Jampollock

On my 1988 f150 when you start it up th fan belt makes a hell of a noise squelling noise, what would cause this? I have changed the belt & it still does it. Does the tensioner need to be slackened or tightened more.
The noise does go away but only after revving the truck for a minute or two. Not very good in the quiet neighbourhood.
Help please

sylver91

Chances are the tensioner needs to be replaced, but to test it, pour water on the spinning belt, if it stops squeaking but comes back, the belt is too loose. If it keeps squeaking after you poor water on it, the problem is somewhere on the pullies

Jampollock

Hi How do you tighten the belt
What bit do I tighten?

Thanks

sylver91

The tensioner tightens the belt, its a spring that keep tension so nothing slips or squeals but they get worn out over time.

Jampollock

Thanks new tensioner it is then