For starters my system was swapped over to 134a in 2001.So now that my engine swap is done i need to recharge my a/c system and was wondering: A-how can i make sure i do not have any leaks before recharging it ? I dont wanna blow the money if its all gunna leak out.B-i have heard that you have to put a vacuum on the system before you can recharge it,is this true ?And C-can i simply go to the parts house and get 2 pounds worth of 134a ? The service sticker from the retrofit says that they put in 2.0 lb's so one would only assume i would put that much back in ? My original compressor says it requires 8 ounces of oil,is this built into the 134a,or does this change between r12-134a ? I guess onces we get through these questions i may have more,please help it's hot around here and i have a 5 month old baby.
estin
As long as you need a recharge I'd replace the "O" rings on the lines...assuming the compressor isn't leaking, and flush the system. Of course if the system is crap, I'd replace the drier and orfice tube. I've used the cans of R134 in the past but had limited success because of the leak. I'd spend (and I did:haha: ) the money and have it vaccumed and recharges at a shop.
yes, its true that the system should be vacuumed down before a recharge.... if you just wanna do a quick charge, there are a few ways to go about it. obviously, you dont have the same type of equipment that a shop has, so you can simply do some math. depress the schrader valves at the service ports to insure there is no freon left in the system, and purchase enough cans to do the job. The cans generally come in a few sizes (most commonly 12 oz and 9 oz.) if it takes 2 lbs, thats 32 oz., so you would get 2-12 oz cans and a 9 oz (thats 33 ozs but you wont get every oz out anyway). if they dont come with it, you can get a cheap charge line, that peirces the can to allow the freon out. put the line on the low side service port, turn the air on max, and let the compressor pull the freon out. remember, gravity is your friend, so hold the can high, and pierce it very low on the can. its not rocket science, as long as you don't overfill the system, and dont charge thru the high side port, you'll be fine
I suggest you take it to a shop. The procedures you describe require specialty equipment, and training, for the reasons being that you get your system fixed right, and that you don't injure yourself. The high side of an AC system is nothing to play around with. It can cause a lot of damage if a line or component busts.
$40?? are you sure this is a reputable guy? most shops charge an average of 75 bucks an hour... with replacing the oriface tube, vacuuming the system down and refilling with freon you should be looking at about 2 hours labor.... if he's doing it for $40 make sure he knows what he's doing
He is a friend of mine,and owns a restoration shop and is the "go to guy" for a/c's in my town.The other a/c guy in town quoted me $65 + materials so i drove over to my buddies and told him that i had pulled my front clip,and now that i had it all back together i needed my a/c charged back up....i ask if i got the freon what it would cost and he told me i was "pissing my time/money away if i didn't replace the orifice tube." And that you cant just add freon after pulling it all apart like i did,that it needed flushed,then vacuumed then oil,and freon added and also said that alot of people think you can just add freon and go on but that that you have to take into account the outside air temp and a lot of other jibber jabber that i got lost on.....Basically he told me to bring him $100 and whatever he had left after the quoted $40/freon/oil/orifice tube he would return.Does the whole outside temp thing sound rite to you guys ?
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