18
Feb
How to replace a faulty car thermostat. In this video Ill show you how to change a car thermostat on a Jeep cherokee 40L I6 engine although all jeep straight six engines will be the same and many.
Remove the Thermostat Housing.
Changing thermostat in car. Place the thermostat into the engine. The deeper spring-side end goes into the engine while the shorter end sits in the housing. If there is a tab it goes through a slot in the thermostat flange.
If the thermostat doesnt sit flat its incorrectly installed. Put the thermostat in the engine flange so the valve points up. Inspect your new thermostat to find the pointed valve on top and the spring on the bottom.
Slide the thermostat into the port on your engine and push it in tightly. Make sure the thermostats ring fits perfectly in the port or else coolant will be able to leak through. 5 Remove the bolts that hold the thermostat housing in place and lift out the old thermostat.
Compare the new thermostat and its gasket with the old ones. If the new thermostat and the gasket thats included with it arent exactly like the old ones go back to the store for the right ones. Access to the Thermostat Housing.
Use the Appropriate Tool. Remove the Thermostat Housing. Clean the Mating Surfaces.
Get a New Thermostat. Use the Appropriate Seal. Install the New Thermostat.
A Systematic Approach to Car Thermostat Replacement. Place the new car thermostat in the recessed groove in either the engine or gooseneck air bleed toward the top. Hold it in place with a self-adhesive gasket.
Then apply a bead of RTV sealant. In most cases the cause of an overheating or no-heat condition in your vehicle is a faulty thermostat. Loosen the top hose clip then ease off the hose.
Partially drain the cooling system first. With a normal top-mounted thermostat you need drain only part of the cooling system. Do not drain it while the engine is hot you may be scalded.
Wait for the engine to cool. All thermostats eventually fail. Therefore if the cooling system is already open for major repairs such as water pump or radiator replacement it is recommended to install a new thermostat simply as insurance against future breakdown.
Opportune Times To Replace A Thermostat. As we mentioned before automakers shy away from prescribing a set time or mileage to replace a thermostat. We tend to agree that thermostats normally last a long time and so replacing them too soon might not be the best use of your hard-earned car parts money.
How to replace a faulty car thermostat. Depending on the engine model this might be difficult for some people. Most often than not though this part is located in close vicinity to the cars water pump on the cylinder head.
CARSCOM A car thermostat is responsible for preventing your engine from overheating. Unless an engine overheats or fails to reach normal operating temperature after being driven for several. Remove the thermostat after disconnecting the thermostat housing from the engine.
The thermostat housing is the blocky metal piece connected to your engine block that the hose was attached to. Use a socket wrench to loosen the bolts holding the housing in place and set them aside so you dont lose them. Replacing a car thermostat includes the draining and refilling of your vehicles cooling system so you may also consider performing a cooling system flush while you are replacing the thermostat.
Flushing the cooling system of your car can help remove the buildup and deposits that have formed overtime due to normal use of your vehicle. If both test points remain at about the same low temperature your car thermostat is stuck opened. This means the coolant is flowing continuously keeping the engine from reaching operating temperature.
This will confirm the continuously low temperature reading of the temperature gauge on your dashboard. The thermostat should open at approximately 195 degrees in your Lexus. Feel the top radiator hose it will be cool to moderatly warm until the thermostat opens at which time the top and bottom hose at the radiator will both be warm.
The first step necessary to replace a car thermostat is to gain access to it. Lift the hood and ensure that it is secured so that there is no risk of it dropping and causing injury. This will enable you to locate the thermostat.
While wearing a thick pair of gloves put a rag over the radiator cap. In this video Ill show you how to change a car thermostat on a Jeep cherokee 40L I6 engine although all jeep straight six engines will be the same and many.