Question about 2003 Chevrolet Silverado 2500HD

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Need to replace thermostat on 2005 Chevy 2500HD 4x4

Housing appears to be located on bottom radiator hose of the 6.0 liter motor. Is this true and are there any tips I should know?

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The thermostat is located in the water pump next to the 2 heater hoses. I think you have to buy the housing to get a thermostat. Not serviced seperately.

Posted on Feb 20, 2009

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How do you change the thermostat on a 2001 chevy s-10 4.3 liter v-6


Hello rev7, this is an easy job on the 4.3 litre engine.

Drain some of the engine coolant by placing a bucket under the radiator and open the petcock (the plastic bolt facing the engine) located on the bottom of the radiator. Empty the coolant from the radiator until the radiator is about half full.

Remove the air intake, hose and the coolant neck (outlet) bolts using a ratchet and & 13 mm socket. Remove the outlet from the intake manifold. Take note of the direction the thermostat is seated and then remove the thermostat from the housing.
Clean the remains of the old gasket or sealer from the housing and outlet. Install the thermostat and gasket to the intake manifold in the same direction it was seated before removal. Put a thin layer of silicone on the water outlet surface. Install the outlet before the silicone dries

Install the water outlet bolts. Tighten the bolts to 18 foot pounds
Filll the radiator completely and check for any leaks. Install the radiator cap. Install the air cleaner inlet hose. Start the engine and turn the heater on with the blower on high & run the engine until the thermostat opens. The top radiator hose will be hot when the thermostat opens.

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How do you change the thermastat on the 2005 ford explorer sport trac


  1. 1 Drain the coolant from your Explorer into an adequate container by opening the drain plug at the bottom of the radiator. Save the coolant for reuse if it is relatively new and clean.
  2. 2 Remove the negative battery cable from the battery if your Explorer has a 2.9-, 3.0-, 4.0- or 5.0-liter engine. This step is not necessary for 2.3- and 2.5-liter engines.
  3. 3 Follow the upper radiator hose to the front driver's side of the intake manifold, where it meets the engine. This is where the thermostat housing on your Ford Explorer is located. If necessary, remove the air cleaner duct for easy access to the housing.
  4. 4 Loosen the clip on the end of the radiator hose and pull the hose off the thermostat housing. Use a 10mm wrench or socket to remove the two retaining bolts on the thermostat housing cover. Remove the cover.
  5. 5 Note the position of the thermostat before removal. Pull out the old thermostat. Seat the new thermostat inside the housing in the same position as the old one, spring-side facing into the engine. Install new gasket over the thermostat.
  6. 6 Reattach the thermostat housing cover and the radiator hose. Reinstall the air cleaner duct if removed earlier. Fill the radiator with reserve or new coolant. Start your Explorer and run with the heater blowing until the engine gets warm. Check for leaks.

Read more: How to Change the Thermostat in a Ford Explorer ' eHow.com http://www.ehow.com/how_4484916_change-thermostat-ford-explorer.html#ixzz1CLSvmPwR

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  2. Drain the cooling system.
  3. Remove the radiator outlet hose.
  4. Remove the thermostat housing bolts.
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The O-ring seal is integral to the thermostat housing



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Thermostat housing-4.8L, 5.3L and 6.0L engines


To install:

  1. Install the thermostat to the water pump housing making sure the spring side is inserted into the engine.
  2. Install the bolts.
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Drain enough coolant to make the water level below the the thermostat level so that the coolant doesn't spill everywhere...

Remove the thermostat:
The housing is held down by two bolts.
Remove the bolts, remove the thermostat and scrape the gasket and sealant from the housing and the manifold.

When replacing, use Permatex #2 - non-hardening gasket sealant.

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1:drain the radiator(there is a drain **** at the bottom of the radiator protrudes from rad looks similar to a wing nut)
2:Remove the two bolts in the thermostat housing(there may be some nuts holding some ground wires there that you have to remove before you can remove the thermostat housing bolts)
3:remove the housing ...........note: make note of the position of the thermostat before removal.
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