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Makes a little grinding noise

Tiny
RAY9191
  • MEMBER
  • 1998 PONTIAC BONNEVILLE
  • 240,000 MILES
My 1998 pontiac bonneville makes a little grind noise only when I rev it up high so I took the engine cover off and show a little leak by my head gasket and I put my hand on the head gasket cover and every time I heard that noise I felt something hit the belt and pulley looks fine we put 134a refrigerant with oil in the a/c to recharge it becuase we thought the bearing didnt have enough oil
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Saturday, January 14th, 2012 AT 4:28 PM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 4,159 POSTS
Adding oil to the compressor does nothing for the pulley bearing, if that is what you were hoping to achieve. If you have a grinding noise, try removing the belt and running it to try and duplicate the symptom, not for too long or overheat/battery discharge will occur. Spin each pulley by hand and try to differentiate which accessory is making noise.
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Saturday, January 14th, 2012 AT 4:46 PM

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