Question about 1999 Pontiac Grand Prix

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THERMOSTAT REPLACEMENT WHERE IS THE THERMOSTAT LOCATED where is the themostat at in a 94 grand am quad 4 engine

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Follow the top rad hose to the engine, where it connects that's the thermostat housing.

Posted on Jun 01, 2009

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If it is a 2.3 liter quad 4 it's in the upper radiator hose in the back of the head you have to remove the housing and it's in there If it's the plastic housing on the rear of the head it's not there is located under the water pump on the right side of the engine back by the fire wall you have to remove the metal pipe that goes under the oil pan and it sits on top of that pipe.
If it has the aluminum housing for the upper radiator hose it's behind the housing. If it's a 2.4 Quad overhead cam engine they are all under the water pump. 
Good luck and Hope this helped.

Posted on Jun 01, 2009

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How do i change thermostadt on jeep cherokee


  1. Follow your upper raidator hose untill you find the themostat housing which is the ending point for the hose.
  2. Remove the two bolts that hold the housing (you may have to loosen the belt to get to one of the bolts).
  3. Remove housing and replace themostat and gasket ( remove any excess gasket that may have been left over ).
THE DETAILED PROCEDURE IS GIVEN BELOW
  1. Open draincock on the radiator to drain the coolant from your Jeep Grand Cherokee. This draincock is located on the lower right side facing the rear of your Cherokee.
  2. Use a sealable container and reuse the coolant if it is relatively new and clean.
  3. Follow the upper radiator hose to the point where it meets the thermostat housing. The thermosat is located inside the housing.
  4. Use a clamp tool or vise-grip pliers to loosen the clamp holding the hose to the housing. Work the end of the radiator hose free of the thermostat housing.
  5. Remove two bolts holding on the thermostat housing cover. Pull off the cover.
  6. Take note of the position of the old thermostat. Remove and install the new thermostat in exactly the same position.
  7. Scrape off residue of the old thermostat gasket from the inside of the thermostat housing cover using a razor blade. Avoid getting any debris inside the thermostat housing.
  8. Install the new gasket. Reattach the thermostat housing cover and radiator hose. Start your Jeep and run the heater on high. Allow the engine to warm up. Check for leaks.

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