why does engine make a grinding noise on 2007 Pontiac Grand Prix

When the gas is pressed down th eengine makes a grinding niose

by in Santa Fe, NM on February 11, 2011
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1 answer
ANSWER by , February 12, 2011
Your engine mounts may be broken. Without functioning engine mounts, the engine will rest onto the frame of the vehicle causing the grinding noise whenever you accelerate because of the engine shaking around on the frame.