Re: 1937 237 6 cylinder thermostat housing

Posted by TxGoat On 2024/6/21 10:26:42

I'd keep torque down to 15 to 20 ftlb with the cast iron water outlet. The later ones were steel and would not crack. The cast iron ones can crack, especially if they are rusted or have been overtightend in the past. With clean surfaces and a good gasket and sealer, you should be OK at the lower torque. I would avoid using a thick gasket on the cast iron outlet. A thicker gasket or double gasket can be used on the steel outlets.