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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old October 17th, 2016, 01:35 PM
bpmcgee bpmcgee is offline
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Default 305/350 accessories question

My 305A has an alternator in the stock generator position and an (old) aftermarket A/C compressor in the same position, but drivers side. It doesn't have a belt currently.

I have a 2 belt crank pulley, so obviously the front belt would drive the A/C compressor. If I wanted to add factory power steering, I assume it would go low on the drivers side like the 71+ power steering? Would it use a third belt?

How many accessories were GMC putting on these engines, and how would they be driven?

Thanks for your feedback -- I'm new to the GMC V6.

Brian
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Old October 17th, 2016, 01:51 PM
bobdylan bobdylan is offline
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Default Re: 305/350 accessories question

power steering goes below a/c compressor, uses 3 belt pulley on crank.
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Old October 17th, 2016, 02:17 PM
bpmcgee bpmcgee is offline
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Default Re: 305/350 accessories question

Bob,

Thanks, that's what I suspected. Are pulleys interchangeable between the 305 and 351?

Brian
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Old October 17th, 2016, 06:43 PM
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Funky61 Funky61 is offline
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Default Re: 305/350 accessories question

They will interchange and there was an add-on third pulley for the crank that I believe was for the AC on later Trucks.
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Old October 17th, 2016, 08:43 PM
bpmcgee bpmcgee is offline
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Default Re: 305/350 accessories question

An add-on pulley? I've got a double pulley right now. This would let me convert the double to a triple?

Happen to have any pics of this?

Thanks!

Brian
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Old October 18th, 2016, 02:05 AM
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Default Re: 305/350 accessories question

Here is that add-on lower pulley photo
Attached Images
File Type: jpg IMG_0022.JPG (1.70 MB, Multiple views, 10 clicks)
File Type: jpg IMG_0024.JPG (1.82 MB, Multiple views, 12 clicks)
File Type: jpg IMG_5535.JPG (1.71 MB, Multiple views, 7 clicks)
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Old October 18th, 2016, 03:06 AM
bpmcgee bpmcgee is offline
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Default Re: 305/350 accessories question

Awesome, thanks! You don't want to sell that one do you?
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Old October 18th, 2016, 04:27 AM
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Default Re: 305/350 accessories question

Sorry BP, it's part of a package I'm holding onto for now.
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Old October 18th, 2016, 04:47 AM
bigblockv6 bigblockv6 is offline
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Default Re: 305/350 accessories question

Quote:
Originally Posted by Funky61 View Post
They will interchange and there was an add-on third pulley for the crank that I believe was for the AC on later Trucks.
You're right on that, later 67-69 with GM Frigidaire compressor like my 68 use that add on third pulley
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Old October 18th, 2016, 01:51 PM
bpmcgee bpmcgee is offline
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Default Re: 305/350 accessories question

BB,

Do you have a picture showing the routing of the belts? I don't have a belt on the A/C compressor at this point, but it looks like the belt would run VERY close to the water pump.

B
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