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compression test questions 200 1989

posted by  anthony2 on  Mon Dec 3 21:45 CST 2012
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last visit: Tue Jul 22 20:01 CST 2014
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Its been so long since I did a compression test myself, I've forgotten some details, and I’ve never run a comp test on any Volvo. I bought a comp tester today and will attempt to run the test this weekend.

The questions are: Do I take out ALL the spark plugs first, or 1 at a time, putting each one back before the testing next cylinder?? (I will disconnect the coil wire so it wont start.) . Should I lube in some way the threads on the tester? Do I have to be concerned about fuel “pushing out“ when the engine is turning over, or fuel collecting in the cylinders?

I also assume it takes just a few revs with the starter to get the numbers on the tester. Any other suggestions? I’ll look up the “recommended” compression numbers in the book, but I at least hope all cylinders will be pretty equal to each other. .

It really has been a lonnggg time. Thanks.






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