to connect a vacuum gauge (no Bing).



Could my symptoms    have to do with hydraulic lifters somehow? Maybe sticking, 'deflated',    etc.?



-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a,    Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in    progress

- see both (and more!) at    http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc.    (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX    consulting, SysAdmin     |

| http://cleco.ca                     |

+-------------------------------+

A cop stopped me for    speeding.  He said, "Why were you

going so fast?"  I said, "See    this thing my foot is on?

It's called an accelerator.  When you push    down on it,

it sends more gas to the engine.  The whole car just    takes

right off.  And see this thing?  This steers it."

                   --- Steven    ======================== = Use utilities Day    =======================                 - MATRONICS WEB FORUMS    =======================               - List Contribution Web Site sp;                               =



	


[quote]



href="http://www.matronics.com/Navigator?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/c

[b]

jd(at)lawsonimaging.ca
Guest

Posted: Wed Jun 08, 2011 1:06 pm Post subject: Help! 3300 rough running puzzle.

On 06/08/2011 04:18 PM, James, Clive R wrote:

 	  Quote: 	
		   I missed the hydraulic tappet comment sorry.

 Bleeding things, wish I didn't have them frankly. I have two flat cylinders which appear 

 to be caused by the hydraulic pesky tappets.


	


Thanks for chiming in on this, Clive. Yes, hydraulic lifters. I actually postponed 

purchasing my engine, to wait for the 'A' version, thinking it would be a Good Thing.



Visually inspected all valve springs and tappets, can see nothing amiss.

If I push fairly hard on the bottom (push rod side) of each tappet I can compress the 

lifter slightly, then it returns.



Maybe I'm making a mountain out of a mole hill, esp. since the rough running has 

disappeared. I just can't help thinking that

maybe those two #3 cylinder plugs will foul, then the rough running will be back. And I 

don't want to do anything (like flying) that could do any damage to the engine.



Clive, what do you mean by 'flat'? Bad leak-down numbers?



 	  Quote: 	
		  

 ------------------------------------------------------------------------------------------

 *From:* James, Clive R

 *Sent:* 08 June 2011 21:10

 *To:* 'jabiruengine-list(at)matronics.com'

 *Subject:* RE: Re: Help! 3300 rough running puzzle.



 You should be able to rattle a tappet when the valve is closed, it rattles by the 

 clearance you create when you put the feeler in to set the tappet clearance? Or am I 

 missing something?

 CJ



 ------------------------------------------------------------------------------------------

 *From:* owner-jabiruengine-list-server(at)matronics.com 

 [mailto:owner-jabiruengine-list-server(at)matronics.com] *On Behalf Of *IFLYSMODEL(at)aol.com

 *Sent:* 08 June 2011 15:57

 *To:* jabiruengine-list(at)matronics.com

 *Subject:* Re: Re: Help! 3300 rough running puzzle.



 Hey J: I would remove the rocker covers of # 3 and either 1 or 5. Then with a spark plug 

 out of each cylinder, rotate the engine to check the valve movement on # 3. Also, when 

 the valves are closed, check to see of the rocker can be moved (according to the manual 

 it should not). (Don't ask how I know)

 Lynn Nelsen

 In a message dated 6/8/2011 10:49:20 A.M. Eastern Daylight Time, jd(at)lawsonimaging.ca writes:



     



     On 06/08/2011 09:04 AM, dons701 wrote:

     > 

     >

     > Have not read of anyone suggesting a vacuum gage. This would show the possible

     broken valve spring or other strange phenomena. Without any other info I'd say it's

     time to pull the head of #3, or at least the valve cover......Don B

     >



     Not sure if there's a place to connect a vacuum gauge (no Bing).



     Could my symptoms have to do with hydraulic lifters somehow? Maybe sticking,

     'deflated', etc.?



     -- 

     Regards,  J.



     - Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

     - former C-IGGY CH701 owner/builder, CH750 in progress

     - see both (and more!) at http://cleco.ca



     +-------------------------------+

     | J. Davis, M.Sc. (comp sci)    |

     | email: jd at lawsonimaging.ca |

     | *NIX consulting, SysAdmin     |

     | http://cleco.ca               |

     +-------------------------------+

     A cop stopped me for speeding.  He said, "Why were you

     going so fast?"  I said, "See this thing my foot is on?

     It's called an accelerator.  When you push down on it,

     it sends more gas to the engine.  The whole car just takes

     right off.  And see this thing?  This steers it."

                     --- Steven ======================== = Use utilities Day

     =======================              - MATRONICS WEB FORUMS =======================

                - List Contribution Web Site sp;                         =



 *



 href="http://www.matronics.com/Navigator?JabiruEngine-List">http://www.matronics.com/Navigator?JabiruEngine-List

 href="http://forums.matronics.com">http://forums.matronics.com

 href="http://www.matronics.com/contribution">http://www.matronics.com/c

 *

 *

 *


	




-- 

Regards,  J.



- Sonex #325 C-FJNJ, Jab 3300a, Prince P-Tip, Aerocarb

- former C-IGGY CH701 owner/builder, CH750 in progress

- see both (and more!) at http://cleco.ca



+-------------------------------+

| J. Davis, M.Sc. (comp sci)    |

| email: jd at lawsonimaging.ca |

| *NIX consulting, SysAdmin     |

| http://cleco.ca               |

+-------------------------------+

The other day somebody stole everything in my apartment

and replaced it with an exact replica... When my roommate

came home I said, "Roommate, someone stole everything in

our apartment and replaced it with an exact replica." He

looked at me and said, "Do I know you?"

				--- Steven Wright

Display posts from previous:

	Matronics Email Lists Forum Index -> JabiruEngine-List	All times are GMT - 8 Hours Goto page 1, 2, 3 Next
Page 1 of 3

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum