Re: Thermostat gasket

Posted by HH56 On 2020/4/19 13:52:08

One thing for a one time attempt is to make sure both surfaces are completely clear of the old gasket. Use a scraper and even some gritted material if you need to and get every last bit of any old stuck on gasket material off both surfaces. Also check the surfaces and particularly the thermostat side it it is one of the stamped steel housings for any pitting or rusted areas. The cast iron usually holds up to pitting better than the steel but it can still occur. If the defect is large enough the coolant will find a way to seep thru. If you find any rough areas I would also apply a thin coat of coolant friendly sealant such as non hardening Permatex or Silicone to the gasket.