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Re: dissappointing compression test

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Author  [Modern View]

12-11-2012 15:14:44

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I also do five puffs as Dell noted. First puff needs to be at least 1/2 of final puff otherwise suspect rings. Also compression tests need to be done on a warm engine that can achieve proper cranking RPM so... good starter and fully charged battery are necessary. If you are ever concerned about where the leakage is going you'll need to check cylinder leakage with guages. Gerard

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12-11-2012 16:14:09

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 Re: dissappointing compression test in reply to ASEguy, 12-11-2012 15:14:44  
Gerard everything I know about compression testing i learned on the internet, mostly on this site. I did drive it and get it to operating temperature before testing, because that's what I read to do. Tractor is 12v and battery had full charge it was spinning fast.

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12-12-2012 01:10:03

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 Re: dissappointing compression test in reply to carlntexas, 12-11-2012 16:14:09  
Carl, Yours sounds like relatively even wear for an older engine. If it's doing the job she's good to go. There are three compression tests that can be performed: dry cranking, wet cranking and running. If dry and wet cranking are inconclusive then cylinder leakage tests will isolate the leakage. Running compression tests the valve train for issues like bent pushrods, worn cam lobes "etc".

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12-12-2012 06:20:17

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 Re: dissappointing compression test in reply to ASEguy, 12-12-2012 01:10:03  
push rods, neat...

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