2000 chevy impala ls

2000 CHEVROLET IMPALA
83,000 MILES • 6 CYL • FWD • AUTOMATIC
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DONNA NACINOVICH
  • MEMBER
  • 1 POST
CAR HAS A HUMMING SQUEAKING SOUND WHEN STARTING UP. SEEMS TO DIE DOWN AFTER CAR WARMS. FOR NOTICABLE NOW EVEN AFTER CAR IS WARMED. WHAT MIGHT THIS BE.
Jan 3, 2011 at 5:30 PM
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OBXAUTOMEDIC
  • ✓ASE Certified Mechanic
  • 3,711 POSTS
  • ASE Certified Mechanic
Hello,

Here are a couple possibilities....

Worn Belt

Bearing in Idler and/or Tension Pulleys

or

Bearing in Alternator, Power Steering, A/C Clutch

To test the bearings in the pulleys....

With Spray Lube in Hand and Engine Off locate the Idler and Tensioner Pulleys. Spray ONE of the pulleys at the center bolt, Start engine if noise is gone for short period of time replace pulley. Repeat process for each pulley. For the Alternator and Power Steering spray behind the pulley and for the A/C Clutch spray center bolt and as best you can behind pulley.

.
Jan 3, 2011 at 6:12 PM
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