The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 08-19-2007, 04:47 PM   #1
meathead95
computer illiterate
 
meathead95's Avatar
 
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,440
help

im trying to charge the ac on my 86 but when i turn it on the clutch kicks in on the compressor for about 3 seconds or so and then it kicks off. what do you think is wrong with it?
__________________
72 2wd blazer
72 swb 4x4
meathead95 is offline   Reply With Quote
Old 08-19-2007, 05:07 PM   #2
JrRacer
Registered User
 
Join Date: Dec 2006
Location: Oklahoma City, OK
Posts: 27
Re: help

it is most likely low on freon
__________________
84 GMC LONGBED
84 CHEVY LONGBED
03 CHEVY 1500HD 4X4 CREW CAB

JrRacer is offline   Reply With Quote
Old 08-20-2007, 10:38 AM   #3
swb85
On a budget like Fred Sanford
 
swb85's Avatar
 
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
Re: help

There's a low pressure switch on the drier that keeps the compressor from turning on when the charge is low. Keep adding refrigerant, the compressor will continue to cycle until the pressure is high enough to keep it running. Make sure you have a gauge on it so you don't put too much in.
__________________
'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread
'98 Camaro z28: 370ci twin turbo 370ci build
'01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD

Last edited by swb85; 08-20-2007 at 10:39 AM.
swb85 is offline   Reply With Quote
Old 08-20-2007, 06:51 PM   #4
meathead95
computer illiterate
 
meathead95's Avatar
 
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,440
Re: help

the kit i bought had a cheap guage on the can and i put it in untill it got to the top of the green (full) area which didnt take much and quit. do you think i should keep adding it?
__________________
72 2wd blazer
72 swb 4x4
meathead95 is offline   Reply With Quote
Old 08-21-2007, 10:43 AM   #5
swb85
On a budget like Fred Sanford
 
swb85's Avatar
 
Join Date: Oct 2005
Location: Topeka, KS
Posts: 2,031
Re: help

Depends on what you're doing. Is your system r134 or r12? Are you just topping off the refrigerant or are you filling an empty system?
__________________
'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread
'98 Camaro z28: 370ci twin turbo 370ci build
'01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD
swb85 is offline   Reply With Quote
Old 08-21-2007, 05:00 PM   #6
meathead95
computer illiterate
 
meathead95's Avatar
 
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,440
Re: help

the system is r12 and had very little in it i bought a retro fit kit to swap it over to 134a and it said it could be mixed.
__________________
72 2wd blazer
72 swb 4x4
meathead95 is offline   Reply With Quote
Old 08-21-2007, 08:17 PM   #7
jermasaurus
Registered User
 
jermasaurus's Avatar
 
Join Date: Dec 2004
Location: New Lenox, IL
Posts: 442
Re: help

The compressor is most likely cycling too quick from a low charge like SWB85 said. As far as those gauges go that show green as a good charge, they dont work so great.
To charge the a/c with the proper amount i would reccomend starting from scratch and filling it to the proper amount. My 85 calls for 3.0 pounds Alldata says an 86 is 3.5 lbs? not sure about that

You're supposed to pull a vacuum on the system and all that good stuff, but you can get away without it. You may just not get the maximum cold temperature.

Good luck with that
-Jeremy
__________________
79 Jimmy slammed AKA James Down
jermasaurus is offline   Reply With Quote
Old 08-22-2007, 07:15 AM   #8
meathead95
computer illiterate
 
meathead95's Avatar
 
Join Date: Jan 2001
Location: Des Moines, IA
Posts: 6,440
Re: help

ill just put to whole cans in it today and see what happens lol............
__________________
72 2wd blazer
72 swb 4x4
meathead95 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 12:04 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com