xtela
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- Aug 18, 2012
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Thanks for the info. I'll give it a shot! This stupid leak, even though it's very small, really torques me!@Skiracer3
No, you do not use both, only the housing gasket that the thermostat fits in.
If someone tried to use both and tightened the two bolts too much,
It will deform the the thermostat housing and it will leak.
1991-2025 Ford Engine Coolant Thermostat Housing Gasket F1VY-8255-A | TascaParts.com
1991-2025 Ford part # F1VY-8255-A - Engine Coolant Thermostat Housing Gasketwww.tascaparts.com
I am in the process of doing this service. I purchased the F1VY-8255-A gasket and it is indeed an o-ring. it is NOT a "square" gasket and the thermostat will NOT fit inside this gasket. From reading this and other threads, I believe the correct part is indeed an o-ring as that's whats shown in the ford manual linked here. Similarly, I purchased Motorcraft thermostat TL3Z-8575-E which has a etching showing 88.9* C (192.02*F) IS this the correct part?@Skiracer3
No, you do not use both, only the housing gasket that the thermostat fits in.
If someone tried to use both and tightened the two bolts too much,
It will deform the the thermostat housing and it will leak.
1991-2025 Ford Engine Coolant Thermostat Housing Gasket F1VY-8255-A | TascaParts.com
1991-2025 Ford part # F1VY-8255-A - Engine Coolant Thermostat Housing Gasketwww.tascaparts.com