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Engine Pulleys Dont line UP

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Old Jan 30, 2006 | 11:24 PM
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Default Engine Pulleys Dont line UP

Ive been putting a small block together and I am down to putting the waterpump and pulleys on. Ive got a Corvette water pump on and the corvette pulleys on but the crank pulley is further back (closer to the engine) and the waterpump pulley is to far away from the engine. The belts dont line up. Both pulleys are 3 groove. Anybody got and ideas on what the issue is? Thanks
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Old Jan 31, 2006 | 12:48 AM
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Is the crank pulley torqued down enough? I think spec is 80ft lbs. Did you hammer the damper on the crank far enough?
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Old Jan 31, 2006 | 12:52 AM
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Originally Posted by torqvette
Did you hammer the damper on the crank far enough?

I think he stated the crank pulley (harmonic balancer) is "already" further back.
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Old Jan 31, 2006 | 02:32 AM
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Originally Posted by Jclgodale3

I think he stated the crank pulley (harmonic balancer) is "already" further back.
Woops, read too fast. Are all of the pulleys installed facing the right direction? ...running out of ideas.

Last edited by enkeivette; Jan 31, 2006 at 05:04 AM.
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Old Jan 31, 2006 | 03:33 AM
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Compare your old water pump to your new one....
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Old Jan 31, 2006 | 03:39 AM
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you do have a short water pump right? it should have no gap between the timing chain and the back of the water pump
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Old Jan 31, 2006 | 06:03 AM
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My suspicion is that your "CORVETTE" water pump is a long pump and not the short one you need.

Chris B
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Old Jan 31, 2006 | 11:01 AM
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Originally Posted by fl_rider
My suspicion is that your "CORVETTE" water pump is a long pump and not the short one you need.

Chris B

That would be my suspicion too. Ill check it out I dont have the old pump to compare . But these are the original pulleys. The water pump is all the way back against the timing cover. I will go make sure that the pump is the right one. Any other ideas if that is correct?
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Old Jan 31, 2006 | 11:08 AM
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Might not be the route you want to go, but I had an alumninum spacer made to fit between the balancer and the pulley so the belts would line up on my "custom" project. Works perfect. If your interested I'll give you the forum member's name who can machine it for you.
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Old Jan 31, 2006 | 11:34 AM
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if the back of the water pump is all the way against the timing chain cover it would seem you have the correct water pump
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Old Jan 31, 2006 | 11:14 PM
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How much are they off? If just sleightly, it doesn't matter. That's the beauty of obsolete technolgy (v belts ). They work when things are not peferect. Can you shim to correct?
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Old Feb 1, 2006 | 10:38 AM
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Hvymtlc5 has it right. I had the same problem and had an aluminim spacer made. No more alignment problem.
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Old Feb 1, 2006 | 10:47 AM
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Default Mr Gasket

Same problem with my aftermarket Alum. water pump install. Summit has a set of shims with the correct holes, made Mr Gasket. Worked for me, was only off by 1/4".
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Old Feb 1, 2006 | 04:39 PM
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Default adjust hub

I have had the same problem with my '69. After ruining water pump bearings on two brand new water pumps, I realized that misalignment makes a difference. If the water pump pulleys are too close to the engine, use the Summit spacers. If the hub is farther away from the engine than is the crank pulley, I think the water pump hub can be pressed farther onto the pump shaft the appropriate amount so that the crank and water pump pulleys are aligned.
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