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compression varition 700 1988

posted by  steve oakes on  Tue Jan 1 05:22 CST 2002
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last visit: Thu Oct 16 16:05 CST 2014
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On my 760 turbo (K block) with 2000K miles the compression reads 1,2,&3: 135lbs. No 4 reads 150. I feel it when accelerating and coasting at low speeds. The car uses minimal anounts of oil (half a quart in 5,000 miles of 70+mph. driving) and has no appreciable blowby (dry intake hoses and passes jiggle test). My problem is...valves? Some are a bit tight (.010 clearance vs. .018, with the exception of the valves for #4, which are right on. Can this be the problem--would being .008 off make a 20lb. difference? I think not, but I'm no engine pro. Wat do you all think? Any similar experiences? Thanks!
-Steve
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