oleman77 Posted April 11, 2011 Share Posted April 11, 2011 Need some help troubleshooting what could cause low compression on 2 cylinders. Performed a compression check last night and found that the two cylinders on the passenger side have only 15# of compression. The two on the drivers side showed 118# & 108# which I assume is good. Any deas what would cause low compression on two cylinders on the same side? I'm thinking valve/head issues but I'm not sure. Also what is normal compression for a ea71? Thanks....pete Quote Link to comment Share on other sites More sharing options...
Whitehog Posted April 11, 2011 Share Posted April 11, 2011 I'm no mechanic but in my research I've heard low compression is usually either valve adjustment or worse burnt rings and bearings. I'm getting oil blowback out of the top of mine and loss of power, i hear thats usually the cause. This could be different for boxers, i'm not sure yet, but if i find more info I'll post up. I'm sure the resident experts can help,(hint hint) it's a common engine problem. Quote Link to comment Share on other sites More sharing options...
oleman77 Posted April 11, 2011 Author Share Posted April 11, 2011 I'm no mechanic but in my research I've heard low compression is usually either valve adjustment or worse burnt rings and bearings. I'm getting oil blowback out of the top of mine and loss of power, i hear thats usually the cause. This could be different for boxers, i'm not sure yet, but if i find more info I'll post up. I'm sure the resident experts can help,(hint hint) it's a common engine problem. Ok thanks for responding... Quote Link to comment Share on other sites More sharing options...
naru Posted April 11, 2011 Share Posted April 11, 2011 Seeing how adjacent cylinders are both poor,head gasket leaking compression between them is a possibility. Quote Link to comment Share on other sites More sharing options...
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