1998 Jeep Laredo Thermostat leakage

1998 JEEP GRAND CHEROKEE LAREDO
166,700 MILES • 6 CYL • 2WD • AUTOMATIC
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MRCINC2000
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  • 2 POSTS
My thermostat housing was leaking so I replaced the thermostat itself and the housing. I cleaned the old gasket off the engine and wiped it clean. I put the new gasket in place and put on a new housing. Both bolts were tightened. With in about 2 minutes of turning engine on, coolant started bubbling out from the edges of the thermostat housing. Then when I shut off the engine it stated squirting.
Can I use silicone to help seal it or is there another underlying problem?
Other parts that were replaced recently are: Harmonic balance pulley, water pump, and several coolant hoses.
Jul 31, 2010 at 8:33 AM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
Either the tstat is upside down, not allowing proper tightening of the housing, or the intake manifold could be cracked. Pressure tester will expose where the leaks are... Autozone will loan you the tester.
Jul 31, 2010 at 8:38 AM
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MRCINC2000
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I called autozone and explained the situation and told them your response and they asked what kind of pressure tester I wanted. Never used one, so I have no clue.
Jul 31, 2010 at 8:55 AM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
radiator pressure tester.
Jul 31, 2010 at 12:46 PM
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