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Tractor Pulling Discussion Forum

compression check

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Author  [Modern View]
ANDY E

03-31-2013 15:37:46
209.173.191.117



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what is the proper procedure to compression check each cylinder?




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MLPANKEY

04-01-2013 11:11:52
152.85.8.38



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 Re: compression check in reply to ANDY E, 03-31-2013 15:37:46  
Dave and Andy are telling you right . However you can also see how much your cams overlap is costing you in compression. After getting initial reading as above with engine warm i might add. Back off the exhaust rocker so that the exhaust valve doesnt open at all and lash the intake valve to .050 and turn engine over and read gauge. This removes all the cam overlap from equation. This will give you a idea of how many psi can be gained by advancing the cam .

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Dave Thompson jr

03-31-2013 17:56:53
64.184.126.173



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 Re: compression check in reply to ANDY E, 03-31-2013 15:37:46  
When doing a compression test I remove all the spark plugs and crank it over and check each cylnder. When I do a cylnder leak down test I back off the rocker arm and put air in to the cylnder and see what it holds to see if its getting by the valves or going other places. Many things can be solved by simple tests. At work we have injectors we hook air to to find problems and well as bore scopes to look into cylnders before a major tear down.

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Unstylish

03-31-2013 19:22:41
76.253.105.163



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 Re: compression check in reply to Dave Thompson jr, 03-31-2013 17:56:53  
Your throttle should b e open too



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