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1987 Pontiac Firebird

Tiny

justin lewis

January, 1, 2011 AT 2:48 AM

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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2 Answers

Tiny

mhpautos

January, 1, 2011 AT 3:45 AM

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)

Tiny

merlin2021

January, 1, 2011 AT 4:46 AM

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.

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