AC Belt Alignment problem stock 350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JackB · 06-27-2018, 05:19 PM

I have a problem with the belt alignment on my stock 350 motor . All the brackets are stock original sbc parts but the AC compressor is off by one groove. Basically it wants to line up with the crank/water pump groove already being used by the alternator. Any ideas what my problem is? Wrong clutch on the compressor maybe? Should the compressor mount in front of the adjusting bracket and not the back?

**Steeveedee** · 06-27-2018, 06:09 PM

Move the compressor forward of the bracket.

**leddzepp** · 06-27-2018, 06:37 PM

Your compressor is mounted correctly on the top bracket (it goes behind it). It goes in front of the lower circular shaped bracket. I can’t tell from the pic if yours is mounted correctly on that bracket. From the top pic it looks like it’s behind the circular bracket...it should be sandwiched between them.

**Stocker** · 06-27-2018, 07:18 PM

Quote:

Originally Posted by leddzepp

Your compressor is mounted correctly on the top bracket (it goes behind it). It goes in front of the lower circular shaped bracket. I can’t tell from the pic if yours is mounted correctly on that bracket. From the top pic it looks like it’s behind the circular bracket...it should be sandwiched between them.

^^ This.

Easier to see the brackets in this pic. The big cast (gray) bracket bolts to the engine. The black circular bracket bolts in front of the cast bracket, as shown in the pic.

Then your compressor bolts in front of the circular plate. Finally, the slotted top bracket goes in front of the compressor as shown in your pic.

**Stocker** · 06-27-2018, 07:42 PM

Found one more pic that might help.

JackB · 06-28-2018, 12:00 AM

Thanks guys the pics helped a bunch and its all together. One thing I did run across is the electric connection is very close to the bracket. So close that I had to bend the prongs out to get the connector on. I think I read someone else had this issue as well the original compressors had the electrical connection somewhere around the 11 O'clock position and at least some of the remans are more like 1 or 2 O'clock. At any rate I think its going to be OK.

**Stocker** · 06-28-2018, 12:45 AM

Quote:

Originally Posted by JackB

One thing I did run across is the electric connection is very close to the bracket. So close that I had to bend the prongs out to get the connector on. I think I read someone else had this issue as well the original compressors had the electrical connection somewhere around the 11 O'clock position and at least some of the remans are more like 1 or 2 O'clock. At any rate I think its going to be OK.

If it's an issue, the front of the compressor can be re-clocked to place the connector in a better location. I just had a new reman compressor installed and the connector was in a bad spot. The shop was able to re-clock it.

stsalvage · 06-29-2018, 04:26 AM

I have Know idea why you cut the shroud. the ones on my 1971 dose not show you have to

stsalvage · 06-29-2018, 04:31 AM

More pics of the 1971 1/2 ton chevy truck

stsalvage · 06-29-2018, 04:33 AM

More stuff on the AC of what you need

JackB · 06-30-2018, 07:33 PM

Thanks again guys..AC is hooked up and functioning...The pictures were a great help.

06-27-2018, 05:19 PM	#1
JackB Registered User Join Date: May 2015 Location: Prescott AZ Posts: 199	AC Belt Alignment problem stock 350 I have a problem with the belt alignment on my stock 350 motor . All the brackets are stock original sbc parts but the AC compressor is off by one groove. Basically it wants to line up with the crank/water pump groove already being used by the alternator. Any ideas what my problem is? Wrong clutch on the compressor maybe? Should the compressor mount in front of the adjusting bracket and not the back? Attached Images Last edited by JackB; 06-27-2018 at 05:28 PM.

06-27-2018, 06:09 PM	#2
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,088	Re: AC Belt Alignment problem stock 350 Move the compressor forward of the bracket. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

06-27-2018, 06:37 PM	#3
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,981	Re: AC Belt Alignment problem stock 350 Your compressor is mounted correctly on the top bracket (it goes behind it). It goes in front of the lower circular shaped bracket. I can’t tell from the pic if yours is mounted correctly on that bracket. From the top pic it looks like it’s behind the circular bracket...it should be sandwiched between them. __________________ 1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man Last edited by leddzepp; 06-27-2018 at 06:52 PM.

06-27-2018, 07:42 PM	#5
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,497	Re: AC Belt Alignment problem stock 350 Found one more pic that might help. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

06-28-2018, 12:00 AM	#6
JackB Registered User Join Date: May 2015 Location: Prescott AZ Posts: 199	Re: AC Belt Alignment problem stock 350 Thanks guys the pics helped a bunch and its all together. One thing I did run across is the electric connection is very close to the bracket. So close that I had to bend the prongs out to get the connector on. I think I read someone else had this issue as well the original compressors had the electrical connection somewhere around the 11 O'clock position and at least some of the remans are more like 1 or 2 O'clock. At any rate I think its going to be OK. Attached Images

06-29-2018, 04:26 AM	#8
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: AC Belt Alignment problem stock 350 I have Know idea why you cut the shroud. the ones on my 1971 dose not show you have to Attached Images

06-29-2018, 04:31 AM	#9
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: AC Belt Alignment problem stock 350 More pics of the 1971 1/2 ton chevy truck Attached Images

06-29-2018, 04:33 AM	#10
stsalvage Scrapper 1 Join Date: Jan 2007 Location: Riverside Calif Posts: 1,649	Re: AC Belt Alignment problem stock 350 More stuff on the AC of what you need Attached Images

06-30-2018, 07:33 PM	#11
JackB Registered User Join Date: May 2015 Location: Prescott AZ Posts: 199	Re: AC Belt Alignment problem stock 350 Thanks again guys..AC is hooked up and functioning...The pictures were a great help. Attached Images



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