Likely you are overtightening the housing. If you have paper gasket type, try using a double gasket. If "o" ring type, just use the gasket. When tightening the housing take up small amounts on both sides, alternating from one to the other. Tighten till it is firmly mounted but stop there. After filling system, check for leakage. if seepage is noted, take up on bolts one quarter turn or less till drip stops.always alternating from side to side. Unless you have the wrong thermostat in there this pretty much has to work.
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My check engine light came on in my car and a test was done and showed that i may have a cooling fan rlay circuit malfunction low . what needs to be done.
Inspect Hose Ruptured, Cracked or Leaking Raditor Hose. Inspect Head Gasket Leaking Head Gasket. Inspect Thermostat Thermostat Stuck Closed. Inspect Raditor Cap Worn or Damaged Raditor Cap. Inspect Raditor Raditor Fins Obstructed. Inspect Belt Missing or Broken Water Pump Belt. Inspect Heater Core Heater Core May Be Leaking Antifreeze/Coolant into The Vehicles Floor Area. Inspect Intake Manifold Gasket Leaking, Worn, or Damaged Intake Manifold Gasket. Inspect Raditor Fan Motor Faulty Raditor Cooling Fan Motor. Inspect Relay - Raditor Cooling Fan Motor Faulty Cooling Fan Relay. Inspect Fan Blade Broken, Missing, or Faulty Fan Blade(s). Inspect Cooling Fan Switch - Raditor Faulty Raditor Cooling Fan Sensor/Switch. Inspect Water Pump Leaking Water Pump.try this list it should help u fix the problem
it is located on the engine (block - in the front).
Make sure the engine is completely cool prior to working on the engine. Then place the drain pan underneath the radiator. Open the petcock at the base and let out approximately 1 gallon of coolant.
Unbolt the thermostat housing from the front of the engine using the 3/8-inch ratchet and socket. Coolant will pour out at this point, so be ready for it and aim the hose toward the drain pan if possible. Remove the thermostat and the thermostat gasket.
Clean all of the mating surfaces on the engine and thermostat housing using the gasket scraper. Then install a replacement thermostat in the housing, with the thermostat orienting the same way as the original. Then install the gasket and the thermostat housing on top of it. Bolt it in place using the 3/8-inch ratchet and socket.
Open the radiator cap and fill the radiator with the 50-50 pre-diluted coolant. Turn on the car and let it run for 15 minutes while the interior heat is set on the "high" position. Allow the car to cool for an hour, then add any additional coolant needed
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