my car is making a knocking noise what could it be on 2001 Chevrolet Impala

i have a 2001 ls impala and had the heads and transmisson repair after the transmisson a knocking noise started

by in Los Angeles, CA on July 13, 2012
0 answers
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when i started my car this morning it instantly starting makeing a loud ticking noise from the motor(loud enough i could hear it from inside the car), i let it warm up and still no change in the no...