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IF IT'S COMEING FROM THE ENGINE, SOUNDS LIKE IT'S TIME FOR A ENGINE REBILD. A LOT OF THINGS CAN MAKE THAT NOISE,CHECK FOR LOSE BOLTS ON ANYTHING THAT MOVES, EVEN THE TORQUE CONVERTOR.

There are many problems that can cause loud noises, and what sounds like knocking to one person may be described as something else by another.

Loud, regular noises can be caused by a leaky exhaust manifold gasket, broken sparkplug, warped head and/or leaking headgasket, faulty EGR valve, burned valve and fuel injectors and a whole list of other problems. If you are having trouble figuring out the problem you need to have an experienced mechanic tell you what's wrong and if you doubt his explanation, take it to someone else for a second opinion.

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