Repeated Alternator Drive Belt Failure
28 September 2008, 03:29 PM
#1
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Repeated Alternator Drive Belt Failure
As title: any ideas as to why? This is on a 944 track day car. It uses a five run belt and so far its shredded two in two thousand miles. Everything is lined up correctly, there are no obvious marks on the drive pulley nor on the alternator pulley: and the belts were both from an oem manufacturer...
28 September 2008, 04:29 PM
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It is my car yes, but its difficult to see, let alone photograph. The first belt was fitted by an experience Porsche fitter and the replacement by an AA patrol, who left it slightly too slack. As over tension doesnt seem to be the issue then Im stumped.
28 September 2008, 05:14 PM
#4
Something is cutting the belt . Maybe a good idea to take the belt off and check the vee's for a rough edge's , I take it the belt has worn in the same place both times?
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28 September 2008, 07:06 PM
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Mmmm, trackday car..... does it get over-revved much..... i saw a belt simply stretch due to the speed it was spinning at one day... just a thought.... if it is something like that, then i would suggest you tension the belts a bit more than just tight.....
28 September 2008, 08:40 PM
#10
sorry but i'm stumped ..
it is either
overtightened.
getting too hot - for some reason
has something on the crank or alternator pulley cutting into it
Well, thats what I can think off anyway , if anyone else has any other ideas for this chap
If anything needs to be done to the pulleys just give me a shout
it is either
overtightened.
getting too hot - for some reason
has something on the crank or alternator pulley cutting into it
Well, thats what I can think off anyway , if anyone else has any other ideas for this chap
If anything needs to be done to the pulleys just give me a shout
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