AC compressor pulley size for 351C 1972 Mustang

[Regpr]

Hello, I have the estate sale 1972 mustang with 351 Cleveland with factory AC but I'm missing the pulley and clutch and pulley for water pump I think, what diameter AC pulley do I need ? found a 7" one is that correct? Thanks, Anyone have a water pump pulley that will work, see picture of my motor attached.

 

[cv_72mustang]

I'm not sure that's a factory AC compressor?

 

[giantpune]

I'm not sure that's a factory AC compressor?

You can tell it is cause it says mustang on it.
It looks pretty close to stock to me. Minus the artistic liberty they took with the cover. Then the clutch, idler, and water pump pulleys. Not sure about 72, but my 73 had the power steering cooler mounted to the top where that killer "mustang" plate is. It may be a reman? There's a tag on it near where the big hoses connect.

 

[Sheriff41]

It's a factory style York compressor. Just buy a clutch with the 6.25" pulley and an idler pulley to get it all set. You don't need a water pump pulley since the belt for the AC doesn't ride on the water pump.

 

[giantpune]

It's a factory style York compressor. Just buy a clutch with the 6.25" pulley and an idler pulley to get it all set. You don't need a water pump pulley since the belt for the AC doesn't ride on the water pump.

Its not just the idler pulley, right? It is on a little arm that swings back and forth to adjust it. He doesn't appear to have that arm or the bolts for it.

 

[Regpr]

Guys, I don't understand, what do you mean its not on the water pump pully, can someone send a picture of what it should look like stock?
Thanks

 

[giantpune]

The idler pulley positions the belt so its a straight drop down to the front rib on the crank pulley. the AC belt doesnt need to touch the water pump pulley.

 

[Sheriff41]

Its not just the idler pulley, right? It is on a little arm that swings back and forth to adjust it. He doesn't appear to have that arm or the bolts for it.

https://www.rockauto.com/en/moreinfo.php?pk=3843660&cc=1132489&pt=6956&jsn=691

 

[Hemikiller]

The water pump pulley you have looks correct.

Here's the style clutch you need. The large flywheel is to prevent belt slap. Try a wanted ad in the Classifieds. I'm fairly certain several of our members may have unused parts they'd be willing to sell off.

...and the idler pulley you'll need: https://www.rockauto.com/en/catalog...51cid+v8,1132861,belt+drive,idler+pulley,6956



https://www.ebay.com/itm/1265841138...uid=XqhhXK8YTnO&widget_ver=artemis&media=COPY

 

[basstrix]

I've found mustangtek to be relatively easy to use and helpful with things like pulleys, fans, shrouds, carbs, etc. I think this is the fan pulley your 72 should use.

 

[tony-muscle]

I may have an A/C clutch pulley from my old York somewhere if you need one.

 

[Regpr]

Thanks guys for all your help. I found a York compressor with a 7" pulley for 25 bucks on Craigs list locally. I will order the tensioner from Rock auto. Then to get an AC shop to hook it all up and charge it.

 

[Bill Kanode]

Hello, I have the estate sale 1972 mustang with 351 Cleveland with factory AC but I'm missing the pulley and clutch and pulley for water pump I think, what diameter AC pulley do I need ? found a 7" one is that correct? Thanks, Anyone have a water pump pulley that will work, see picture of my motor attached. View attachment 97812

 

[Bill Kanode]

The compressor looks correct like mine and I also installed the Mustang top plate for S&Gs. Mine has a large weight that I suppose is there to prevent drag on motor when the AC is engaged. You will also need the idler (probably removed because the bearing goes bad) but can be bought at Mustang vendors. My bearing was bad and I replaced the pulley/bearing with one from a later model Ford that was machined not pressed as I bent mine accessing the bearing. Check to make sure the fast idle solenoid is working as the engine may stall at idle when the AC is energized.I had to fabricate one from a Toyota with silicone wire as it lays on the intake manifold and got crispy. It has a 1 wire connector at the rear of the intake manifold. I will have to measure the pulley but I am sure it is a 6" diameter. I had ALL pulleys and brackets from engine to bumper brackets powdered coated black during restoration.