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Old 06-01-2020, 10:02 PM
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Tom Vaught Tom Vaught is offline
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Join Date: Dec 2001
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If you put the head in a wash tub, you can hook a hose to a faucet that allows hot and cold water.
If still on the engine use longer hoses.
Rig up a hose that puts water into the passage at the front of the engine and look for flow from a hose attached to the fitting on the rear of the head. cold water first. Does the water flow a minimal amount?

Then turn the hot water on and let it flow thru the head, if the flow increased after a period of time the valve is working fine.

Tom V.

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Last edited by Tom Vaught; 06-01-2020 at 10:12 PM.