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06-13-2020, 05:45 PM
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#1 |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Power Steering pulley alignment.
Hi I'm trying to add power steering to my '72 C20 and I'm having issues with the crank pulley and the ps pulley lining up. They are slightly mis aligned. I have the original ps pump brackets and these pulleys. https://www.ebay.com/itm/GM-Black-Si...72.m2749.l2649 https://www.ebay.com/itm/Chevy-Small...72.m2749.l2649
Any ideas? (And yes the ps pulley is on all the way) Last edited by Chilly178; 06-13-2020 at 06:00 PM. |
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06-13-2020, 07:57 PM
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#2 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,068
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Re: Power Steering pulley alignment.
Might put a straightedge on there and measure to see exactly how far off it is, then look arounf for a shim, or make one.
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06-13-2020, 09:00 PM
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#3 |
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Registered User
Join Date: Mar 2007
Location: San Pedro River, SE Arizona
Posts: 734
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Re: Power Steering pulley alignment.
Just thinking out loud, but maybe there were two PS units with differing shaft lengths that year (s) or maybe it is a BB/SB part mixup. I had a problem like that when a parts place sold me a BB fuel pump for my SB. Slightly different operating rod. Same kind of thing with the short and long SB water pumps. Given the correct mount brackets and correct pump, that misalignment should not be.
__________________
CCCC 67 Sting Ray Coupe 327 4sp; 68 K10 Suburban 327 4sp; 69 K20 Lifted 383 4sp; 69 C80 Fire Truck 478 V6 5sp/2sp; 69 C20 Longhorn 327 4sp; 70 C30 Wrecker 350 4sp; 70 C30 Flat Bed 350 4sp; 71 C20 LWB 350 4sp; 72 K5 Blazer 350 4sp; 72 C30 Flat Bed Gooseneck Hauler with sleeper 350/TH400; 72 C20 Longhorn 402 4sp; 52 Mack LTL Supercharged Cummins 5sp x 3sp; 01 Dodge 5.9 HO Cummins 6spd; 02 Safari Trek 2430 8.1 Vortec on Workhorse Chassis; 03 Silverado 2500 HD 4wd Duramax/Allison Moved but still in the family 70 C20 Custom Camper 350/TH350; 72 K5 Blazer CST Highlander 350/TH350 Recently sent to new homes 72 C30 MoHome 402 4sp; 72 K5 Blazer Conv 350 4sp; 75 GMC 6000 Aerial 350 w Allison; 72 GMC 3500 Utility 350 4sp; 70 GMC 3500, 350 4sp |
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06-13-2020, 09:04 PM
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#4 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
Is the pump of a 73 87 truck ?
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06-13-2020, 09:34 PM
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#5 | |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
Quote:
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06-13-2020, 09:46 PM
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#6 |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
I'm thinking I have the wrong ps pump pulley.
Last edited by Chilly178; 06-13-2020 at 09:59 PM. |
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06-14-2020, 12:21 AM
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#7 |
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Registered User
 Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Power Steering pulley alignment.
I am thinking you have the wrong pump. The shaft do not stick out like that on my stock rig.
Should not have to push the pulley so far in. Just checked RockAuto, for a picture reference. It appears they have some castings that have raised mounts, checked both big block and small block applications. There is definitely a difference in some of the castings on the pump assembly, not the reservoir. Last edited by toolboxchev; 06-14-2020 at 12:31 AM. |
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06-14-2020, 02:08 AM
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#8 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
That the pump pully sticks out sofar is why i think 73 87
The shaft i am fairly certin on my 72 puts the pully much closer to the pump I will take a pic of it in the morning |
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06-14-2020, 05:17 AM
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#9 |
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Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Power Steering pulley alignment.
If thats a press on pulley are you sure its all the way on? the earlier pumps had a key with nut holding the pulley on.
__________________
Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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06-14-2020, 06:58 AM
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#10 |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
It is not a press on pulley it has a key way. It may look long because I left the nut off for the pic.
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06-14-2020, 02:21 PM
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#11 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
Here are a couple quick pics
I was looking at how much back space shaft shown Looking at my 72 and its original pump The pump housing extends out |
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06-14-2020, 02:25 PM
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#12 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
Lol re looked at your pics on pc that is pump housing sticking out to on the pump
My tape meausure shot is from the inner side bracket |
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06-14-2020, 02:35 PM
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#13 | |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
Quote:
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06-14-2020, 02:39 PM
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#14 |
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Registered User
Join Date: May 2017
Location: Inman/Boiling Springs, SC
Posts: 420
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Re: Power Steering pulley alignment.
Mine in my 69 was off slightly and changing the crank pulley corrected it. Went from a two groove like you have to a three groove.
__________________
1985 C10 shortbed, current project. Member of the Upstate SC GM Truck Club. Last edited by 72LB; 06-14-2020 at 02:47 PM. |
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06-14-2020, 03:45 PM
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#15 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
That can be the issue the pump setup for an ac truck
Look up 3 groove crank pulley for an air conditioning truck |
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06-14-2020, 04:20 PM
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#16 | |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
Quote:
Last edited by Chilly178; 06-14-2020 at 04:34 PM. |
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06-14-2020, 05:59 PM
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#17 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
Here is a pic of my 3 groove water pump pully from my 69 which had factory ac
I no longer have the truck to compare ps pully differences I can dig around to see where my 72 2 groove pulley is Last edited by gmc684x4; 06-14-2020 at 07:37 PM. |
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06-14-2020, 06:46 PM
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#18 | |
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Registered User
Join Date: May 2016
Location: Green Bay, WI
Posts: 131
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Re: Power Steering pulley alignment.
Quote:
What I got measuring off the balancer. |
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06-14-2020, 07:39 PM
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#19 | |
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Registered User
Join Date: May 2017
Location: Inman/Boiling Springs, SC
Posts: 420
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Re: Power Steering pulley alignment.
Quote:
__________________
1985 C10 shortbed, current project. Member of the Upstate SC GM Truck Club. Last edited by 72LB; 06-15-2020 at 12:36 PM. |
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06-14-2020, 07:47 PM
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#20 |
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Registered User
Join Date: Jul 2012
Location: Whitehorse yukon
Posts: 1,218
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Re: Power Steering pulley alignment.
I mistook my 69 water pump pully for the crank pulley
I looked at my other trucks they no longer have a ps pump You could get a second set of hands use a straight edge and a tape to see where your belt needs to go to compare to a parts store 3 pully or two pully for the crank I think most of my 67 72 small block stuff went with my 69 when i sold it |
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