Thermostat

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To drill or not to drill.

On my engine rebuild, I replaced the stock water pump with the Weiand aluminum version. This pump blocks off the bypass in the block so I've installed a regular standard Ford thermostat in place of the special Cleveland version. Should I drill two 3/16th holes in the rim of the new thermostat to allow for some bypass prior to the opening of the thermostat? Some say yes, others no. Opinions?

Thanks,

Joel

5/17/045:34 PM

Original Post

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