![]() We carry the right coolant for nearly any vehicle, and also offer helpful How-To topics on cooling system maintenance, how to flush and refill your car's coolant, and much more to get the job done right. ![]() When you need coolant, or if you need radiator hoses, clamps, or the right tools for the job, shop O'Reilly Auto Parts. So I don't know much about the engine other than it was replaced from the original. My 95 has a 3 cyl engine, that from the looks of things was from a 96+. If your coolant levels are low or if your cooling system isn't working as it should, you may notice your temperature gauge reading higher than usual, your heater may stop working, or you might notice steam coming from under your hood. Time to blow the dust off of the work on the 95 Firefly. It's a good idea to fix a cooling system leak as soon as possible to avoid damage to your engine that can include overheating, seizing, warped cylinder heads, or a blown head gasket. If you notice a coolant leak, you should inspect your cooling system's components for signs of wear, cracks, damage, and attempt to locate the source of the leaks. Your vehicle's owner's manual usually includes service intervals that indicate how often to flush and fill your car's coolant, and coolant levels and condition should be inspected at least at every oil change and before winter to ensure safe engine performance. Regularly checking and filling fluids is part of routine car maintenance, and not only does this help your vehicle perform better, but it also protects the engine from damage and corrosion. Antifreeze also helps prevent concentrations of water from causing corrosion and scale buildup inside the engine and keep your cooling system from freezing, which could cause extensive damage. Using the upper and lower radiator hoses, coolant is circulated throughout your car's engine and to the radiator where the hot coolant's temperature is reduced before it is returned to the engine. Your engine coolant, also called antifreeze, helps your vehicle maintain an appropriate operating temperature by absorbing heat from your engine. ![]() However, the logical side of my brain keeps telling me that those temps are too low for optimal mpg’s.Maintain A Healthy Cooling System With Quality Antifreeze Those are very good numbers from a ‘twin cam’ Saturn so it’s hard for me to believe that the coolant temps are costing me much. Also, the configurations and number of sensors used to perform the same engine functions based on engine coolant temperature changed over. The thing is, I consistently get 40-41mpg in warmer weather and it’s been 37-39 since winter set in. Discussing or attempting to order any sensor or switch related to engine coolant temp can be frustrating, in part because the terminology can be 'too' similar' sounding and create confusion. The gauge has read exactly the same since I bought the car a couple years ago, I just never monitored it until now. It shows none of the classic signs of a stuck T-Stat either the car warms up fast (faster than any other car I own actually) and the engine temps are rock solid stable in freezing cold or blazing heat. No dice, the temps are exactly the same, to the degree, with the new sensor. I figured it had to be reading incorrectly. Seeing this I decided to go ahead and change the coolant temp sensor since S-series cars are known for crappy temp sensors and a new was is only $9 (man I love how cheap parts for this car are! ). What I found is that at full operating temps my car was running between 154-158deg ECT. I can’t help but wonder if it’s costing me mpg’s, although the car really gets excellent mileage seemingly ‘in spite of’ the odd coolant temps.Ī week or 2 ago I decided to hook up my scanner and monitor a few things to try and track down a high idle speed issue that’s recently popped up. By “running” I mean fully up to temp, ‘normal’ operating conditions. I drive a 2002 Saturn SL2 and I’ve noticed a bit of an odd condition with it the running coolant temps seem very low.
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