The housing needs to be removed. Check for scratches on the housing or engine. Make sure that all of the old gasket is removed before using gasket sealer to help seal the new gasket.
If the thermostat was not installed correctly, the housing can crack but it would leak engine coolant not oil.
Any coolant leak can cause an overheat.Any coolant leak can cause an overheat.
A crack near or on the thermostat housing can cause a coolant leak in a 1996 Grand Marquis. The thermostat housing is located near the manifold on this vehicle.
Low coolant level, internal or external coolant leak or faulty thermostat.
Leaking hose? Defective thermostat housing or bad thermostat gasket? Bad water pump or gasket? Leak in radiator? Leak at heater core? Leak at head gasket? Coolant recovery tank?
your temp guage will sky rocket if its bad, you may even have coolant a coolant leak (comming out of the the housing of the thermostat). replacing it is easy and cheap.
sounds like either the thermostat housing or hose connection.
The housing retainer bolts are loose or the gasket has deteriorated. If replacing the gasket, use pliable gasket sealant to improve the seal. it could also be the water pump went bad and leaking water down beside the thermostat. the thermostat is part of the water
water pump or thermostat housing crack
If you have coolant on the top of the engine it could be a leaky thermostat housing or a leaking intake gasket.
Loose hose clamp or fitting? Thermostat housing loose? Expands when gets hot
can be water pump, radiator, heater core, thermostat housing, hose, or freeze-out plugs