altenator belt squealing when engine cold

[jumpinac]

have replaced it twice in 9000 miles still squealing ,waterpump and timing belt done the second time i replace other belt any ideas why its squealing

[Fergus]

It probably just needs to be tightened up a bit.

[jumpinac]

when i have u ,when reving her hard above 6.5k the lights dim,whats that likely to be

[Fergus]

If you have put in a new alternator belt, after a while it would need to be tightened up after it beds in.
If it's slipping then your battery will start to go flat, lights dimming etc.

[jumpinac]

all realated so thanks fergus as usual great help

[Fergus]

Don't tighten it up to much though or it will wear out faster.
The middle of the belt should have a 'deflection' (distance measured when you push the belt up and then down - it's the gap measured inbetween).
1989 - 1993 = 8.89mm to 9.90mm
1994 - later = 6.09mm to 7.36mm

Hope that helps

[jumpinac]

huge help thanks very much