charging ac? - YotaTech Forums

86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

charging ac?


Old 06-08-2008, 07:25 PM
Registered User
Thread Starter
Evil.Dingo's Avatar
Join Date: Jun 2008
Location: PA but my heart is still in CO
Posts: 321
Thanks: 0
Thanked 0 Times in 0 Posts
charging ac?

I need to charge my system. What are the recomendations? I was thinking of hot shot but I would like to here what others have used and what works the best.
Evil.Dingo is offline  
Reply With Quote
Old 06-08-2008, 08:33 PM
Registered User
86tuning's Avatar
Join Date: Jul 2007
Location: Vancouver, BC
Posts: 738
Thanks: 0
Thanked 0 Times in 0 Posts
If your rig has been converted to R134a already, you can simply go to walmart and pick up a couple cans of R134a and fire it in through the low side port

Start the truck up, turn a/c to max, then fire in more until the bubbles in the sight glass disappear.

Ta da.
86tuning is offline  
Reply With Quote
Old 06-08-2008, 08:44 PM
Registered User
Noltz's Avatar
Join Date: Mar 2008
Location: Ontario, Canada
Posts: 379
Thanks: 0
Thanked 0 Times in 0 Posts
I don't like those top-up cans. Too much that can go wrong. One customer brought in his Caravan yesterday; "It's not cold, even though I topped it up". He had overcharged it. The high side was pushing 450psi, and the compressor safety switch would trip after a few seconds of compressing.

Our shop charges $40 to inspect the AC system, read the pressures and find any leaks. $120 get's you a complete Evacuate, Vacuum (remove moisture) and recharge. $60 for cans, $120 for the professional to do it.

Last edited by Noltz; 06-08-2008 at 08:47 PM.
Noltz is offline  
Reply With Quote
Old 06-09-2008, 01:32 AM
Registered User
Robrt32's Avatar
Join Date: Jan 2007
Location: Mississippi
Posts: 413
Thanks: 0
Thanked 0 Times in 0 Posts
Most will tell you what i done wont work and might not for you.. But i had a bad compressor.. Took one off a motor laying on the ground, put it on, Charged it up with no vacuum pulled.. cools good.. BUT if its not already converted to 134 the adapters that come in the kit are useless.. I went to a John Deere dealership and bought the fittings they use on tractors.. MUCH BETTER MADE.. cost me 20 bucks for the fitting but well worth it.. I done this 2 or 3 years ago.. still cools good.. 39 degrees at the vents.. Your results may vary..
Robrt32 is offline  
Reply With Quote
Old 06-09-2008, 01:36 AM
Registered User
apalmer1's Avatar
Join Date: Nov 2006
Location: Bend, OR.
Posts: 652
Thanks: 0
Thanked 0 Times in 0 Posts
If your going to charge your AC yourself you should look at the identification and or retrofit stickers, find out the quantity, and then add refridgerant very very conservatively. what ever you do DO NOT buy the refridgerant that comes with sealer in it, many of the cans you get at wallmart, shucks, autozone, et. use sealer. If you put that sealer in your system you basicaly condem it from ever being worked on again because that sealant will destroy a recovery machine at a shop, and needs to be extracted with a special machine into a different bottle. most shops wont even touch it.
apalmer1 is offline  
Reply With Quote
Old 06-09-2008, 08:42 AM
Registered User
InternetRoadkill's Avatar
Join Date: Jan 2006
Location: San Antonio, Texas
Posts: 1,159
Thanks: 0
Thanked 0 Times in 0 Posts
It's normal for 134A to show bubbles in the sight glass. If you charge until the bubbles disappear, you'll be way overcharged. You really need gauges to do this right.

I found on mine that a low side pressure of 25psi low-side works great with 134A on a converted unit. (90 degree outside temperature, radiator still cool.)
InternetRoadkill is offline  
Reply With Quote
Related Topics
Thread Starter
Last Post
86-95 Trucks & 4Runners (Build-Up Section)
06-16-2016 04:05 PM
95.5-2004 Tacomas & 96-2002 4Runners
10-14-2015 04:54 PM
86-95 Trucks & 4Runners
10-01-2015 10:24 AM
General Electrical & Lighting Related Topics
09-20-2015 10:00 AM
86-95 Trucks & 4Runners
09-17-2015 09:07 AM

Thread Tools
Search this Thread
Quick Reply: charging ac?

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: