calvin280zxt Posted July 7, 2012 Share Posted July 7, 2012 Not a z, i tried joining a truck forum but i gave up. everyone here is more knowlegable anyway. Its a 97 chevy 4x4 380000 kms, i changed a transistor in the heat/ ac controls so they work now and i just recharged the system to the correct pressure with some r12a, and it works clutch kicks in and all that. It still doesnt get very cold at all though, it is definatly cooler than outside but now what it should be ive cleaned the condensor and everything and its got air moving through it so i dont know what else it could be thanks in advance Quote Link to comment Share on other sites More sharing options...
MazerRackham Posted July 7, 2012 Share Posted July 7, 2012 Could be gunk in the heater core. Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted July 8, 2012 Share Posted July 8, 2012 Some systems blend cold air and warm air with a door called the blend air door.This could be stuck in an incorrect position.Is the suction line out of the evap core cold?Is water going through the heater core when its not supposed to be?Find a service manual with diagram of airflow and water flow and vacuem control Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted July 9, 2012 Author Share Posted July 9, 2012 I have checked all that, the cooling system itself is not performing properly Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted July 10, 2012 Share Posted July 10, 2012 Are you sure your system uses r12? Anything newer than '95 uses r134a Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted July 10, 2012 Author Share Posted July 10, 2012 R12a is a universal replacement for all systems so it says. Cant even get r12 Quote Link to comment Share on other sites More sharing options...
chuckles Posted July 31, 2012 Share Posted July 31, 2012 that universal stuff is crap.. Get what it was designed for. I've tried that for R12 and 134A systems and it never really works that well. Quote Link to comment Share on other sites More sharing options...
ZT-R Posted July 31, 2012 Share Posted July 31, 2012 Hook up some gauges and see what kind of pressures your getting. If pressure is high try spraying water on the condensor. Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted August 4, 2012 Author Share Posted August 4, 2012 Yea, r12 a sucks. Going to bite the bullet as the system leaks anyway only lasts a couple weeks. Also leak sealer sucks to. Will have to let the pros dig in Quote Link to comment Share on other sites More sharing options...
chuckles Posted August 4, 2012 Share Posted August 4, 2012 You can get R12 on Ebay.. http://www.ebay.com/...erant&_osacat=0 If you can fix the leak, and the system only needs a couple cans, it's much cheaper to fix then retrofit it. Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted August 4, 2012 Author Share Posted August 4, 2012 I dont need r12 it takes 134a and r12a is a universal replacement Quote Link to comment Share on other sites More sharing options...
chuckles Posted August 4, 2012 Share Posted August 4, 2012 yeah, it's a 97.... nevermind. Quote Link to comment Share on other sites More sharing options...
rejracer Posted August 9, 2012 Share Posted August 9, 2012 Ive used 12r (dura cool) and it works better than anything else. The only downside to it is it's flammable. Quote Link to comment Share on other sites More sharing options...
chuckles Posted August 10, 2012 Share Posted August 10, 2012 Yeah, it's a HC (Hydrocarbon) based refrigerant. These work ok, and the head pressures are nice and low, but the charging is tricky, and you sight glass never looks right, and they don't work as well with older TXV type systems like the Datsuns. OT type systems work pretty well in. Least from my experience. Quote Link to comment Share on other sites More sharing options...
Xnke Posted August 10, 2012 Share Posted August 10, 2012 Most of the HC based refrigerant replacements for R12 are a mix of propane and butane, and isobutane. They perform very, very well, but are highly flammable and thus are: Illegal Dangerous Really, what part of not safe isn't clearly stated in Dangerous? Imagine an evaporator leak and lighting up a smoke in the car. Wouldn't take much with the A/C blower mixing air and propane for you... Or an engine bay hose leaking, coupled with an exhaust leak in a thinwalled header or cracked manifold...won't happen if moving, but sit at a traffic light you have a fair chance, even with the radiator fan going. Or getting hit by another car and having the battery touch the hood for a moment and throw a nice spark right near your broken condenser core spewing liquid propane... HC refrigerants are dangerous in automotive systems. Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted August 14, 2012 Author Share Posted August 14, 2012 Well i dont know where being illegal came from, i just bought some at the parts store. And it didnt work that great either it was slighty above better than nonthing. In fact its the only refrigerant you can get in a little can. Maybe its because its not meant to be used exclusively as its just a top up can Quote Link to comment Share on other sites More sharing options...
chuckles Posted August 14, 2012 Share Posted August 14, 2012 This thread illustrates why I always try to put back in, what the system was designed to run with originally. Even if it requires R12. It's cheaper IMO to fix the leaks, and repair the system, and recharge with R12, than it is to convert it to some pieced together ineffecient system. If you go to that, you might as well replace the entire system with one that was designed for the refrigerant you want to use. Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted August 14, 2012 Author Share Posted August 14, 2012 Well my truck with 400k on it isnt really worth spending a bunch Of $ on, if i get it fixed proffesionally obviously thats what ill do. But in my experience they just recharge it anyway and charge you a lot more than 20$ worth of refridge just so it can leak out again Quote Link to comment Share on other sites More sharing options...
chuckles Posted August 15, 2012 Share Posted August 15, 2012 yeah, it's a challenge to find leaks sometimes, and many of the a/c shops have slackers working in them. I think you get your own refrig detector from harbor freight for less than 50 bucks... Might be an idea? Quote Link to comment Share on other sites More sharing options...
calvin280zxt Posted August 15, 2012 Author Share Posted August 15, 2012 Yea thats an idea ill check princess auto (same thing in canada) Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.