Silverado a/c oil capacities.

[kitttransam]

I have a nbs 99 Silverado 2500 LS ext. cab. I'm repairing the a/c system. My question is how much pag oil does it take for the whole system? I can't seem to find a straight answer anywhere. I seen that the compressor takes 8 oz. but you have to put oil in other parts like the drier, evap, and condenser too right? My system leaked oil out of the compressor so draining out to get the capacity probably won't be very accurate anyway. I replaced the evap and plan on replacing the drier, and replacing the seals on the compressor. And flushing out the condenser.

[Doug_Scott]

Think of the oil requirement as you would for a 2 stroke engine with gas/oil mixture for fuel. Each major component of the a/c system will have a certain amount of oil "hanging" around. It is carried by the refrigerant. When you say the compressor leaked its oil out, it also leaked out the oil for the parts as well. When you replace a defective part, it will have a recommended amount of oil that you should add to the system when recharging the system.

All my experience was with the R12 systems, no idea if the R134a and newer systems are any different, don't really see how they could be.

[Jsdirt]

Here ya go. Got a bunch of jibberish when I posted. Having all kinds of friggin problems on this forum lately!!!

 

Fixed it ...

 

First number is refrigerant amount, oil type in the middle, last number is oil amount - both in ounces.

 

1994-1999

 

All Engines - Crew Cab ... R134a 36.00 - PAG 150 - 8.00

 

All Engines - Standard Cab ... R134a 32.00 - PAG 150 - 8.00

 

Don't put the entire amount in the compressor. Also, before you install the compressor, even if it's BRAND NEW, flush it out with the oil you plan to use. Fill it, and turn the compressor by hand, dump it, repeat - THEN install it.

 

I'd do 3 oz in compressor, a couple in accumulator and condenser, and a half oz. in each line/hose. Can do it anyway you want, just spread it out.

Edited April 13, 2015 by Jsdirt

[kitttransam]

Don't know if those years applie to mine. My truck is the 99-02 style truck

[Jsdirt]

2003-2004 All Engines - w/ Denso Compressor ... R134a 25.50 PAG 46 8.00

 

2002 All Engines - w/ Denso Compressor ... R134a 29.00 PAG 46 8.00

 

2000-2001 All Engines - w/ Denso Compressor ... R134a 29.00 PAG 46 8.00

 

All Engines - w/ HT6 Compressor ... R134a 32.00 PAG 150 8.00

 

 

Here's a link to the site: http://www.techchoiceparts.com/refrigerant-and-oil-capacities/chevrolet-light-truck

Edited April 13, 2015 by Jsdirt

[gmtech4]

I have a nbs 99 Silverado 2500 LS ext. cab. I'm repairing the a/c system. My question is how much pag oil does it take for the whole system? I can't seem to find a straight answer anywhere. I seen that the compressor takes 8 oz. but you have to put oil in other parts like the drier, evap, and condenser too right? My system leaked oil out of the compressor so draining out to get the capacity probably won't be very accurate anyway. I replaced the evap and plan on replacing the drier, and replacing the seals on the compressor. And flushing out the condenser.

You know the tech recovering the system will record the oil removed right ?

 

You know the the tech charging the system will put oil in right ?

 

You know the tech knows what he's doin right ?

 

If yes , why is the amount important to you ?

 

Weird is all imo

[kitttransam]

If I had a tech doing it I wouldn't be asking. And no freon in the system. All leaked out. I'm doing this myself. Sorry ain't got a ton of money laying around so I can pay someone else to fix it.

[Doug_Scott]

You know the tech recovering the system will record the oil removed right ?

 

You know the the tech charging the system will put oil in right ?

 

You know the tech knows what he's doin right ?

 

If yes , why is the amount important to you ?

 

Weird is all imo

 

 

Last time I worked on A/C we were still on R-12 and no one recovered refrigerant. We were taught to drain slowly to avoid losing the oil. Any humidity was removed by the 30 minutes of vacuum. If the oil was contaminated, then the system was likely already empty from the compressor having a hole in it or seized. Those ones were a pain, a/c service machines were pretty basic. Have not seen any of the current line of a/c service machines, sounds like they make it pretty much fool proof.

[Jsdirt]

I have yet to use a recovery machine. I still operate old school.

 

Looky what I just scored ...

 

Edited April 13, 2015 by Jsdirt

[grampadirt]

I have yet to use a recovery machine. I still operate old school.

 

Looky what I just scored ...

 

Damn,you got lucky.Is it full? Sure it's not bbq propane just rebadged

[gmtech4]

If I had a tech doing it I wouldn't be asking. And no freon in the system. All leaked out. I'm doing this myself. Sorry ain't got a ton of money laying around so I can pay someone else to fix it.

It doesn't cost a ton of money to have it charged with oil and R134 at a garage ..

 

How are you going to do it ?

[Bobby Gee]

2002 chevy Silverado 2500 HD. How much Pag 46 oil goes in my A/C system ?

[Tom Vincent]

I just installed a used ac compressor into my 1996 GMC Sierra 2500. I don’t use the air conditioner at all and don’t plan on using it in the future. Do I still need to put Pag 150 oil and Freon into the system or will the compressor run okay for without it or will I damage it operating it that way.