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Registered
Join Date: Mar 2010
Posts: 197
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altenator belt adjustment
What is the correct delflection for the altenator belt on my 2.8 race motor?
I've got three "how to" books, Two of them (early 911) say 10-15 mm and the other ( 1984-1989 carrera)) says 5mm. Did this dimension change via evalution of the motor? Thanks, Tom B. |
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08-17-2011, 06:20 AM
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5String
Join Date: Apr 2010
Location: SoCal, USA
Posts: 1,225
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If you can grab the belt midway between the two pulleys and twist it 180 degrees, it's just about right.
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5String Tell not a soul that you have seen me; breathe not a word of what I say.... The Northwest Files |
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08-17-2011, 06:33 AM
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Registered
Join Date: Sep 2001
Location: Columbus, OH
Posts: 1,011
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5mm seems awful tight. All that tension is pulling on your alternator bearings. Given that the distance between the crank pulley and the alternator pulley should be pretty similar with 2.7-3.2, I would go with the 10-15mm (1/2 inch)
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Doug 79 SC Targa w/ ITBs, 2004 Cayenne Turbo |
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08-17-2011, 07:05 AM
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Registered
Join Date: Mar 2010
Posts: 197
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Quote:
I was in the 10-12mm range starting out and that seemed OK , but I took out one of the three shims now its kinda too tight. Rather than risk an altenator bearing I'll go back to three shims. Thanks for the input. |
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08-17-2011, 07:41 AM
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