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Tractor Talk Discussion Forum

John Deere B cylinder head question

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Tim

12-26-2003 15:02:19




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I broke the center out of a spark plug and welded in a 1/4 inch air fitting so I could put air pressure in the cylinders and check the condition of the valves, guides ect. With both valves closed I put pressure in the # 2 cylinder and I have air blowing out around the push rods and out the oil fill hole with the cap removed. If I do a compression test both cylinders are within ten pounds of each other and both hold pressure for about 15 to 20 minutes. I have no air blowing out the intake side of the manifold with the carb removed. And no air blowing out the exhaust side of the manifold with the exhaust pipe removed. Can anyone tell me why I have air blowing out around the push rods. Thanks for any help, Tim

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Stumpy

12-26-2003 19:58:46




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 Re: John Deere B cylinder head question in reply to Tim, 12-26-2003 15:02:19  
How much air pressure did you use. If you used 150 lbs. you blew air right past the rings into the crankcase. Use 50 lbs. and see what happens



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