Question about 1999 Mazda Millenia

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I have a 2001 Millenia I recently purchased from a dealership. It had a loud whining belt noise that I was told it needed belt dressing for. That was wrong. I took the car to their mechanic who said it had some new belts already on it and he adjusted the water pump belt - this took care of the nosiee for a day & it was back. it then developed a knock or tap in the engine like it needed a tune up. i had the plugs changed (pregapped plugs) and the tap/knock seemed less. At that time i drove it about 30 miles and it started knocking louder. I took it to two different mechanics who said it was the water pump or something in the timing belt that needed to be replaced. I had a friend replace the water pump - they said the timing belt looked okay and so did the pulleys etc... but the knock is still there. There was a leak in the cold air intake hose that we patched as well. The noise appears to be coming from the area on the outer part of the motor of the passenger side of the engine or possibly near the plastic shroud. It seems to be one that you can't really pinpoint where it originates. The engine is idling extremely rough now bgut the knock is a lot less.

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Replaced the timing belt and Tensioner and it works great now.

Posted on Dec 20, 2008


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