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Re: Help

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Author  [Modern View]

03-25-2014 05:05:53

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If everything looks good up top, it may be a valve not seating or hanging open some. I like to make an adapter for the compression tester to put compressed air in the cylinder. Lets you get an idea where the leak is.

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03-25-2014 12:03:26

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 Re: Help in reply to mmfan, 03-25-2014 05:05:53  
Jason, we crancked it over while watching the valve action and all the valves were coming back to the top. I agree with you that for some reason the valves are open when the piston comes to the top. How else could there be valve marks on the pistons. You would think valve timing, but #1 & #2 are fine. Scratching my head here.

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03-27-2014 05:03:40

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 Re: Help in reply to dkr, 03-25-2014 12:03:26  
I would check the cam timing, Are the gears correct? Are you lining up the timing marks? Go through and check that stuff first.

My point to pressuring the cylinders is you can feel the intake, exhaust, and crankcase for air flow. It lets you determine where to start.

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kevin moschenrose

03-25-2014 21:49:38

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 Re: Help in reply to dkr, 03-25-2014 12:03:26  
It maybe the valves are not fully closing when they should via hanging up in the guides or weak springs maybe?

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03-26-2014 06:19:23

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 Re: Help in reply to kevin moschenrose, 03-25-2014 21:49:38  
We thought about that and actually watched the valve action when it was running. They all worked normally. I'm lost.

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