I need suggestion on why a/c pulley is not lining up right. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

keh27 · 04-19-2015, 02:48 PM

heres pics of what I have going on. This engine is a 79 350 that I have bought parts for to make it look like it should have in my 69.. The a/c brackets are from a 69 the pulleys are from a 71 or 72 . As you vcan see in the pics I have to "shim" the back of the compressor to get it to line up. all other belts line up just fine. I'm not sure what I have going on here hoping someone may see something wrong and tell me. The shim thing isn't going to work because the top bracket won't line up. If you see or know what's going on here let me know... thanks in advance,

keh27 · 04-19-2015, 02:50 PM

a few more

keh27 · 04-19-2015, 02:51 PM

1 more

Andy4639 · 04-19-2015, 07:11 PM

I had a double water pump pulley on the 305 and the AC went on the second puley so you 3 row it should be on the middle pully not the outter 3rd one.

Here is the correct belt line up for a small block.

Outside belt is crank and power steering. Middle belt is crank water pump and AC. Inner belt is water, crank and alternator.

11SECSS · 04-19-2015, 07:37 PM

Are you sure the pulleys and brackets are for short or long water pump ?

keh27 · 04-19-2015, 08:16 PM

Quote:

Originally Posted by 11SECSS

Are you sure the pulleys and brackets are for short or long water pump ?

they suppose to be short, but thats what I 'm wondering

keh27 · 04-19-2015, 08:29 PM

Quote:

Originally Posted by Andy4639

I had a double water pump pulley on the 305 and the AC went on the second puley so you 3 row it should be on the middle pully not the outter 3rd one.

Here is the correct belt line up for a small block.

Outside belt is crank and power steering. Middle belt is crank water pump and AC. Inner belt is water, crank and alternator.

I posted a pic..... I guess the problem is the crank pulley... If they were for a long waterpump would the other two belts still line up?

Andy4639 · 04-19-2015, 09:58 PM

From this picture it looks like you need a differant crank pulley setup. Your crank shouldn't have that big gap between the pulleys. They should all be tight and they should line up fine.

keh27 · 04-19-2015, 10:23 PM

Quote:

Originally Posted by Andy4639

From this picture it looks like you need a differant crank pulley setup. Your crank shouldn't have that big gap between the pulleys. They should all be tight and they should line up fine.

That's what i'm guessing that too,, but all the pulleys came off the same engine I bought them from a forum member ? I 'm trying to contact him but no luck so far

keh27 · 04-20-2015, 09:14 AM

Just heard from the member they are a short w/p set off a 69 c20 ? So if anyone has any idea's let me know

67ChevyRedneck · 04-20-2015, 09:38 AM

GM had so many variations of pulley combinations it's ridonkulous. Single, double, triple, quadruple, A/C, no A/C, P/S, 2wd/4wd, small block, big block.

Typically, for an A/C & Power steering set up you would have a double groove pulley on the W/P and a triple on the crank. The inside is for the Alternator, middle for A/C, and outer for P/S.

Move the A/C to the middle and get a new crank pulley. The seller didn't mislead you, the truck it came off of had a different set up. I can't really tell from the pics, but does your crank only have two grooves? It looks to me like the truck your pulleys came from had PS but no A/C.

67ChevyRedneck · 04-20-2015, 09:43 AM

The crank pulley looks correct to me for a SWP, just wrong "set up." The long water pump crank pulley sits far off the balancer, like this (I converted my truck from a 73+ LWP to correct looking SWP set up):

*gmachinz* · 04-20-2015, 10:48 AM

The pulley set for a SWP keh27 got from me when I parted out C20 I had awhile back. The AC brackets on my truck looked different from what you are using at least it looks like to me. I wonder, are you using a different balancer perhaps that is not quite as thick? The one that was on my C20 was pretty massive. The threads in the end of the crank snout were bad so I couldn't pull the OEM balancer off.

Livrat · 04-20-2015, 10:51 AM

The pulleys you have are for a short water pump setup, its just that your lower inner crank pulley is for a non-ac setup. The pictures that ANDY4639 posted are correct, The grooves that you have your AC belt on in the pictures are originally intended for a smog pump.
You just need a double groove crank pulley like this:
http://www.ebay.com/itm/63-64-65-66-...58383c&vxp=mtr

mrein3 · 04-20-2015, 01:27 PM

Quote:

Originally Posted by 67ChevyRedneck

GM had so many variations of pulley combinations it's ridonkulous. Single, double, triple, quadruple, A/C, no A/C, P/S, 2wd/4wd, small block, big block.

...stuff deleted

I fought and fought and fought with issues on my truck with pulley combos for years. What happened to me was under certain RPMs, the alternator belt would set up a vibration that was actually quite wild and would eventually snap off the alternator mounting bracket. Which on a truck without AC also takes out your water pump. Which is bad. (I added AC later).

What I finally ended up doing is getting a FULL set of pulleys off of a truck that wasn't bastardized by one or more previous owners. Since I was planning to add AC I made sure I got them all off of a truck the the general made with AC.

That was over 10 years ago. I have never looked back.

Long story short, watch the parts board for a fresh part-out and ask to purchase all the pulleys on the water pump and all the pulleys on the crank.

*gmachinz* · 04-20-2015, 02:23 PM

http://67-72chevytrucks.com/vboard/a...5&d=1423780677

This was one of the under hood pics I took. This was a factory AC truck-he opted to not take the AC brackets since he already had those...but, mine are different than he shows. ???
Posted via Mobile Device

keh27 · 04-20-2015, 02:53 PM

Quote:

Originally Posted by gmachinz

http://67-72chevytrucks.com/vboard/a...5&d=1423780677

This was one of the under hood pics I took. This was a factory AC truck-he opted to not take the AC brackets since he already had those...but, mine are different than he shows. ???
Posted via Mobile Device

Man I'm not blaming you at all. If it sounded that way I surely didn't mean for it to....i'm just needing help to figure it out. I do know that 67-68 a/c brackets are different but I thought 69-72 where the same . It could be all on me but I was wanting some insight.

Davidf · 04-20-2015, 04:15 PM

My '71 with A/C does not use that top bracket that shows in the PO's photos. If I remember, I will snap a photo this evening.

Andy4639 · 04-20-2015, 07:35 PM

The pictures I posted are the correct setup for a c-10 small block short water pump with factory alternator, AC, power steering. If you want to mix and match the pulleys that fine but the correct setup is as I showed. The setup you have is for a non AC truck.

Factory AC brakets:

This shows the belt routing.

Factory AC brackets I took off and sold.

keh27 · 04-20-2015, 10:51 PM

thanks everybody for the help

keh27 · 04-20-2015, 11:30 PM

I had some time tonight to do a little research ......
Found this thread.http://67-72chevytrucks.com/vboard/s...d.php?t=130114

Davidf · 04-21-2015, 09:16 AM

Quote:

Originally Posted by keh27

I had some time tonight to do a little research ......
Found this thread.http://67-72chevytrucks.com/vboard/s...d.php?t=130114

My '71 setup is similar to post #16 of the above link....no top bracket. It works fine.

04-19-2015, 02:50 PM	#2
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	Re: I need suggestion on why a/c pulley is not lining up right. a few more Attached Images __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407

04-19-2015, 02:51 PM	#3
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	Re: I need suggestion on why a/c pulley is not lining up right. 1 more Attached Images __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407

04-19-2015, 07:11 PM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: I need suggestion on why a/c pulley is not lining up right. I had a double water pump pulley on the 305 and the AC went on the second puley so you 3 row it should be on the middle pully not the outter 3rd one. Here is the correct belt line up for a small block. Outside belt is crank and power steering. Middle belt is crank water pump and AC. Inner belt is water, crank and alternator. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

04-19-2015, 07:37 PM	#5
11SECSS Registered User Join Date: Feb 2015 Location: Hampton Va Posts: 75	Re: I need suggestion on why a/c pulley is not lining up right. Are you sure the pulleys and brackets are for short or long water pump ? __________________ 1971 C10 SWB ...project in the works 2000 Camaro SS....weekend warrior/racecar 2005 Caddy EXT....Tow rig

04-19-2015, 09:58 PM	#8
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: I need suggestion on why a/c pulley is not lining up right. From this picture it looks like you need a differant crank pulley setup. Your crank shouldn't have that big gap between the pulleys. They should all be tight and they should line up fine. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

04-19-2015, 02:48 PM	#1
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	I need suggestion on why a/c pulley is not lining up right. heres pics of what I have going on. This engine is a 79 350 that I have bought parts for to make it look like it should have in my 69.. The a/c brackets are from a 69 the pulleys are from a 71 or 72 . As you vcan see in the pics I have to "shim" the back of the compressor to get it to line up. all other belts line up just fine. I'm not sure what I have going on here hoping someone may see something wrong and tell me. The shim thing isn't going to work because the top bracket won't line up. If you see or know what's going on here let me know... thanks in advance, Attached Images __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407

04-20-2015, 09:14 AM	#10
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	Re: I need suggestion on why a/c pulley is not lining up right. Just heard from the member they are a short w/p set off a 69 c20 ? So if anyone has any idea's let me know __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407

04-20-2015, 09:38 AM	#11
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: I need suggestion on why a/c pulley is not lining up right. GM had so many variations of pulley combinations it's ridonkulous. Single, double, triple, quadruple, A/C, no A/C, P/S, 2wd/4wd, small block, big block. Typically, for an A/C & Power steering set up you would have a double groove pulley on the W/P and a triple on the crank. The inside is for the Alternator, middle for A/C, and outer for P/S. Move the A/C to the middle and get a new crank pulley. The seller didn't mislead you, the truck it came off of had a different set up. I can't really tell from the pics, but does your crank only have two grooves? It looks to me like the truck your pulleys came from had PS but no A/C. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 04-20-2015 at 10:06 AM.

04-20-2015, 09:43 AM	#12
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: I need suggestion on why a/c pulley is not lining up right. The crank pulley looks correct to me for a SWP, just wrong "set up." The long water pump crank pulley sits far off the balancer, like this (I converted my truck from a 73+ LWP to correct looking SWP set up): __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications!

04-20-2015, 10:48 AM	#13
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: I need suggestion on why a/c pulley is not lining up right. The pulley set for a SWP keh27 got from me when I parted out C20 I had awhile back. The AC brackets on my truck looked different from what you are using at least it looks like to me. I wonder, are you using a different balancer perhaps that is not quite as thick? The one that was on my C20 was pretty massive. The threads in the end of the crank snout were bad so I couldn't pull the OEM balancer off.

04-20-2015, 10:51 AM	#14
Livrat Member #1049 Join Date: Jun 2000 Location: Troy Montana Posts: 3,940	Re: I need suggestion on why a/c pulley is not lining up right. The pulleys you have are for a short water pump setup, its just that your lower inner crank pulley is for a non-ac setup. The pictures that ANDY4639 posted are correct, The grooves that you have your AC belt on in the pictures are originally intended for a smog pump. You just need a double groove crank pulley like this: http://www.ebay.com/itm/63-64-65-66-...58383c&vxp=mtr

04-20-2015, 02:23 PM	#16
gmachinz Account Suspended Join Date: Jun 2011 Location: Des Moines, IA. Posts: 4,143	Re: I need suggestion on why a/c pulley is not lining up right. http://67-72chevytrucks.com/vboard/a...5&d=1423780677 This was one of the under hood pics I took. This was a factory AC truck-he opted to not take the AC brackets since he already had those...but, mine are different than he shows. ??? Posted via Mobile Device

04-20-2015, 04:15 PM	#18
Davidf Registered User Join Date: Nov 2014 Location: Austin Posts: 749	Re: I need suggestion on why a/c pulley is not lining up right. My '71 with A/C does not use that top bracket that shows in the PO's photos. If I remember, I will snap a photo this evening.

04-20-2015, 07:35 PM	#19
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: I need suggestion on why a/c pulley is not lining up right. The pictures I posted are the correct setup for a c-10 small block short water pump with factory alternator, AC, power steering. If you want to mix and match the pulleys that fine but the correct setup is as I showed. The setup you have is for a non AC truck. Factory AC brakets: This shows the belt routing. Factory AC brackets I took off and sold. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

04-20-2015, 10:51 PM	#20
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	Re: I need suggestion on why a/c pulley is not lining up right. thanks everybody for the help __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407



Register or Log In To remove these advertisements.

04-20-2015, 11:30 PM	#21
keh27 Registered User Join Date: Jul 2012 Location: franklin.tn Posts: 600	Re: I need suggestion on why a/c pulley is not lining up right. I had some time tonight to do a little research ...... Found this thread.http://67-72chevytrucks.com/vboard/s...d.php?t=130114 __________________ 69 step side http://67-72chevytrucks.com/vboard/s...d.php?t=613407

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Register or Log In To remove these advertisements.