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68 Suburban · 05-30-2003, 05:48 AM

I am finishing up installing an aftermarket A/C system in the burb. The A/C shop wants $32 to evacuate and $12 a pound for the R-134.

This seems reasonable, but I have some R-134 lying around. Will I cause any problems if I put about 2 lbs in my system before I take it over to be evacuated? Then they can top it off. I just dont feel like spending $36 for freon I all ready have.

Thanks

firstgencamaros · 05-30-2003, 06:32 AM

When they evac the system they will pull everything out of the system. So, you'll just be wasting your freon. They might be willing to use your freon if your paying them to do everything else. If they wont work with you, let me know, I know a shop here in Mesa that would probably work with you.
Later,
FGC

Andy4639 · 05-30-2003, 07:35 AM

Once you get the truck driving take it to the shop and let them pull vacuum on it check for leaks and drive it home and filler up with R-134 A.

68 Suburban · 05-30-2003, 08:28 AM

Quote:

Originally posted by Andy4639
Once you get the truck driving take it to the shop and let them pull vacuum on it check for leaks and drive it home and filler up with R-134 A.

Is that the same as evacuating the system?

ddsmith · 05-30-2003, 08:43 AM

They pull it into a deep vacuum. Basically removing everything that will boil at very low vacuum.(freon, moisture) As long as no leaks exist in your system this will work. I will caution you to ensure that the lines you connect for charging at home are purge with a small flow of freon to the environment just prior to hooking to the connection on the truck. This will blow out any air/moisture sitting in the lines and then all you'll be charging is freon. That first can of freon charges real fast because you are essentially breaking the vacuum in the system with the first can. Good luck.

Yellow Cheyenne · 05-30-2003, 11:24 AM

Systems using R134 are much more sensitive to needing the correct amount of freon to work correctly. Too much or too little and it won't cool right. For some reason, the sight glass method doesn't work for 134. May want to see if they would use yours. If not, just keep it to top off the system in the future when a little leaks off.

05-30-2003, 05:48 AM	#1
68 Suburban Registered User Join Date: Oct 2000 Location: From Chicago, Live in Phoenix, AZ Posts: 6,802	A/C Question. I am finishing up installing an aftermarket A/C system in the burb. The A/C shop wants $32 to evacuate and $12 a pound for the R-134. This seems reasonable, but I have some R-134 lying around. Will I cause any problems if I put about 2 lbs in my system before I take it over to be evacuated? Then they can top it off. I just dont feel like spending $36 for freon I all ready have. Thanks __________________ Just sitting here contemplating contemplation.

05-30-2003, 06:32 AM	#2
firstgencamaros Registered User Join Date: Sep 2002 Location: Gilbert, AZ Posts: 151	When they evac the system they will pull everything out of the system. So, you'll just be wasting your freon. They might be willing to use your freon if your paying them to do everything else. If they wont work with you, let me know, I know a shop here in Mesa that would probably work with you. Later, FGC __________________ FGC

05-30-2003, 07:35 AM	#3
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	A/C Once you get the truck driving take it to the shop and let them pull vacuum on it check for leaks and drive it home and filler up with R-134 A. __________________ 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.

05-30-2003, 08:43 AM	#5
ddsmith Glowing since 1978 Join Date: Mar 2001 Location: Lusby,MD,USA Posts: 532	They pull it into a deep vacuum. Basically removing everything that will boil at very low vacuum.(freon, moisture) As long as no leaks exist in your system this will work. I will caution you to ensure that the lines you connect for charging at home are purge with a small flow of freon to the environment just prior to hooking to the connection on the truck. This will blow out any air/moisture sitting in the lines and then all you'll be charging is freon. That first can of freon charges real fast because you are essentially breaking the vacuum in the system with the first can. Good luck. __________________ 66 Chevy C30 Stakebody Dump, PS,PB, 327cu in 71 Corvette Coupe 454 4 speed 69 Chevy C20 Custom Camper

05-30-2003, 11:24 AM	#6
Yellow Cheyenne Registered User Join Date: Jun 2001 Location: Eastern Kansas Posts: 488	Systems using R134 are much more sensitive to needing the correct amount of freon to work correctly. Too much or too little and it won't cool right. For some reason, the sight glass method doesn't work for 134. May want to see if they would use yours. If not, just keep it to top off the system in the future when a little leaks off. __________________ '72 Cheyenne. AC, PS, PB, Rear slider window, tilt. Light yellow (grapefruit yellow according to new sales literature from '72) '56 Chevy short step V-8 (My dad bought it new!!) '70 Olds 442 convertible '70 Olds Rallye 350



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