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Old 12-26-2009, 07:03 AM
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Pulley Alignment on BBC

I need some ideas on how to get the pulleys to line up on my bbc build.

I have the short water pump (correct for bbc in a 67 Chevelle). Since I don't have PS, I decided to try the RH low mount kit from summit.

As you can see in the photos, the alternator pulley is about 1/2 inch behind the water pump pulley.

It looks like the water pump pulley is about right to line up with the crank pulley (which I haven't found yet). If I find a water pump pulley that is deeper so that it lines up with the alternator pulley it looks like it will put the belt up against the balancer.

I really don't want to buy one of those "complete" set ups for a serpentine system.

Any ideas?
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Old 12-26-2009, 08:17 AM
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Pulley Alignment on BBC

on your set up , i believe you need the pulley that fits close to balancer that goes in behind the bottom pulley and belt only goes around it and alternator .
old year cars had them , that way .
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Old 12-26-2009, 08:21 AM
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Not sure on a short pump
But on a long pump With aftermarket Alt, AC brackets (Driver side Alt, Pass side AC)

(my crank pulley had 3 grooves------WP pulley had 2 grooves)

The inside belt was dedicated to the power steering pump (factory 79 chevy pick-up brackets). Crank pulley---Power steering (2 groove pulley)


The middle belt was for the alternator (aftermarket brackets) and used the power steering for an idler. Crank, PS, ALT, WP

The belt closest to the radiator-----For the AC-----Crank--WP--AC
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Old 12-26-2009, 11:11 AM
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Your waterpump pulley looks to me like it is a small block pulley and not a big block pulley, or it is a long BBC water pump pulley and not a short BBC water pump pulley as they are not the same depth. The short style water pump pulley is more cone-shaped and deeper by about the amount you are off.

The correct short pump crank pulley will be flat right up against the face of the balancer, single or double groove. The alternator right now looks correct to line up with the correct crank pulley, it is just the wp that looks incorrect.
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Old 12-26-2009, 11:19 AM
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I agree with Eric, I also know there are different offsets on pulley even if they are BBC or SBC and also going by year and make of the engine. I had a friend of mine who had the same problem and he used a BB pulley from a Pontiac engine from the scrapyard, for whatever reason, it was different than other pulleys? Sometimes you have use spacers to get things to align as well.
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Old 12-26-2009, 11:38 AM
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Another thing to be aware of - often those low mount kits will put the alternator and the car's steering box in the same place, especially on cars like your Chevelle that have the steering box forward of the front crossmember. We tried this once with a small block '85 Monte Carlo and it wouldn't clear the steering box. What looked perfect on the stand wouldn't work in the car, and with a BBC you've got even less space.

Seems the low mount kits are aimed more at the street rod guys, they won't fit the 67-69 Camaro or the 68-74 Nova either as they hit the front crossmember.
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Old 12-26-2009, 04:52 PM
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Thanks for the feedback.

Probably right about the pump pulley, it came from a friend's part box, it's ok, he's got more and the price is right - I'll just have to look harder.

Finding the right crank pulley is tricky, I'm hoping to find the single groove, the repro version is expensive, I found an aftermarket one that's ok, but I'll check my friend's parts box again before I buy one.

When I ordered the low mount kit I didn't think about clearing the steering box. I was thinking that since the PS pump usually mounted in that area it would be enough room for the alt. I'll get out the tape measure and thinking cap, wish me luck.
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Old 12-26-2009, 04:54 PM
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Get the # off the pulley and run them and then you will know for sure what you have. JMO

Cole
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Old 12-28-2009, 03:41 PM
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Cole,

I got thee number, where do I check it?

Ericnova72
Your right it aint gonna fit. In the pic it is about 8 inches from the top motor mount hole to the large part of the steering box. Extended from that point forward on the engine is about the middle of the alternator, clear radius to the steering box is less than three inches.

Oh well back to the drawing board, I need all of the LH upper mount brackets, spacer, bolts.
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Old 12-28-2009, 04:35 PM
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Here try this. http://www.alangrovecomponents.com/Pulleys.htm .

Cole
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Old 12-29-2010, 06:59 AM
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Aftermarket Brackets

What aftermarket brackets do you suggest? I have that exact situation with a long water pump. Thanks
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Old 01-04-2011, 09:48 AM
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Update.

The low mount didn't work at all.

I got single groove crank (pn CP01) and water pump (pn WP01) pulleys from Ausley's (very good price) and then I got the upper LH mount kit from summit (pn SUM-420103). Test fit and all looks good.
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