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Besides the water pump what else on 1998 Audi A4 could be causing overheating?

May 13th, 2012 · No Comments

- Water pumps rarely cause overheating. A water pump is just a shaft, bearing, and impeller, and for it to cause overheating the impeller would have to come loose or break, which is pretty rare. Failures are usually related to the bearing wearing out and causing a leak or causing the shaft/pulley to break loose. It’s much more likely that there is a problem with the thermostat, radiator, etc, or that coolant is low due to a leak.

- I’ll try to break it down in % numbers to give a wider point of view. There are three systems through which the engine gets rid of heat and each one acounts to 30%. First the cooling system which includes the radiator, water pump. thermostat , hoses and anything related to coolant. The exhaust system which contains the catalytic converter and its a common problem on imports specially honda and toyota when it pluggs up. The other 30% is taken care of by the lubrication system which includes de oil and the oil pump; as oil moves through the engine it not only lubricates but also cools down moving parts that heat up from the friction. The 10% of heat that is left in the engine is used by the fuel injection system sensors and is also what you see on your temperature gauge. If one of this systems fails overheating takes place and is up to a good mechanic to identify where the problem is.

- Have the radiator checked, sometimes they can get blocked and therefore directly block ventilation that keeps the engine cool. I’m not a mechanic or even know much about the inner workings of cars, but mine had this same problem and a new radiator was the solution.

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