Pulley alignment problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Southedisto · 01-19-2007, 08:05 PM

While converting to PS, I realized that neither pulley I have will work. So which crank pulley do I need. If someone has a pic, or the pulley I need, please post up. Here are the pics of my problem, shallow and deep pulley.

Also, would the brackets make any difference? I have two sets of those also, both of them different. One is cast, and one is stamped, all help is greatly appreciated.

**69TowRig** · 01-19-2007, 08:14 PM

Just went through this, and Joey67 did too. You have a short water pump. That 2nd pulley is a short water pump PS pulley. You will need either a 3 or 4 groove crank pulley for short water pump to make that work. The short pump crank pulleys fit flush to the harmonic balancer. This is using the cast brackets.

After playing around in the WTB section for over a week I called summit and ordered their 3-groove chrome crank pulley P/N SUM-G3972. It should arrive mid-week and I will report back if it fits or not, but I am pretty confident that it will work great.

*rage'nrat638* · 01-19-2007, 09:25 PM

heres a picture
mines a double cast crank pulley and a double rear pulley

**69TowRig** · 01-28-2007, 02:43 AM

Quote:

Originally Posted by 69TowRig

After playing around in the WTB section for over a week I called summit and ordered their 3-groove chrome crank pulley P/N SUM-G3972. It should arrive mid-week and I will report back if it fits or not, but I am pretty confident that it will work great.

Well as it turned out, that particular pulley is the wrong diameter for my application (I should have drove the hour round trip to measure the pulley where the truck is stored). The original was a 6 3/4" and that Summit pulley is a 7 1/4", so it contacts the water pump pulley and won't work. Ugh now I have to send it back to Summit and cough up even more money for the smaller diameter one.

Sport/Truck · 01-19-2007, 11:29 PM

I’ll make note of the crank pulley as I don’t think my pulley issues are solved yet.
Thanks for the PN#.
s/t

Southedisto · 01-20-2007, 01:22 PM

Would a later model work?

ratrod67 · 01-20-2007, 01:31 PM

Quote:

Originally Posted by Southedisto

Would a later model work?

Up to 72 will work unless you can find one from a corvette or 1 ton truck. 73 and up used the long water pump set-up. Mine is a double crank pulley with a single add on for the power steering.

Southedisto · 01-20-2007, 01:41 PM

Quote:

Originally Posted by ratrod67

Up to 72 will work unless you can find one from a corvette or 1 ton truck. Mine is a double crank pulley with a single add on for the power steering.

I have read that a dozen times since last night, guess I'm getting desperate

. Thanks for the reality slap

red71cheyenne · 01-20-2007, 03:34 PM

I had the same issues installing power on the Blazer, and just bought 3/8 inch spacers from the hardware store to move the pulley out far enough to reach. Had to also get the proper pulley used from a board member as I didn't have the right one. Looks like the deep one in your pic.

TraderJon · 01-20-2007, 07:01 PM

i know how you feel,I just went thru the same when doing the bbc swap,between my two buckets of pulleys & my buddies two buckets,i managed to scrape up a set off of a 81 3/4 ton truck,,,I had to buy a new p.s. pump from O'rielly's & i think Ragenrat gave me the part #'s for the p.s. brackets,thanks Mark !,,,Good luck..
Jon

01-19-2007, 08:05 PM	#1
Southedisto River life...... Join Date: Oct 2005 Location: Soldotna AK Posts: 1,078	Pulley alignment problems While converting to PS, I realized that neither pulley I have will work. So which crank pulley do I need. If someone has a pic, or the pulley I need, please post up. Here are the pics of my problem, shallow and deep pulley. Also, would the brackets make any difference? I have two sets of those also, both of them different. One is cast, and one is stamped, all help is greatly appreciated. Attached Images __________________ I like wheelin in Dixie! Last edited by Southedisto; 01-19-2007 at 08:09 PM.

01-19-2007, 08:14 PM	#2
69TowRig Senior Member Join Date: Jan 2005 Location: Raleigh, NC Posts: 897	Re: Pulley alignment problems Just went through this, and Joey67 did too. You have a short water pump. That 2nd pulley is a short water pump PS pulley. You will need either a 3 or 4 groove crank pulley for short water pump to make that work. The short pump crank pulleys fit flush to the harmonic balancer. This is using the cast brackets. After playing around in the WTB section for over a week I called summit and ordered their 3-groove chrome crank pulley P/N SUM-G3972. It should arrive mid-week and I will report back if it fits or not, but I am pretty confident that it will work great. __________________ -Chris Building a stripper, one part at a time: 1969 K5, 307, 3spd, 3 seats, hard top. Added Pwr Discs, Pwr Steering, Aux Battery, T-case Skid, Lighted Sidemarkers, HEI, Lock-Right Diff, ECE Class IV Hitch, 32" MT/Rs. Parts to Install: Hand Throttle, Console, Tow Hooks, Dual Horns, AM-FM, Dealer Swing-Away Tire Carrier, Gas Tank Skid. Also building a 1950 Willys CJ-3A and off-roading a 2001 Nissan Frontier on 1-Ton Portals...

01-19-2007, 09:25 PM	#3
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Pulley alignment problems heres a picture mines a double cast crank pulley and a double rear pulley Last edited by rage'nrat638; 07-12-2007 at 06:58 AM.

01-19-2007, 11:29 PM	#5
Sport/Truck Sierra Grande Club Join Date: Jan 2007 Location: New Mexico USA Posts: 2,433	Re: Pulley alignment problems I’ll make note of the crank pulley as I don’t think my pulley issues are solved yet. Thanks for the PN#. s/t __________________ 1971 GMC Sierra Grande, 1/2 ton short wide, original 4 bolt 010 020 block & heads. (matching #'s). 383 stroker, SMI q jet 750 cfm, Lunati Voodoo 60102 cam, Scorpion roller rockers, Spin Tech pro street mufflers with X pipe.

01-20-2007, 01:22 PM	#6
Southedisto River life...... Join Date: Oct 2005 Location: Soldotna AK Posts: 1,078	Re: Pulley alignment problems Would a later model work? __________________ I like wheelin in Dixie!

01-20-2007, 03:34 PM	#9
red71cheyenne Back in the sticks Join Date: Jan 2001 Location: Fordland, MO Posts: 3,188	Re: Pulley alignment problems I had the same issues installing power on the Blazer, and just bought 3/8 inch spacers from the hardware store to move the pulley out far enough to reach. Had to also get the proper pulley used from a board member as I didn't have the right one. Looks like the deep one in your pic. __________________ 1971 Cheyenne C-10 w/700R4 and Tuned Port Injection 1969 K5 Blazer w/Tuned Port 2010 2SS/RS Flaming Orange Camaro 2011 K1500 Suburban 2014 K1500 Pickup 2008 Nissan Altima? The wifes' hoopty

01-20-2007, 07:01 PM	#10
TraderJon Registered User Join Date: Dec 2005 Location: League City,Texas Posts: 66	Re: Pulley alignment problems i know how you feel,I just went thru the same when doing the bbc swap,between my two buckets of pulleys & my buddies two buckets,i managed to scrape up a set off of a 81 3/4 ton truck,,,I had to buy a new p.s. pump from O'rielly's & i think Ragenrat gave me the part #'s for the p.s. brackets,thanks Mark !,,,Good luck.. Jon

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