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Old 10-17-2025, 02:30 PM
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Default 67 BB Camaro 3 groove cast crank pulley pic
Recently Anthony has had some two and three groove 67 BB cast iron crank pulleys for sale and I ask him if he’d like me to post this picture of my three groove pulley set up on my 67 car.
Some people don’t understand why some cars use a two groove and others a three groove. Hope this picture is helpful to someone.
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Old 10-17-2025, 02:50 PM
66cayne 66cayne is offline
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I've always understood it to be alt, water pump, power steering if using all 3 grooves on the balancer pulley are used...
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Old 10-17-2025, 03:34 PM
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From the block out,
1st groove- Alt n water pump
Center groove- water pump only
Third groove- power steering
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Old 10-17-2025, 03:53 PM
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A
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Old 10-20-2025, 04:02 AM
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Quote:
Originally Posted by 1967 4K View Post
Center groove- water pump only
How does that work? No adjuster to install it and no way to tension it.
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Old 10-20-2025, 01:23 PM
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Kurt, a few trips to the NAPA store to get one the right size. Take the two groove water pump pulley off put the belt in the grooves then back on the pump n line up everything. Kinda PITA.
Not sure what GM’s thinking was there but if I break an alt belt I can still get back home because the water pump is driven by the center belt. Hope my battery holds charge that long. LOL 😆
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Old 10-17-2025, 04:05 PM
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For "Factory Belt Routing" See your:
AIM (1967/1968/1969)
UPC 6
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Last edited by 169indy; 10-17-2025 at 07:39 PM. Reason: I should have discussed the Pulley in question
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Old 10-17-2025, 05:29 PM
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3 groove is for power steering
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Old 10-17-2025, 06:12 PM
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don't forget there was also smog on LA cars
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Old 10-18-2025, 12:28 PM
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Was the power steering groove lined up with the smog pulley?
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