Help , V -Belt issues - wrong crank pulley?
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Instructor
Joined: Sep 2007
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Help , V -Belt issues - wrong crank pulley?
Hey, Im trying to run my v belts but I think i have the wrong crank pulley. The crank pulley is 3 groove and sticks out a bit off the harmonic balancer, doesnt match up that well and im not sure what it originated from. My alternator is moved back to the driver side with correct mount and only lines up with the rear water pump pulley, lining up behind the crank pulley to no where land. The power steering pulley wants to line up with the middle groove on the crank pulley. Nothing lines up with the 3rd groove on crank pulley ( front most groove) It too far forward. So What can fix this problem It looks like I need a 3 groove like on my first gen camaro. Its a 2 piece , 3 groove pulley... is that what this calls for???
Correct me if im wrong but the alternator belt is supposed to go around the rear most crank groove and rear most WP groove. The power steering is supposed to go just around the crank pulley (front most) and that leaves the middle crank groove open for the AC that is now delete? The PS doesnt line up at all with the water pump pulley as it is too far forward... That's why im assuming it only goes around the crank. Any help is greatly appreciated, I wish things could just sail smooth but oh well... !
Correct me if im wrong but the alternator belt is supposed to go around the rear most crank groove and rear most WP groove. The power steering is supposed to go just around the crank pulley (front most) and that leaves the middle crank groove open for the AC that is now delete? The PS doesnt line up at all with the water pump pulley as it is too far forward... That's why im assuming it only goes around the crank. Any help is greatly appreciated, I wish things could just sail smooth but oh well... !
Last edited by yellowC3; Jun 19, 2013 at 10:05 PM.
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas
Hello again Corvette forum ! You guys have helped me a long way but now Im finishing up and found this bug... I'm just trying to run the alternator, water pump and power steering. Correct me if Im wrong but the alternator belt goes around the crank and water pump (2 groove WP pulley) and obviously the alternator. The power steering pump goes around the crank and 2nd (front ) groove on the water pump. I have a 3 groove crank pulley that sits out a bit and doesn't look right.
If I get a stubby 2 groove crank pulley should i be all set?
(just posted, uploading photo in a minute)
Thanks !!
If I get a stubby 2 groove crank pulley should i be all set?
(just posted, uploading photo in a minute)
Thanks !!
If your power steering pulley is the correct one to use with the 2nd groove, you might be able to just remove the extra (3rd) pulley from the crank (reverse of what I had to do).
DC
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas
Check the bolts on the crank pulleys. It looks like that 3rd pulley is out a bit too far.
DC
Last edited by DC3; Jun 19, 2013 at 10:46 PM.
Melting Slicks
Joined: Apr 2001
Posts: 2,030
Likes: 363
From: Lubbock Texas
I posted before I saw your 2nd photo but I'm not sure what to add. With the dashed lines, it makes it look like the crank pulley is too far forward. Except for that, it doesn't look too different from my '73.
DC
DC
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Melting Slicks
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From: Lubbock Texas
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Le Mans Master
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OK, I'll admit it. I cheated. I just did a BB swap into a 53 Chevy and the owner got a short water pump and had long pump pulleys.
Pro
Joined: Nov 2012
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From: Chesapeake Virginia
in fact, now that i look at it closer, I think the water pump pulleys are wrong too, on my car, the water pump pulley is one piece and both belt groves are the same diameter, maybe you have something switch around between the crank and water pump
Thread Starter
Instructor
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Hey, no kidding , i just went ahead and ordered a billet 3 groove crank pulley. I also figured out , i dont even need the 2 groove waterpump pulley since the middle groove on the crank wont be used and i deleted a/c. Just going with aftermarket stuff here.
Thread Starter
Instructor
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Sounds like a good idea ,so find one a little tight and force it on- or walk it on with the pulley? have a part # by chance? Thanks
Le Mans Master
Joined: Oct 2006
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From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
If the belt is correct, you'll have to remove the water pump pulley and then place the belt in the correct groove, and reinstall the pulley. If the belt is too short, it'll eat the water pump bearings, too long and it'll flop around. Trick is to get 1/2 to 3/4 deflection in the middle of the run. May take a couple of trips to the parts store to get it right. The AIM will have the factory p/n so you might be able to cross it from that- provided you still have the factory pulleys.