Question: Temperature Gage on dashboard fluctuates a lot?
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Answer #1:
Check all of your engine hoses. You might have a leak or a problem with the hoses that is causing the fluid to leak or air to get into the fluid. Also check the level of fluid in your engine.Answer #2:
Oil change wont cause this issue. However your hoses might, please make sure they are secure when the car hasn't been running. Also there is a thermostat inside your radiator system, most likely inside one of the hoses.If that thermostat goes bad it won't be able to give your engine the correct amount of water at ANY given time which will cause just this kind of problem. With the right site you may be able to do it yourself otherwise get it to a mechanic or overheating your engine will do more expensive damage.
Answer #3:
check your hoses, you may have bent your radiator, this causes poor circulation in the cooling process of your engine. you could simply have a broken thermostat. which sounds most likely like your thermostat, also check your coolant resvoir. this is the container that holds your coolant aka anti-freeze, I recommend a mixture of 50-50 half water, have antifreeze. You must service or change your cars oil, if you like driving a car, you better change the oil. The oil problem isn't the cause of your temperature fluctuation, however if you don't change the oil it will eventually turn into sludge and seize up your motor. The oil keeps the car running, it essentially lubricates all the working components. Untill you fix your temerature fluctuation dilemna, I STRONGLY RECOMMEND keeping a jug of antifreeze in your car, so your engine doesnt overheat. Check all couplings on your hoses, the upper and lower radiator hoses etc. hope this helps =) also the fact that your temp. gauge moves, shows that it works and eliminates the gauge being broken** Powered by Yahoo Answers