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New AC compressor oil add question

Daryn67 on Fri March 26, 2010 9:31 AM User is offline

Year: 1999
Make: Toyota
Model: Tacoma
Engine Size: 2.7L 4cy
Refrigerant Type: R134a
Country of Origin: United States

I had a stupid question to ask, I could not find this info anywhere, and you guys seem sharp on this stuff... I am doing AC work on my pickup truck soon (AC compressor clutch went, high miles etc...). I am replacing with OEM compressor/clutch, expansion valve, reciever dryer, and will flush lines, evaporator, condensor before assembling the whole thing...

My question is this - The new OEM compressor comes with a bottle of OEM oil for the compressor, IS THIS CHARGE ENOUGH FOR THE WHOLE SYSTEM? Or will I ALSO have to add oil in with the refrigerant during evac/recharge?

Furthermore, should I use the OEM oil, or is there something better on the market?

Thanks, D-.

HVargas on Fri March 26, 2010 11:37 AM User is offlineView users profile

The best thing to do is to drain the oil from the compressor and measure it. The amount of oil the whole system holds is 7.0oz. So I would drain the compressor and see how much is in there. Then add 5oz. of the oil back to the compressor and the other 2oz. into the drier. Most of the time the compressor comes precharged with oil and if you add the bottle of oil on top of that you are going to run into pressure and cooling issue's if you don't have the proper amount in there.

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Edited: Fri March 26, 2010 at 11:41 AM by HVargas

TRB on Fri March 26, 2010 11:37 AM User is offlineView users profile

Total oil capacity for this system is 7 ounces. DEC PAG 46 is what is called for on this vehicle.

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Daryn67 on Fri March 26, 2010 12:26 PM User is offline

Thanks for the reply, much appreciated.

The last time I did AC work on one of my vehicles was many years ago (I have been lucky enough that I do not have frequent AC problems...), and although I have the tools and tech manuals, and I remember the big picture concepts, it's those little nuances that get forgotten.

So basically, from what I understand from what you guys explained, is have the right oil and capacity at the install, then it is not needed to add extra with the refrigerant when evac/recharge...

Thanks, D-.

TRB on Fri March 26, 2010 12:42 PM User is offlineView users profile

You may want to read Hecat's tech paper on flushing. Too much oil and debris will cause a compressor failure.

Tech Paper link.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

Daryn67 on Fri March 26, 2010 2:03 PM User is offline

Thanks again, it is a very good flush paper. Very important concepts, not only get dirt oil and debris out of system, but as he pointed out THE SOLVENTS MUST BE GONE TOO! I probably would have overlooked that myself, but after reading that flush paper, I will pay extra carful attention to that.

HECAT on Sat March 27, 2010 9:02 AM User is offline

Thanks for reading and posting your comments.

When you think it is dry, dry some more; and always test to confirm.



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FLUSHING TECHNICAL PAPER vs2.pdf 

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