Question about 2000 Pontiac Montana

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My Pontiac Montana has 110,000 miles on it. When should I replace the water pump?

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Change it when it fails, which cold be 'never'. The most common water pump failure mode is when they begin to leak from the front pulley shaft seal. The leak is often slow at the beginning leaving a little drip on the pump's 'chin' when the car warms up, but so little that when the engine is fully hot it evaporates the water that leaks out. The deterioration of the pump is gradual topping up the coolant reservoir will keep you running for some while until you can arrange to swap out the pump. One preventative measure you should consider is to give the interior of your throttle body an annual clean out. It costs nothing and it improves engine performance, gas milage and longevity.

Posted on Sep 16, 2010

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If it's the original factory pump, you are way past the expected life span. But, if it isn't making any noise and isn't leaking, you can either leave it as is or change it when you have the time. Exception to that would be if you are planning on a long trip cross country etc. In that case, I'd replace it before leaving just to eliminate any surprises.

Posted on Sep 16, 2010

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