03 BLACKOUTSSS

iTrader: (3)

...I am about to change my AC Compressor, and I will obviously have to recharge the system with freon. Chiltons manual says 3 lbs of freon (i think, I have to double check), my question to you guys is how many 16oz. cans of froen does it take to fill the system? I don't intend on bringing the truck to anyone, how many ounces of freon does to system take to fill from empty?

Thanks guys.

joshua022

iTrader: (12)

16oz=1lb

3lb=3cans

If it takes 3 cans...It would really work best to take do the work yourself and then take it somewhere and have them put it on thir AC machine and let them pull a good vacuum on it(to get all the moisture out of the system where you opened it) and then add new oil and recharge it.

Grumpy5.3

iTrader: (14)

you need to double check your amount of freon, 3lbs sounds a little high to me. But you do need o pull a good vacum on it. Can I ask why you are replacing it???

joshua022

iTrader: (12)

I tried to go by your name that you have a 03 silverado...if so, it would need 1.76lbs of freon NOT 3lbs. plus a couple ounces of oil.

bigbadwolf54

iTrader: (14)

I agree....3lbs sounds off to me, unless your doing this on on a suburban with rear air. You will want to pull a good vac on the system to get the moisture/remaining freon out as well.

03 BLACKOUTSSS

iTrader: (3)

you are right, its an 03 Silverado SS, it does have rear air, but not like the suburban rear air, I don't think. On the amount, I don't think that 16oz per can jives with the 3lbs thats in the book. I don't know. Maybe it would be best to have someone fill it. How much does that usually cost?

chevymec

iTrader: (19)

Did the ACcompressor put metal in the system??? IF it did you deff. need to flush it out and replace the orfice tube and accumulator. I would do as the other guys said and get somebody to pull a good vaccum on it. You can always jump the low psi switch to get the freon to get sucked in. 4 or 5 ozs of oil in the compressor and 2 16oz cans of freon will be fine, is the a/c label on the shroud gone?? It has the actual amount on it. if you have to flush it put some oil in the accumulator also.

03 BLACKOUTSSS

iTrader: (3)

how would I know if there is metal in the system? I wasn't going to change the accumulator, even though everything I have read said to. what originally happened (according to GM) is the clutch fan went bad and stressed the crap out of the compressor, bending a valve inside. how a mechanical fan can do that is beyond me, but I replaced the fan with efans and now have to do the compressor, its starting to warm up in florida.

adam1803

iTrader: (65)

Once you open the lines your never going to get it very cold without running the vaccum on it. Most places around here charge about $20 a pound for the refrigerant.

joshua022

iTrader: (12)

our is $10 bucks a pound but an hours labor to put it on the ac machine and vacuum it and re-charge it about 85 bucks