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Increase oil pressure using washers?

Matronics Email Lists Forum Index -> JabiruEngine-List

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matronics(at)rtist.nl
Guest

Posted: Wed Oct 03, 2007 9:06 am Post subject: Increase oil pressure using washers?

MessageGood day,



With all the heated debate going on I hardly dare to ask... 



The Jabiru 3300 maintenance manual section 7.4.2 Sub-assembly B lists the 

following advice to increase oil pressure:



"To increase oil pressure one or two AN4 washers can be placed behind the 

relief valve

spring."



Silly question, but what is "behind" ? Does that mean the extra washer(s) go 

in first into the crankcase cavity, or does the spring go in first and then 

the washers?



Can anyone who has already done this comment on how much pressure gain you 

can expect from a single or double washer?



Thanks,

Rob

Gilles.Thesee(at)ac-greno
Guest

Posted: Wed Oct 03, 2007 9:23 am Post subject: Increase oil pressure using washers?

Rob Turk a écrit :

 	  Quote: 	
		   Does that mean the extra washer(s) go in first into the crankcase 

 cavity, or does the spring go in first and then the washers?


	


Rob,

Just as displayed in the book : washer, spring, plunger, valve seat, 

circlip.

See

http://contrails.free.fr/images/Jabiru/relief.jpg



The Jabiru manuals are worth downloading.



Best regards,

-- 

Gilles

http://contrails.free.fr

matronics(at)rtist.nl
Guest

Posted: Wed Oct 03, 2007 11:10 am Post subject: Increase oil pressure using washers?

Thanks Gilles.



I have the manuals, but this picture definitely isn't in any of the ones I 

know. Where did you find this?



Rob



---

Gilles.Thesee(at)ac-greno
Guest

Posted: Wed Oct 03, 2007 1:39 pm Post subject: Increase oil pressure using washers?

Rob Turk a écrit :

 	  Quote: 	
		   I have the manuals, but this picture definitely isn't in any of the 

 ones I know. Where did you find this?


	


http://www.usjabiru.com/Service%20Bulletin.htm

Click on 2200 Hydraulic Lifter Parts Manual

Best regards,

-- 

Gilles

http://contrails.free.fr

ElleryWeld(at)aol.com
Guest

Posted: Wed Oct 03, 2007 2:04 pm Post subject: Increase oil pressure using washers?

You should put the Ball in the crank case first  then the spring then the cap with the washers in it  last

  

  Ellery in Maine

  



See what's new at AOL.com and Make AOL Your Homepage.

  [quote][b]

Gilles.Thesee(at)ac-greno
Guest

Posted: Wed Oct 03, 2007 2:22 pm Post subject: Increase oil pressure using washers?

Rob Turk a écrit :

 	  Quote: 	
		   I have the manuals, but this picture definitely isn't in any of the 

 ones I know. Where did you find this?

Rob,
	




3300 Solid Lifter  Instruction & Maintenance manual section 8.6.1 page 

45 shows the relief valve assembly

3300 Hydraulic Lifter Instruction & Maintenance manual page 43 shows same



Best regards,

-- 

Gilles

http://contrails.free.fr

Gilles.Thesee(at)ac-greno
Guest

Posted: Wed Oct 03, 2007 2:39 pm Post subject: Increase oil pressure using washers?

ElleryWeld(at)aol.com a écrit :

 	  Quote: 	
		   You should put the Ball in the crank case first  then the spring then 

 the cap with the washers in it  last


	


Ellery,



I have been following the Jab engine career for about 10 years, and as 

far as I know the pressure valve has always been of the poppet/plunger 

type on 2200s and 3300s.

Do you have a particular model or s/n in mind ?



Best regards,

-- 

Gilles

http://contrails.free.fr

N1BZRich(at)aol.com
Guest

Posted: Wed Oct 03, 2007 4:49 pm Post subject: Increase oil pressure using washers?

In a message dated 10/3/2007 1:07:23 P.M. Eastern Daylight Time,  matronics(at)rtist.nl writes:

  	  Quote: 	
		  Does    that mean the extra washer(s) go 

in first into the crankcase cavity, or    does the spring go in first and then 

the  washers?

	


 

 Rob, Yes, the washers go in first.  You will probably find one already  in there, so you can add up to two more.  My experience on  my engine is that one AN4 washer will add 5 to 8 psi.   Another couple of observations: 

 - if your oil temp is running on the high side, the oil pressure will  be lower.  Makes sense.  

 -if you keep the oil level in the sump so that it at the top of the dip  stick range, your oil cooling will not be as efficient.  I keep  mine between the middle of the dip stick range to the bottom of the  range.  

 Blue Skies,

 Buz



See what's new atblank">Make AOL Your Homepage.

  [quote][b]

matronics(at)rtist.nl
Guest

Posted: Thu Oct 04, 2007 3:39 am Post subject: Increase oil pressure using washers?

Hi Gilles,



That explains. I have a solid lifter engine, so I never bothered to look at 

the manuals for newer engines. I downloaded the hydrolic lifter parts 

manuals just now, and the pictures are waaay better than those for my solid 

lifter engine. Thanks!



Rob



---

Gilles.Thesee(at)ac-greno
Guest

Posted: Thu Oct 04, 2007 4:35 am Post subject: Increase oil pressure using washers?

Rob Turk a écrit :

 	  Quote: 	
		   That explains. I have a solid lifter engine, so I never bothered to 

 look at the manuals for newer engines. I downloaded the hydrolic 

 lifter parts manuals just now, and the pictures are waaay better than 

 those for my solid lifter engine. Thanks!


	


Rob,



Yes, the newer manuals show nice 3D drawings, but the older manuals, 

(such as my 11 year old Maintenance manual) show them all the same, 

albeit in 2D only.

What matters is you got your answer, and most important, we now all know 

where to get up-to-date books 



Best regards,

-- 

Gilles

http://contrails.free.fr

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