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Joined: 15 Jul 2011
Posts: 81

PostPosted: Sun May 08, 2016 6:03 pm    Post subject: Wrong part fitted - does it matter Reply with quote

1978 911sc
Further to my post last week asking to borrow a fan pulley spanner, I ordered a new pulley and six pulley shims. Unfortunately I ordered the wrong part. I think I've ordered a pulley for a car with aircon. My car does have air con. It is about 2cm deeper. The section that holds the fan belt is identical to the old (worn) part. Can anyone tell me if there's a problem using the new pulley. It's on the car now and everything's working fine.

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Joined: 21 Mar 2015
Posts: 5535
Location: Brighton

PostPosted: Mon May 09, 2016 7:08 pm    Post subject: Reply with quote

lots of views .. no replys .. not my forte but some basics if it helps ..

belts must be perfectly aligned with each pully , if alternator pully sticks out further than old one then it wont align correctly which will wear the belt faster.

The belt should be pretty much flush with the top edge of the pully , if it sits too deep or too high in the pully it wont grip and again will wear faster.
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Joined: 19 Mar 2014
Posts: 3510
Location: Harrogate

PostPosted: Mon May 09, 2016 7:24 pm    Post subject: Reply with quote

Sorry, are you saying you ordered a pulley for a car WITH aircon and you DO NOT have a car with aircon?
2006 Cayman S PCCB's
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Joined: 06 Oct 2014
Posts: 502
Location: North Yorkshire

2011 Porsche Cayman 987

PostPosted: Mon May 09, 2016 7:30 pm    Post subject: Reply with quote

I agree with Demort. If the alignment of the alternator belt is the same on both the pulley you took off and the new one, you should be OK. The redundant part will not make any difference. You could simply get a machine shop to remove the excess.
2015 Cayman GTS. No more PDK but still red.
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