robertbartsch

I recently evacuated my AC system with a commercial vacuum pump. I looked all over for information on how much freon the system takes but did not find any data.

I charged it with 2.5 cans. The cans are the ones sold at K-mart.

It blows cold air and works great but I would like to know if my guess is correct? I heard somewhere that the newer AC systems do not like to be overcharged.

hink9

you can tell by locating the yellow label located in the engine compartment, i think its on the accumulator, it will tell you, youre probablly close though...gl

kickassT/A

iTrader: (3)

it's only like a pound and a half. i believe those cans are 12 oz...

robertbartsch

2.5 cans x 12oz per can b= 30 onces - installed freon

30 onces / 16 onces to one pound = 1.875 pounds - installed freon

OK so I am slightly overfilled at 1.8lbs Vs. the standard of 1.5 lbs.

Thanks for the info...

robertbartsch

PS - We really need a separate forum topic for air conditioning questions...

Please suggest this to your favorite LS1Tech moderator.....apparently, my suggestions don't carry weight....

wrencher

iTrader: (2)

28 oz is the charge.

taqwache

you are acually probably right on the money because you can never get all the freon out of those cans anyways. it is just like nitrous and follows the same pricipals when filling. once the pressure evens out, the flow will stop. because of this, the very last can will not get all the freon out of it.

robertbartsch

Thanks.

Why do new cars have ice cold air and after a few years they don't cool as well as when new?

If the condensor fins are not clogged with road junk and the system is fully charged I would expect the ability to cool would not change with age. Since my system blows cool air now, I probably should not worry too much if it is not quite as cold as it was when it rolled off the dealer lot; right?

I wish the bone heads who ran this Board would create a separate topic area for air conditioning questions - we have covered every area except AC - this is dumb.

wrencher

iTrader: (2)

The system can also be moisture ladden,this decreases performance. A clean condenser yes is also important, as is sytem pressures.
Any time the sytem is left empty, it is recommended the accumulator/drier is replaced. I'd replace the oriffice tube as well.
Also that once all parts are installed & system closed that a vacuum be drawn on the system for an hour. That boils out any open moisture in the sytem brought in by left open to the air. A accumulator will absorb moisture if left open to the atmosphere, in about 15 minutes it will be junk. Once moisture is in the dessicant material of the accumulator/drier you cannot get it out.The A/C system needs to be checked & serviced correctly to get the optimum performance from it.

robertbartsch

OK; thanks. I think I will replace the accumulator/drier and pump down the system for a few hours with a commerical vacuum pump and then re-charge.

Tom@SpeedInc

iTrader: (5)

Rob I told you to have a pro evac and recharge your AC. Your going to have to look at pressures to see if you charged right. ALL AC systems dont' respond well to overcharged or undercharged you get the same problems both ways.

HFC-134a is a smaller molecule and leaks easier, infact they leak from day 1 not much but enough over years to need recharged after 5 years.

The only proper way to charge a system is with a scale.