Pulley size help

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Jul 9, 2007 | 09:03 AM

lil_red_devil

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From: London, UK

Pulley size help

Hi,

Can anyone tell me what the stock sizes for crankshaft, waterpump power steering and alternator are?

I have no a/c (been removed by previous owner). One belt is running crankshaft / power steering. The other belt is running crankshaft, water pump and alternator.

I am having "issues" with the upgrade of my alternator from SI to CS144. Current belt won't go on as the alternator swings up and hits my tall valve covers. Next size up belt is way too long, alternator swings back too far and makes the belt rub on the power steering pump shaft.

Current belt is 12.7mm wide by 10mm deep and outside diameter of 1400 mm (SPAX or XPA) cogged belt. Next size available is a 1432mm outside diameter which won't do.

Any ideas? I'm thinking maybe aftermarket pulleys are incorrect and possibly the reason why the old belt won't go on.

Thanks for any help

Jul 9, 2007 | 09:17 AM

Mikes*Corvettes

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Evo,
Just spoke to the other mike he told me of your problem.
why not come round and measure the pulleys on my 79,
also i have a few odd size belts one of them might fit.
mike.

Jul 9, 2007 | 07:17 PM

lil_red_devil

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From: London, UK

Quote:

Originally Posted by Dell Boy

Evo,
Just spoke to the other mike he told me of your problem.
why not come round and measure the pulleys on my 79,
also i have a few odd size belts one of them might fit.
mike.

mike. thanks for the pulley. unfortunately dont fit so it looks like a search for a belt continues. i guess another alternative is to fit new short valve covers.

anyone else have any ideas? measured the diameters of water pump and alternator pulleys, 156mm (6 1/4 inch) and 70mm (2 3/4 inch). I cant get to the crank pully as the 3rd groove (power steering) is smaller then the other 2 grooves and i couldnt take it off tonight.

this one has really got me

Jul 12, 2007 | 11:05 AM

Tonys96

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From: Rosemount MN

Have you tried to loosen the valve cover, fit the belt and adjust tension then put the valve cover back on.

Jul 12, 2007 | 11:43 AM

lil_red_devil

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Quote:

Originally Posted by Tonys96

Have you tried to loosen the valve cover, fit the belt and adjust tension then put the valve cover back on.

Hi Tonys96,

Tried that, took the cover right off got the belt as tight as I can but can't get the tall valve cover back on. Ordered a couple of cheapo short covers that would work with my original belt it seems.

At least I can get it going I guess until I find some nice ones

Thanks for your input

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