Jeep 52079476AE THRMOSTAT

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If the engine takes a long time to warm up, it likely indicates that the thermostat is stuck open. In such a case, replacing the thermostat with a new one is recommended.

Start by disconnecting the cable(s) from the negative battery terminal(s) and draining the cooling system. The location of the thermostat housing varies depending on the engine type. Follow the upper radiator hose to the engine for the 3.6L engine and the 5.7L and 6.4L Hemi engine. For the 3.7L V6 and 4.7L V8 engines, follow the lower radiator hose to the engine. For the diesel engine, follow the upper radiator hose to the engine. Remove the necessary components to access the thermostat housing. Squeeze the tabs on the hose clamp to loosen it and detach the hose(s) from the thermostat housing. If the hose is stuck, twist it with adjustable pliers to break the seal. Remove the thermostat housing from the engine and remove the thermostat. Install a new rubber gasket around the thermostat and insert it into the thermostat housing. Install the thermostat housing and bolts onto the engine, then reattach the hose(s) and tighten the hose clamp(s) securely. Refill the cooling system, start the engine, and check for leaks and proper thermostat operation.