How much Freon in a Burb with Rear Air - The 1947 - Present Chevrolet & GMC Truck Message Board Network

greguw · 07-15-2011, 04:40 PM

Hey guys , any one know how much a suburban with rear air holds . I know converting to the 134a operates at a higher temp so it will take about 10% less than the r12 .

TheApocalyptican · 07-15-2011, 05:14 PM

90-91: 84oz and 11 oz oil
89: 60oz and 10 oz oil
88: 84oz and 9 oz oil

These are the specs on all of the charts that I have found on the net. Not sure why the 89 model holds less, but like I said, thats what all the charts say. Also, the best way is to get the r12 charge off of the stick on the evap box itself.

thirdstreettito · 07-15-2011, 08:04 PM

Anybody know the pre 88?

greguw · 07-16-2011, 07:45 AM

Quote:

Originally Posted by TheApocalyptican

90-91: 84oz and 11 oz oil
89: 60oz and 10 oz oil
88: 84oz and 9 oz oil

These are the specs on all of the charts that I have found on the net. Not sure why the 89 model holds less, but like I said, thats what all the charts say. Also, the best way is to get the r12 charge off of the stick on the evap box itself.

Thanks buddy ... I was going to do 9oz of the oil but may do the 11 oz , I'm not running a GM compressor , I'm using a dodge Sanden , I had custom lines made for my build .
Not sure why the lesser amount , if anything my may require as much as 84 oz but I will under fill it due to the high operating temps of the 134a .
Thanks again buddy !

greg

**Boog** · 07-16-2011, 08:05 AM

This from the web. Lists many makes.

greguw · 07-16-2011, 11:36 AM

Thanks buddy ... I just got her all juiced up , 10 oz of oil , this was a 134 retro fit before , so I just blew everything out and a new dryer ... Were blowing snow ...LOL
I did 6 of the 12 oz cans and that got me were I need to be , I can add a little more once I get the truck on the road .
Nice and cool even inside a shop wit the electric fans , should be way better when its getting some real air flowing thru the condenser .

I'm just amazed with my missed matched configuration of custom lines and hose's it works ...LOL

07-15-2011, 04:40 PM	#1
greguw Registered User Join Date: Jun 2010 Location: Bucks County , Pa Posts: 223	How much Freon in a Burb with Rear Air Hey guys , any one know how much a suburban with rear air holds . I know converting to the 134a operates at a higher temp so it will take about 10% less than the r12 .

07-15-2011, 05:14 PM	#2
TheApocalyptican Registered User Join Date: Jun 2010 Location: Las Vegas, Nv Posts: 312	Re: How much Freon in a Burb with Rear Air 90-91: 84oz and 11 oz oil 89: 60oz and 10 oz oil 88: 84oz and 9 oz oil These are the specs on all of the charts that I have found on the net. Not sure why the 89 model holds less, but like I said, thats what all the charts say. Also, the best way is to get the r12 charge off of the stick on the evap box itself. __________________ 1995 Suburban K2500 454.....off road & towing 1999 Astro, work van 2006 Silverado 2wd 5.3 w/4.5" lift and 33s

07-15-2011, 08:04 PM	#3
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: How much Freon in a Burb with Rear Air Anybody know the pre 88? __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

07-16-2011, 11:36 AM	#6
greguw Registered User Join Date: Jun 2010 Location: Bucks County , Pa Posts: 223	Re: How much Freon in a Burb with Rear Air Thanks buddy ... I just got her all juiced up , 10 oz of oil , this was a 134 retro fit before , so I just blew everything out and a new dryer ... Were blowing snow ...LOL I did 6 of the 12 oz cans and that got me were I need to be , I can add a little more once I get the truck on the road . Nice and cool even inside a shop wit the electric fans , should be way better when its getting some real air flowing thru the condenser . I'm just amazed with my missed matched configuration of custom lines and hose's it works ...LOL



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