Before learning how to fix your engine’s thermostat, you must first know what it is and does. It’s a valve in your cooling system that opens and closes. Your car’s thermostat is vital in keeping your engine running safely. It works to maintain the proper temperature for the engine by ensuring coolant is used when necessary.
Coolant prevents your engine from overheating and causing many more issues. It is very important you keep a close eye on your thermostat to catch any problems before it is too late.
One of the most obvious indicators of a problem with the thermostat will be found on the dashboard gauge. The gauge temperature could remain high for an extended period of time, which would indicate that your engine is running too hot.
If your thermostat gauge is erratic, such as it’s high then low then average, the gauge could be faulty or your engine could be reacting to extreme temperatures due to several reasons. If you notice something wrong with the thermostat, pull your car over and give it time to cool down. You may even want a tow to your nearest trusted Mercedes service center.
One of the next things you should look for is any leaks under the car to source out if you have a coolant leak. The color of coolant is usually bright, likely a shade of green or pink, and it will have a sweet smell to it. Leaking coolant will make it easier for the engine to overheat and break down. Not only that, but you could run out of coolant completely and your engine can seize. Without coolant, the parts in your engine can melt and warp. Your engine could need an entire rebuild or you might even need a new Mercedes if the damage is too catastrophic.
If you do not see any leaks, you can look at the thermostat valve, directly. You will find it under the hood of your car between the engine and radiator hose. The valve could be open or closed, each indicating something completely different. If it’s stuck open, this means coolant never stops entering the radiator, which would overcool the engine. If that occurs, your car will use more fuel, release more emissions, and could damage engine parts.
On the other hand, the valve could be stuck closed. If it’s unable to open, the coolant cannot reach the radiator. As we’ve already discussed, lack of coolant can cause your car to overheat and become destroyed.
As stated earlier, the first thing to do is pull over and give it a break. Let the car cool down as you figure out how you’re going to deal with the problem. While going to a shop isn’t your only option, it’s certainly the best one. If you’re familiar with cars, and have experience working on them, perhaps you can replace the thermostat yourself. Otherwise, this issue poses too many risks to be done improperly. Please do not attempt the method below if you are not 100% capable.
You want to start by locating the thermostat, again, located between the radiator hose and engine. The first step to take is to pull out the drain plug, allowing the coolant to drain properly. Then loosen the clamp on the hose, take off the bolts, and unplug the connector from the sensor. Once that is completed, remove the thermostat from the engine block and install your new one in reverse order. Once you’ve tightened the bolts and connected the radiator hose, don’t forget to add the coolant.
Here at Euro Plus Automotive, we are extremely dedicated to helping with whatever problems your car is facing. We’ve been open since 1984 with over 30 years of experience working on both German and Japanese vehicles. Our employees are ASE certified technicians who are trained to work on your specific make and model. This means only a brand expert would be working on your Mercedes, ensuring the best possible repairs and service at an affordable rate.
If you’re in need of services, call or stop by Euro Plus Automotive. We are located in Canoga Park, Woodland Hills, San Fernando Valley in Los Angeles County, CA. Put your trust in us, and we can help you prevent further problems with your Mercedes.