Replacing seized A/C compressor...what else on a 08 2500?

[nadt770]

My compressor seized so I am replacing that. I also have a new condenser because the old one got chewed up pretty good before I added a guard. Also hear I should replace accumulator at this time as well. Is there anything else that should be done before I take it to be evacuated and recharged? Thanks.

 

[mweiman]

orifice tube should be changed also and the system should be flushed to clean out any debris from the old compressor coming apart.
Matt

 

[B.G. Smith]

Added a quart of what? Are you refering to the ac condenser? Did the ac pulley lock up or just the compressor? Most mfgs. won't guarantee the compressor without a new accumclator. It the compressor wrecked then as suggested above, system difinitely need to be flushed and orifice replaced. bg

 

[nadt770]

How is the system flushed? Is this best left to the A/C shop? I want to do as much of this myself as possible.
BG, I added a condenser guard from Geno's to protect the fins from being smashed when working at the front of the truck.
Thanks for your help guys.

John

 

[B.G. Smith]

Sorry, I misread guard for something else. System flush is usually done by flushing some compatible refrigerant through the system under pressure. If the compressor crashed, the trash will be in the condenser, it can't go any further than the orifice tube. bg

 

[sag2]

Napa generally carries the flush. You can buy it in bulk if you have the tool to introduce it into the system, or they have aerosol cans for the do it yourself market. It isn't cheap, but if you do not flush it there usually is no warranty on the new compressor. One can should do it unless it really sent trash into the lines. Google black death A/C and you will see the worst case. The new compressors make lousy filters so get it clean.

 

[Motorhead]

I bought one of these to flush out my system. http://www.oreillyauto.com/site/c/d...earch_ac+flush+kit_-1_-1&keyword=ac+flush+kit Replace the oriface tube and buy it from the DEALER only. The receiver dryer/ accumulator can be aftermarket. Add the proper oil and the proper amount in each component. Pull deep vacuum and charge.

 

[nadt770]

Thanks for the info Motorhead. Will any R134 refrigerant oil be ok or something special? How much total? I know how much for the compressor and how much in the condenser, what else.
Thanks to all you guys. Gotta get this finished, 107 here today in W. Texas.

John

 

[Motorhead]

Here are some specs from the repair manual:
A/C system oil: VC-46 PAG oil. For some reason the diesel A/C comprssor takes different oil than the gas engines. This may be when running the O.E.compressor
A/C Clutch Air Gap: 0.35 - 0.75 mm (0.014 - 0.030 in.) 5.9L engine
The TOTAL amount of oil should be listed on the A/C service sticker on the radiator support. MAKE SURE that you know if the REPLACEMENT compressor was pre filled with oil or not.
Lets just say the system takes 8 oz of oil. THIS IS JUST FOR EXAMPLE. 4 to 5 oz goes into the compressor, 2 oz goes into the receiver drier and the condensor gets 1 oz of oil. After I had my system all sealed up but NOT charged, I turned the compressor shaft, by hand several revolutions to make sure the compressor wasn't hydro locked. You can do this by putting a socket on the securing nut that holds the compressor clutch on the compressor input shaft and turning it with a ratchet the direction it is supposed to turn when it is running. Charge the system with the indicated amount of R-134A after a deep evacuation. Run the vacuum pump for at least 1 hour.
With running my A/C on re-circ, I get 40 fegrees F out of the center vent! Better than when it was new.