Tuesday, January 7, 2014

How to replace the thermostat on a 3.0L Dodge Caravan

     Lack of heat in my 2000 Dodge Caravan signaled that the thermostat is likely stuck open and will need replacement.


1) Drain the radiator by un-clamping the lower hose under the radiator and pulling the hose off. Catch the coolant in a pan. This hose is tucked under there pretty good. Removing the coolant recovery bottle may help.
Use a pliers to remove the clamp and then pull off the lower radiator hose
2) Remove the upper clamp at the thermostat housing.
3) Break the stuck hose loose with channel lock pliers and pull the hose off the housing.

View with upper radiator hose removed and out of the way

4) Unbolt the the 12mm bolts holding the thermostat housing in place. It may be easier to remove the vacuum line over the housing and unplug the thermo-sensor wiring.
5) Remove the thermostat housing.
6) Remove the thermostat.
7) Thoroughly clean the old gasket material from both the housing and the engine block.
Carefully remove the gasket material from the housing and the engine

8) Insert the new thermostat with a new gasket and torque to 105 in lbs.
9) Re-install the hose and clamp.
10) Fill with coolant.
11) Run and check for leaks.


                                                       

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