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1990 Ford F-150 squealing engine

Tiny
ROBBIE4413
  • MEMBER
  • 1990 FORD F-150
  • 4.9L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 180,000 MILES
Hi I have a 1990 f150 xlt lariat 4.9 L. My engine squeals upon startup and gets worse if I turn on the ac when the engine is warming up. After that its fine. The power steering pump pulley has some give to it though. About 1/16". When the engine is running it doesnt seem to wobble at all. Have replaced the belt and the tensioner w pulley. Cleaned all the pulleys as well. Trying to fix this terrible sound and need help! It would be much appreciated my friend.
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Monday, August 4th, 2014 AT 11:10 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Use a straight edge and check alignment of belt if the pump wobbles with the belt off see why a bent pulley can make the belt go bad and then check for oil on pulleys if any clean it all off and stop where it is coming from.
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Monday, August 4th, 2014 AT 12:35 PM

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