Mechanics

TRANS AM

1987 Pontiac Firebird • V8 2WD Automatic • 209,000 miles

What could be makin a slow tapping noise in the motor left rear side and I smell anifreeze just every now and again
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Justin lewis
January 1, 2011.



The tapping may be a noisy valve lifter, you will have to get a cooling system pressure test done to help locate any external coolant leaks, start here.

Mark (mhpautos)

Mhpautos
Jan 1, 2011.
I agree about the pressure test, but the tapping if it's not in time (rythm)of the engine and more like a tinny rattle, could be either a heat shield on the conveter or pipes(exhaust), or a heat riser with a broken bi-metalic sprig, it's right at the bottom of the exhaust manifold and the top of the Y pipe.

Merlin2021
Jan 1, 2011.