Thread: Running Cold
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Old 02-17-2009, 10:11 PM
Tom Graham Tom Graham is offline
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Running Cold - Update

Thanks for all the comments. The note attached to the response from "Dromo" seems to lend credit to my thinking about too high a pump pressure.

Regarding the comments re a bad thermostat perhaps I should add some more info.

I checked the original thermostat, an old 3 spring Holley and it worked OK.

However, not being sure of the age of the pump impeller I replaced it and installed the larger shim type devices that came with the kit, that produce a greater impeller deformation to give more flow and perhaps pressure, the two usually go together. I believe this is when it started to run cold.

The cyl head casting is in good condition and the Thermostat fits in its recess snugly and seems to seal fine. The housing was a little corroded however.

So I purchased the MOYER thermostat, the lower price one, the necessary spacer and special nuts plus the bronze housing. It still ran cold and that's where I am now.

Any others that migth agree with the idea of the higher pressure pump forcing the water past the Thermostat??

Thanks again,
Tom G.
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