1987 PONTIAC TRANS AM

  • Tiny
  • justin lewis
  • 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

Saturday, January 1st, 2011 AT 2:48 AM

2 Answers

  • Tiny
  • mhpautos
  • Expert
  • 29,857 posts

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)

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Saturday, January 1st, 2011 AT 3:45 AM
  • Tiny
  • merlin2021
  • Expert
  • 17,583 posts

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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Saturday, January 1st, 2011 AT 4:46 AM

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