willyburns Posted December 6, 2004 Share Posted December 6, 2004 Greetings All. I'm looking to buy a subaru, and I am going to compression test it. What is an acceptable range for an 86 GL no turbo with 150k. Obviously, I will be on the lookout for even compression accross all the cylinders, but I want to know how tired this thing is. 125-130 psi?? What is the factory spec. on a new motor? Thanks! Quote Link to comment Share on other sites More sharing options...
DerFahrer Posted December 6, 2004 Share Posted December 6, 2004 Ideally, it would be at 150 psi or a little bit more in all 4 cylinders. But the most important thing to check for is consistency between all 4 cylinders. For example, if you have one cylinder down considerably, you might have a burnt valve or a damaged cam lobe or incorrect cam timing. If you have two cylinders down on one side of the engine, that's a strong indication of a blown headgasket. Stuff like that. Quote Link to comment Share on other sites More sharing options...
willyburns Posted December 6, 2004 Author Share Posted December 6, 2004 Thanks very much. Quote Link to comment Share on other sites More sharing options...
Petersubaru Posted December 6, 2004 Share Posted December 6, 2004 For what ever it is worth...Factory specs for a new N/A EA82 motor is 168psi...my 86 with 200,000mi on it has between 155-160...but then again this car I have had since near new/mostly highway miles/oil changed every 3000mi. I'm looking to buy a subaru, and I am going to compression test it. What is an acceptable range for an 86 GL no turbo with 150k. Obviously, I will be on the lookout for even compression accross all the cylinders, but I want to know how tired this thing is. 125-130 psi?? What is the factory spec. on a new motor? Thanks
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