Install automotive thermostat


















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Sudoku Play Now. Word Search Play Now. Follow us on. Living and entertainment iDiva MensXP. All rights reserved. If you know your car thermostat has failed, go ahead and change it using these tips.

However, if you don't know whether the thermostat is bad, check this other article about troubleshooting the thermostat. A stuck thermostat can overheat and seriously damage your car engine. Photo courtesy of Slava on Flickr. The best way to go about your repair job—if this is your first time replacing a car thermostat—is to use the service manual for your particular vehicle make and model.

However, the next ten tips may be sufficient to replace the thermostat in many models, since the unit is readily accessible, and you may not need to remove components, except some parts from the air cleaner assembly. If you still need some help, though, the manual provides a step by step procedure to replace the thermostat for your specific model, how to deal with components that might block access to the thermostat housing, torque specifications, and the bleeding process for your vehicle, if necessary.

Buy an inexpensive, aftermarket copy online like this Haynes manual , from Amazon. It comes with many step-by-step procedures for many maintenance, troubleshooting, and replacement tasks that will help you in the future.

So the manual pays for itself in a few days. Following your service manual, pay attention to the next important tips to avoid potential repair problems associated with car thermostat replacement. Make sure the engine is cool before you start replacing the thermostat. Wait for the radiator and engine to cool before attempting to replace the thermostat.

When hot, the cooling system is under pressure and you'll seriously burn yourself unintentionally by releasing a gush of hot or boiling coolant. Drain about two quarts of coolant using the radiator drain valve before disconnecting the upper radiator hose from the thermostat shell.

This will bring the coolant level to below the thermostat housing and prevent coolant from splashing over belts and other components after separating the upper radiator hose. Disconnect the upper radiator hose from the thermostat housing. To locate the thermostat housing:. Use a line wrench or six-point socket tool to prevent damage to bolts. Photo courtesy of Gamsbart on Wikimedia. Use a six-point wrench or six-point socket of the correct size when removing the two or three housing mounting bolts.

Using a six-point tool will avoid rounding off the bolts' heads. When trying to lift the thermostat housing, if you notice it doesn't move, lightly tap it with a rubber mallet or screwdriver's plastic handle.

Carefully lift the thermostat housing away from the engine. Before removing the thermostat, pay attention to the way the thermostat aligns inside the housing. After removing the thermostat, cover the thermostat opening on the engine with a clean rag to prevent sealant or gasket material from going into the engine.

Make sure the new thermostat aligns perfectly inside before tightening the mounting bolts. Photo courtesy of Joe Goldberg on Flickr. When buying the new thermostat, get one with the same temperature rating your car manufacturer specifies for your vehicle. You'll find this information in your vehicle service manual. Most new thermostats come with their own gaskets or rubber seal, but not all. So check that your new thermostat includes one; otherwise, buy one. Compare the new thermostat to the old one.

Then, position the new one in place along with its seal, and tighten the housing bolts using a torque wrench. A car thermostat replacement job is within the reach of the average car owner. You don't need special skills or tools. And you can do it in your own garage.

But it doesn't mean that nothing could go wrong. The little details will get you in trouble when you don't know or forget about them. Doing a hit-or-miss repair job or following the wrong procedure will result in a much more expensive job than taking your car to the repair shop in the first place. If in doubt, consult the vehicle repair manual for your particular car make and model. The ten tips described here point out the most common details you are most likely to miss and get you in trouble when replacing your car thermostat.

So keep these tips handy and consult them as necessary. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

Question: Can you replace the thermostat without noticing that the housing is leaking and needs to be replaced? Answer: It may be possible if the leak is small and hidden from view.

If this is a gasket issue, it'll be fixed when you correctly installed the new one. If the housing is cracked, the leak probably will return. Question: Can I use the same rubber from my old thermostat on my new thermostat? Answer: It's better to replace it. They also wear from the heat and eventually fail.

Question: I have put a new thermostat and housing but now the fan kicks in after a while and never stops running. What could be the problem? Answer: The thermostat might be sticking closed or partially open. Check the temperature gauge when the fan kicks in and see if there are any movement of the gauge after a while.

This other post may help you do a little diagnostic:. Question: I changed my car thermostat, and now it overheats. This only happens when the engine is cool, and you drive like one or two miles. Once it overheats, I just loosen the radiator cap, and the car goes back to normal. Answer: There could be air trapped in the system. Sometimes it is necessary to purge the thermostat system more than once.

Question: I got my car thermostat replaced and had to fill the coolant three times. Is that normal? Answer: It is possible. When you first install the thermostat, it is closed. Then you try to top off the system, but there remain some air pockets that either you need to bleed or the system itself will 'burp', like in some newer cooling systems. Question: Do I apply the sealant for the thermostat replacement towards the motor? Answer: Yes, make sure the gasket is properly centered.

Some gaskets come with an adhesive backing that will hold the thermostat in place, as well. Answer: Maybe not.



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