The thermostat on the Isuzu Rodeo is closed when you first start your engine. This happens so that the engine can heat up more quickly. When the engine reaches operating temperature, the thermostat will open to allow coolant through the entire engine. You know your thermostat is going bad if the Rodeo begins to overheat, or if you are unable to get heat inside the car. It only takes a few minutes to replace the thermostat and you can do it in the driveway. The engine must be cool to complete this project.
Instructions
- 1
Disconnect the negative battery cable using a wrench to loosen the nut. Open the drain valve on the bottom of the radiator with a wrench and drain the coolant into the drain pan.
2Disconnect the upper radiator hose from the thermostat housing using a screwdriver to loosen the clamp. Remove the thermostat housing from the engine block using a socket and ratchet to loosen the bolts.
3Clean any remaining gasket material from the mounting surface with the scraper. Remove the thermostat from the engine.
4Insert the new thermostat with the spring end inside the engine. Place a new gasket and the thermostat housing on the mounting surface. Tighten the bolts with the socket and ratchet. Attach the radiator hose and tighten the clamp with the screwdriver.
5Add engine coolant to the radiator and the reservoir. Reconnect the battery cable and tighten the nut with the wrench.
