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Where is the thermostat in my 2000 acura - 2000 Acura TL

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Removal & Installation

  1. Disconnect the negative battery cable.
  2. Drain the cooling system into a suitable container.
  3. Locate the thermostat housing by following the upper radiator hose to the engine.
  4. Loosen the hose clamps then carefully detach the hose from the fitting.
If the hose is stuck, carefully use a pick to break the seal between the radiator hose and the housing. If the hose is deteriorated, replace it with a new one.
  1. Disconnect any sensors or switches that may interfere with the removal of the thermostat from the housing.

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Remove the thermostat housing bolts

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Note the installed position of the thermostat, then remove it

  1. Unfasten the retainers, then remove the thermostat housing.
Some coolant may leak out of the housing as the seal is broken.
  1. Remove the thermostat carefully noting how it's installed.
  2. Clean the mating surfaces of the thermostat housing.
Many thermostat housing's are made out of aluminum alloy. A plastic scraper is very effective and will not harm such metals.To install:

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A new gasket must be installed before installation

Install the thermostat with the air bleed valve at the top

  1. Install the new thermostat and gasket.
Install the thermostat with the jiggle pin facing up. This acts as an air bleed and must be at the top of the thermostat to operate properly.
  1. Install the thermostat housing, then tighten the bolts securely.
  2. Connect the radiator hose and tighten the hose clamps securely.
  3. Install any remaining components, then refill the cooling system.
  4. Start and run the engine until it reaches normal operating temperature while checking for leaks.

Posted on Jun 04, 2010

  • Adam415f Feb 15, 2012

    This was helpful, I had to remove the battery, and after the housing was off I had to literally pull the old thermostat out with channel lock pilers. Start to finish too 2 hours working at a slow pace
    - Adam



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