I cannot stop the thermostat from leaking

I am at my wit's end. I have a 2002 Dodge Durango 5.9L, and performed a coolant flush (it was long overdue for one) It took me 16 gallons of distilled water before it finally came out mostly clear. Anyways, I have everything complete, however every time I install the thermostat housing (which is brand new, as well as the hose) there is a leak right between the housing and manifold. At first I tried using just the paper gasket. Then after a couple of failed attempts, I tried lightly sanding... I cannot stop the thermostat from leaking

I am at my wit's end. I have a 2002 Dodge Durango 5.9L, and performed a coolant flush (it was long overdue for one) It took me 16 gallons of distilled water before it finally came out mostly clear.

Anyways, I have everything complete, however every time I install the thermostat housing (which is brand new, as well as the hose) there is a leak right between the housing and manifold.

At first I tried using just the paper gasket. Then after a couple of failed attempts, I tried lightly sanding...

I cannot stop the thermostat from leaking

Sun, 04 Sep 2022 00:22:20 +0000
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