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How do I replace the Thermostat in a 2002 Dodge Ram 1500

How do I replace the Thermostat in a 2002 Dodge Ram 1500

I need to removal and replace the thermostat in my 2002 Dodge Ram 1500 4.7

Asked by: Guest | Views: 98
Total answers/comments: 3
bert [Entry]


All gasoline powered models are equipped with

On-Board Diagnostics for certain cooling system components.

Refer to On-Board Diagnostics (OBD) in the Diagnosis section of this group for additional information. If the powertrain control module (PCM) detects low engine coolant temperature, it will record

a Diagnostic Trouble Code (DTC) in the PCM memory. Do not change a thermostat for lack of heat as indicated by the instrument panel gauge or by poor heater performance unless a DTC is present. Refer to the Diagnosis section of this group for other probable causes. For other DTC numbers, (Refer to 25 - EMISSIONS


The DTC can also be accessed through the DRB scan tool. Refer to the appropriate Powertrain Diagnostic Procedures information for diagnostic information and operation of the DRB scan tool.



Do not waste reusable coolant. If solution is clean, drain coolant into a clean container for reuse.

If thermostat is being replaced, be sure that replacement is specified thermostat for vehicle model and engine type.

(1) Disconnect negative battery cable at battery.

(2) Drain cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).

(3) Raise vehicle on hoist.

(4) Remove splash shield.

(5) Remove lower radiator hose clamp and lower radiator hose at thermostat housing.

(6) Remove thermostat housing mounting bolts,thermostat housing and thermostat.


(1) Clean mating areas of timing chain cover and thermostat housing.

(2) Install thermostat (spring side down) into recessed machined groove on timing chain cover.

(3) Position thermostat housing on timing chain cover.

(4) Install two housing-to-timing chain cover bolts. Tighten bolts to 13 N·m (112 in. lbs.) torque.

CAUTION: Housing must be tightened evenly and thermostat must be centered into recessed groove in timimg chain cover. If not, it may result in a cracked housing, damaged timing chain cover

threads or coolant leaks.

(5) Install lower radiator hose on thermostat housing.

(6) Install splash shield.

(7) Lower vehicle.

(8) Fill cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).

(9) Connect negative battery cable to battery.

(10) Start and warm the engine. Check for leaks

If you are more of a visual person, check on here.It's a Durango but same engine, same procedure same location. Hope this helps, good luck"
bert [Entry]

Here's a video on how to do it: http://www.youtube.com/watch?v=C88q8eBhA...
bert [Entry]

This good, but what would be better would be listing the Probable causes instead of referring us to dome other site or Document.