Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Subaru engine in aircraft
Posted 15 March 2004 - 06:55 PM
One thing I noticed is that the author did many 'injected cooling system overheating' tests on EJ25 by getting small amount of air trapped in the cooling system. And succeeded to warp the head after few tries.
And addition of a small air vent on top of block pretty much fixed everything and made the engine bulletproof to overheating (and head gasket failure, warped head, etc.).
I was wondering whether most head gasket failures in EJ25 engines were due to similar reason. ie. Small amount of air got trapped after coolant change, caused bad heat transfer under heavy load, engine got overheat and head gasket blew...
OK. I was daydreaming but I hope someone more knowledgible can comment on this thought.
Posted 15 March 2004 - 08:32 PM
With the new Gen Subie's proclivity to cooling system bleeding difficulties, does this expalin the 2.5's growing reputation for head gasket problems?
Posted 15 March 2004 - 08:53 PM
Posted 25 March 2004 - 01:35 PM
"Head warp caused by customers changing their coolant is now the number one warranty item with this engine. All caused by an engine block that was not plumbed to dynamically remove air from the high point. Subaru has since changed their cooling system design."
Is the 2.5 gen II SOHV the one with improved plumbing?
Posted 25 March 2004 - 07:17 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users