Automotive Air Conditioning Information Forum (Archives)

mikesignal on Sun May 26, 2013 11:55 AM

Year: 2000
Make: Jeep
Model: cherokee sport
Engine Size: 4.0
Refrigerant Type: r-134
Country of Origin: United States

Hi. I have just installed a new evaporator core and a new accumulator on a 2000 jeep cherokee sport, 4.0. The compressor is only 2 months old. I have removed the compressor and drained all the old oil out. The compressor says it requires 6.5 ounces of pag 46. I was told by the auto parts store that the jeep is supposed to take pag 100, but I am thinking it depends on the compressor requirements. Which one should I use? and do I put all 6.5 ounces in the compressor?, or do I need to add some to the evaporator and accumulator? thanks.

Edited: Sun May 26, 2013 at 12:00 PM by mikesignal

WyrTwister on Sun May 26, 2013 2:45 PM

Does it now have the same brand and model of compress as came from the factory ?

God bless
Wyr

mk378 on Sun May 26, 2013 4:40 PM

Use the oil type specified by the label on the compressor. The only part that needs oil to function is the compressor.

The total amount of oil depends on the vehicle. If it's dual air there will be some left behind in the rear. Also there is some left behind in the condenser. So don't use a full charge of new oil. If you can't fit all the new oil in the compressor, put the rest in the accumulator. Turn the compressor by hand after hooking it up to be sure it is not hydro-locked with excess oil. Then evacuate and get in as close to a full charge of refrigerant as you can before running the compressor for the first time. Using oil with UV dye in it is recommended to make it easier to find leaks in the future.

mikesignal on Sun May 26, 2013 10:19 PM

thanks.

wvmedic on Sun May 26, 2013 10:42 PM

mk378, I was going to ask the same question. I'm replacing the evaporator, orifice tube and accumulator on a 1997 Jeep Cherokee. From a chart I've seen it suggests 5 oz of oil, so just use a funnel and pour it in to the accumulator?

Edited: Sun May 26, 2013 at 10:43 PM by wvmedic