recharging ac ???
 

its a 91 civic


on the bottle of super cooler i got it says to hook it up to the low presure line ?? which one is it. on the fire wall there is a top one bigger and a botom one thats littler. this is my first car with ac. :8

Re: recharging ac ???
 

It's the smaller one of the lines, it has a cap with an L on it for low pressure. If it's a 91 and the ac is fucked, charging it isn't going to do much. you most likely have a fucked up component of the ac system.

Re: recharging ac ???
 

ya, just dump a bunch of that stop-leak refridgerant.

Re: recharging ac ???
 

If its a 91 i think it has R12 instead of R134a but i dont know for sure. If so, your pretty much screwed.

Re: recharging ac ???
 

You probably have to convert it first which means drain all the ---- that's in it out and put new 134a in and since you're doing it yourself, it's not going to be that great since you can't pull vac on the system before you charge it. :-\
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Re: recharging ac ???
 

Vaccum whatever is in there and fill it up with R134a.
I charge it on the low side.

Re: recharging ac ???
 

I think everybody charges it on the low side. You're gonna have to get rid of that oil in the compressor. Disconnect some ---- and blow it out with some air or something at least.

I *just* (as in 5 minutes ago) got done working on my miata AC. Bit the bullet and bought a harbor freight manifold gauge set (the quality surprised me) and a HF special compressor-powered vacuum pump. Air seems to work well but it's only like 70-80 outside and its near 100 during the day so I'll have to wait till tomorow for the true test.

Anyways enough about me. Yeah get the old oil out, get some new oil and R134a and a r12-134a adapter for your low pressure side. Put some oil in there, then turn your AC on and start dumping refrigerant in there. If im not mistaken, you want to shoot for ~35psi. More pressure doesnt necessarily mean colder and you definetly dont want to piss off the compressor by feeding it too much pressha.

If you want to go all out, get it vacuumed before you refill. A step up from that would be replacing the receicer/dryer aka accumulator. When I replaced it in my wagon, the AC got at least 15 degrees cooler.

AC is one of those things where if you half ass it, it can bite you in the ass then you gotta go through all that ---- over again to make it good. Sucks but its the truth. :(

Re: recharging ac ???
 

dont you think if there was a l on the cap i would have figured that out you ------- ---- face
cool thanks

Re: recharging ac ???
 

Where did you get the vac pump? Does it connect to the gauge set? I almost bought a nice set, but decided to cheap out and just get the gay ass can with the cheesey guage on it. :1 A/C is so important out here that it would be worth it to have the right tools.
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Re: recharging ac ???
 

---- You cock sucker looser driving that piece of crap with your shitty fight record who cares :1

Re: recharging ac ???
 

Just take it to a shop. I think they only charge like $25 to do a discharge. Then just refill yourself.

Re: recharging ac ???
 

It doesn't work that well on a completely discharged system without a vac pulled first. When it's 125* outside it matters, but if you don't need your AC to work 100% than it's probably ok to do that. :l
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Re: recharging ac ???
 

you dont have to do a damn thing but empty the old freon and put in new. dont worry about the oil. putting a vacumme on the system will make it work better but the oil doesnt matter. that is straight form the manufacturer.


now all that said those recharge cans suck. i have installed custom ac systems into planes that were never meant to have them and i cant get those things to make the ac work like it should, but when i use the machine at work its like new

damn im tired and hopefully spelled everything close to right

Re: recharging ac ???
 

What's the difference between the 134a in the can and the 134a at your work? ???
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Re: recharging ac ???
 

honestly i dont know. its the same ----, but i am guessing when i use the cans i dont have any way to put a vacumme on the system

Re: recharging ac ???
 

Hmmm....I wonder how much it would be to get my system drained, vac'd and charged? :l I have a digital thermo on my vent and it doesn't get much colder than ~46* at best. If I come to a stop it will go well above 50*. :(
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Re: recharging ac ???
 

Back when I had my 91 Civic hatch we had the ac discharged and just refilled with new R13. Worked fine till the day I traded it. It would get so cold that on high I could blow hot air from my mouth and it would "fog".

Re: recharging ac ???
 

your supposed to replace the accuumulator dryer like stated earler flush/vac all the lines and refill with the correct weight pag oil for 134. o ya dont forget to replace all the o rings as well. thats if you want to do it right you might be able to get away with just throwing some refigerant into that beast and it may blow cold for a while.

Re: recharging ac ???
 

yup it connects to the gauge set. The gauge set and vac pump was like 60 ------ bucks. I was only able to pull -20 with my ---- harbor freight compressor and ---- harbor freight vacuum pump tho. Held it for a good 2hrs or so.

Re: recharging ac ???
 

Damn, the guage set alone that I was looking at was $99.95 and it didn't come with a vac pump or anything else or I probably would have bought it. :l
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Re: recharging ac ???
 

when you have your ac system worked on they only have to make it get 40* colder than the ambient air temp. so on an older system that the average shop works on dont expect more than 50* out of the vents on a 90* day. a good working system can put out 37* at anytime though. but your ---- has to be perfect for that.



just to add, i see a lot of people talking about the "right way". yes, if you have the cash you should change every o-ring in the system, change the oriface tube, flush the system and use the proper oil. but i have done it plenty of times, where i just took the freon out, put a 30 inhg vacumme on the system and then put the proper amount of freon in. i can get 40* out of the vents with that method and thats on an airplane where the systems arent near as efficient as a car systems

Re: recharging ac ???
 

I'm going to put the thermo on my GF's car right now. Her car blows ------- ice crystals. I'm a ------- eskimo and I get cold in her car. I'll see what hers puts out compared to mine. I'm sure hers is blowing in the ~30* range.

I agree about the "right way". That's like saying you have to build your motor to run boost. Sure, it will be safer to run more boost, but we build $300 turbo kits. Why the ---- would be put $1000 into a motor we plan to blow up and replace for $100? :1 If the o-ring isn't leaking, why the ---- would you replace it? :1
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Re: recharging ac ???
 

HMT A/C vacuume pump = vac line from the intake manifold, start the engine and poke a small screw driver into the hose to push and hold down the valve while the engine pulls a vac on the A/C system. Dont need to buy a $60 vac pump when there's allready one under the hood.

Re: recharging ac ???
 

Does that work? ???


::runs to the garage::
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Re: recharging ac ???
 

The car I did it to is still blowing cold a year later. The engine pull's a vacuume really close to what the real pumps pull anyways.

Re: recharging ac ???
 

well, at idle the intake vacumme is at the level(or close to it) an ac system should be just before a recharge. it should work. it would be kinda hard to make a hose to do it, but im sure it would work

Re: recharging ac ???
 

I just used a regular hardware store hose (clear). slipped it over the low side and pushed a really small flat head screw driver threw it to hold down the valve to open it.

Re: recharging ac ???
 

---- man i bought one if those r12 to r134a converter kits and the pieces that it gives you you can only hook up the recharge can to the top tube/bigger one

Re: recharging ac ???
 

I hear what you're saying but its not as simple as that. From my understanding the R12 o-rings arent compatible with the PAG oil or something and can get eaten away. If your ---- is already empty, it's 100x more convenient to go ahead and replace the o-rings just like it's convenient to change your oil pan gasket while you've got it out tapping it. The whole vacuuming out the system removes air and water from the system. You don't want coolant in your engine oil just like you wouldnt want air and water in your refrigerant.

If you just put some stop-leak and fill with r134a, your air will likely work and likely be trouble-free but it would work better with the junk evacuated.

I've built a couple $500 turbo kits but I wouldnt cut corners say on using an FMU instead of a chipped ECU or risk running junkyard injectors or a blocked fuel filter.

Re: recharging ac ???
 

the one it fits is the right one. putting it on the high side would just explode the can. they wouldnt give you a way to connect to the high pressure side

Re: recharging ac ???
 

I would say 90% of the people on here have used or are currently using "junkyard" injectors. :l
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Re: recharging ac ???
 

i have dsm fo-fiddys

Re: recharging ac ???
 

I have a 93 subaru legacy. The ac compressor was siezed when I bought it. I bought one from the junkyard, threw it on along with the retrofit fittings to convert from r12 to r134, filled it up with cans from discount auto parts, 3.99 per can. Ac has been ice cold since I charged it in november. I live in south florida, summertime all the time. Ac is a must. I must of done about 15 cars like this without changing oil from the ac systems and without changing seals.