Re: 1942 farmall h problem

Posted by Hermit on May 23, 2005 at 17:43:00 from (69.21.48.87):

In Reply to: 1942 farmall h problem posted by Andy(PA) on May 23, 2005 at 06:40:33:

To check if you have an internal manifold leak - Disconnect coil wire so engine won't accidentally start then rotate engine till any cylinder has exhaust valve full open. Remove spark plug from this cylinder and install an adapter which a low pressure air source (compressor) can be connected. Turn on air and cover exhaust pipe. Then listen inside the intake manifold for a leak. A small hose placed up to the ear and the hose moved into various locations inside the manifold will help. Basically, you're pressurizing the exhaust manifold and listening for a leak on the intake side. If you put too much pressure in the cylinder, watch out because the piston will move and rotate the engine. However, as others have said, this type of leak is a rare occurance.

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