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broken push rod suberu ea81
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kirkhull(at)sbcglobal.net
Guest

Posted: Thu Jul 13, 2006 2:29 pm Post subject: broken push rod suberu ea81

I had an in flight failure last week of N205AK's Suberu ea81. She was landed

with no problems and everyone is ok.  The push rod on the # 4 cylinder (

Front right)snaped.  Attached is a picture of the part .  it made a clean

break almost dead center on the rod completely in to.  With only 20 hrs on

the engine and only 5 in flight this should not have happened.  Has anyone

else seen this before and why did it happen?  P.S. it is a 100HP Stratus

conversion.

wingsdown(at)comcast.net
Guest

Posted: Thu Jul 13, 2006 5:12 pm Post subject: broken push rod suberu ea81

If it was adjusted to tight, partial bend, stress failure. The are

pretty stout push rods. Did not see the attachment.



Rick



--

Graeme Toft

Joined: 09 Jan 2006
Posts: 123

Posted: Thu Jul 13, 2006 5:18 pm Post subject: broken push rod suberu ea81

Kirk, when my NSI EA 81 was pulled apart after an accident, 2 of the push 

rods were broken at the ball end. The mechanic who did the work for me said 

an engine failure was immanent. Also he was convinced the push rods were 

home made. Im not a mechanical person so Im taking his work for it but he 

did remove all rods and replace them with off the shelf ones. My engine had 

only 130 hours on it and the issues that required repairs or replacement 

would be expected of an engine with far greater hours. Valves seats were 

also clogged with what he suggested was material from the air filter, and 

the bore required honing. Several rings were also imbedded into their 

groves.



Regards

Graeme



---

kirkhull(at)sbcglobal.net
Guest

Posted: Thu Jul 13, 2006 5:26 pm Post subject: broken push rod suberu ea81

sorry I must have forgotten to attach the photo  so here it is





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wingsdown(at)comcast.net
Guest

Posted: Thu Jul 13, 2006 6:38 pm Post subject: broken push rod suberu ea81

Humm, that looks like an aluminum custom type. Is it? The stock ones, at

least on the turbo engine are steal, fat, real beefy. I don't have

experience with the non-turbo, maybe someone else can comment. I would

change to the tougher style, not good. Let me know.



Rick



--

janderson412(at)hotmail.c
Guest

Posted: Thu Jul 13, 2006 8:30 pm Post subject: broken push rod suberu ea81

Yes Rick, mine are are much thinker too and non turbo are the same. It  does look like an after market item. John A.

 

 [quote]   

From:  "wingsdown" <wingsdown(at)comcast.net>

Reply-To:  kitfox-list(at)matronics.com

To:  <kitfox-list(at)matronics.com>

Subject:  RE: broken push rod suberu ea81

Date:  Thu, 13 Jul 2006 19:38:19 -0700

--> Kitfox-List message posted by: "wingsdown" <wingsdown(at)comcast.net>



Humm, that looks like an aluminum custom type. Is it? The stock ones, at

least on the turbo engine are steal, fat, real beefy. I don't have

experience with the non-turbo, maybe someone else can comment. I would

change to the tougher style, not good. Let me know.



Rick



--

kirkhull(at)sbcglobal.net
Guest

Posted: Fri Jul 14, 2006 4:25 am Post subject: broken push rod suberu ea81

These  are not custom parts.  I got the replacement from the auto parts  store.  it looks just like the one that broke.  however they are  aluminum

 [quote]   --

kirkhull(at)sbcglobal.net
Guest

Posted: Fri Jul 14, 2006 4:27 am Post subject: broken push rod suberu ea81

are  you using an NSI and if so would you have a push rod handy to photograph?   Please don't remove one but if you have one just laying around I would really  like to see a pic.

 [quote]   --

kingjohne(at)adelphia.net
Guest

Posted: Fri Jul 14, 2006 10:19 am Post subject: broken push rod suberu ea81

Kirk,

 

 Michael Harter had an NSI EA81 in his Model IV several years back.  On takeoff one time he lost power (not all) throttled back and returned to the airport.  He discovered several (not sure how many) broken push rods.  He replaced then with parts from NSI.

  	  Quote: 	
		  -- 

John King 

Warrenton, VA 	
 

 kirk hull wrote:

  	  Quote: 	
		      	  Quote: 	
		  --> Kitfox-List message posted by: "kirk hull" <kirkhull(at)sbcglobal.net> (kirkhull(at)sbcglobal.net)



I had an in flight failure last week of N205AK's Suberu ea81. She was landed

with no problems and everyone is ok.  The push rod on the # 4 cylinder (

Front right)snaped.  Attached is a picture of the part .  it made a clean

break almost dead center on the rod completely in to.  With only 20 hrs on

the engine and only 5 in flight this should not have happened.  Has anyone

else seen this before and why did it happen?  P.S. it is a 100HP Stratus

conversion.

kirkhull(at)sbcglobal.net
Guest

Posted: Fri Jul 14, 2006 2:59 pm Post subject: broken push rod suberu ea81

thanks  .  I am begining to think that NSI uses their own push rods and not the  stock sub parts.

 [quote]   --

wingsdown(at)comcast.net
Guest

Posted: Fri Jul 14, 2006 4:55 pm Post subject: broken push rod suberu ea81

I will  be out to the airport on the 17th and would be most happy to do that.  

  

 Rick

 [quote]   

   --

wingsdown(at)comcast.net
Guest

Posted: Fri Jul 14, 2006 4:59 pm Post subject: broken push rod suberu ea81

They  used stock I am almost positive, unless it was a special order, don't think so.  This engine doesn't spin fast enough to worry about push rod weight and the HP  savings I think one would be hard pressed to measure.

  

 Rick

 [quote]   

   --

kirkhull(at)sbcglobal.net
Guest

Posted: Fri Jul 14, 2006 6:10 pm Post subject: broken push rod suberu ea81

thanks

 [quote]   --

kirkhull(at)sbcglobal.net
Guest

Posted: Fri Jul 14, 2006 7:03 pm Post subject: broken push rod suberu ea81

I  installed the new pushrod today and checked the clearances on all valves. found  two that were tight.  Still wandering if that could have caused the  problem.  205AK run great again.  put .4 on her today with no problems  but I think that I will pull all of the pushrods at the next inspection and  inspect them just in case.

 [quote]   --

janderson412(at)hotmail.c
Guest

Posted: Fri Jul 14, 2006 9:51 pm Post subject: broken push rod suberu ea81

Was this/these failures with hydraulic or solid lifters. All the original 

turbo engines came out with hyd, any faulures in with these? John A.





Reply-To: kitfox-list(at)matronics.com



Kirk,



Michael Harter had an NSI EA81 in his Model IV several years back.  On 

takeoff one time he lost power (not all) throttled back and returned to the 

airport.  He discovered several (not sure how many) broken push rods.  He 

replaced then with parts from NSI.



--

John King

Warrenton, VA



kirk hull wrote:






I had an in flight failure last week of N205AK's Suberu ea81. She was landed

with no problems and everyone is ok.  The push rod on the # 4 cylinder (

Front right)snaped.  Attached is a picture of the part .  it made a clean

break almost dead center on the rod completely in to.  With only 20 hrs on

the engine and only 5 in flight this should not have happened.  Has anyone

else seen this before and why did it happen?  P.S. it is a 100HP Stratus

conversion.



_________________________________________________________________

Shop ‘til you drop at XtraMSN Shopping http://shopping.xtramsn.co.nz/home/

janderson412(at)hotmail.c
Guest

Posted: Fri Jul 14, 2006 9:52 pm Post subject: broken push rod suberu ea81

If you might post a shot to me too Rick, do the NSI turbos have hyd lifters? 

John

Reply-To: kitfox-list(at)matronics.com



I will be out to the airport on the 17th and would be most happy to do

that.



Rick



--

jimlc(at)att.net
Guest

Posted: Fri Jul 14, 2006 11:57 pm Post subject: broken push rod suberu ea81

My understanding from Lance is that the turbos did have hydraulic 

lifters and did not require adjustment.



Jim Crowder



At 11:51 PM 7/14/2006, you wrote:

[quote]



If you might post a shot to me too Rick, do the NSI turbos have hyd 

lifters? John

Reply-To: kitfox-list(at)matronics.com



I will be out to the airport on the 17th and would be most happy to do

that.



Rick



--

morid(at)northland.lib.mi
Guest

Posted: Sat Jul 15, 2006 3:26 am Post subject: broken push rod suberu ea81

Hello John.  All the EA81 NSI normally aspirated engines have solid lifters

and the turbos have hydraulics.  I don't know the reason for the difference.

Obviously the  solids need to be adjusted properly, especially right at the

beginning and periodically thereafter.  One of the most common reasons for

broken pushrods are incorrect adjustment which is an owner requirement.

Deke



---

wingsdown(at)comcast.net
Guest

Posted: Sat Jul 15, 2006 4:54 pm Post subject: broken push rod suberu ea81

That is correct, just the initial adjustment which is very important.



Rick



--

wingsdown(at)comcast.net
Guest

Posted: Sat Jul 15, 2006 4:55 pm Post subject: broken push rod suberu ea81

Yes they do. Also lifter bores are  bronze inserts.



Rick



--

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