Question about 1999 Ford Taurus
I had intake manifold removed so thermostat replaced, bolts broke as housing reattached. Sealant used on top of housing (manifold) to cover/seal any future leak from housing damage. Now leak from housing feels like oil, not coolant. Could it be?
You need to remove the thermostat housing again. Then you will have to extract the bolts you broke off. You will need to drill and tap them so you can use an easy out to remove the broken bolts from the threads. Then you can clean up both mating surfaces and replace the gasket and the thermostat. Check to make sure you did not crack the thermostat housing or you may have another leak when finished. They are usually aluminum and break easily if too much pressure is applied or they are corroded and weak.
Posted on Feb 26, 2009
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Posted on Jan 02, 2017
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Please see my tip at http://www.fixya.com/cars/r5929960-s_thermostat .
Specific instructions for your car are as follows. Let me know if you get stuck or have more questions. 5.3L Engine
Removal & Installation
NOTE The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
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