I have replaced my compressor, condenser, receiver/dryer and expansion valve. Is it really necessary to perform an AC Flush. Maybe just flush the Evaporator???

 

Are you replacing due to a leak or a compressor locking up?
Leak
I would say you are good
Comp.
Then you should flush.

 

Whatever is new doesn't need to be flushed, everything else does.

 

Bought the vehicle not too long ago , AC didn't work. Had it checked out, clutch on compressor was sheared. I went a head and replaced all the main components other than the evaporator and hoses. So do the hoses get flushed individually as well? I have not put on my heater control valve or expansion valve, I was going to have that done at a shop, along with the flush, leak test and charge, I was quoted $615, I'm already in this $500 so far.

 

definately flush the hoses as well as everything you did not install new.

 

I presume u r converting from R12 to R134a. Here's a write-up I posted in another thread. Hope it helps. Again, any old parts, lines, etc. need to be flushed for best results. Some of this may/may not apply to your '93.

If u really want to do it up right, for max cooling results, here's how:

Separate the 4 quick connects (2 @ evap & 2 at cond) and 1 bolt at dryer
Remove the old dryer (it's a filter and probably has compressor shrapnel in it)
Remove the old liquid line/orifice tube (it's also a filter and probably has compressor shrapnel in it)
Pour a/c flush into the evap and cond and blow both out with compressed air
Turn new compressor upside down and pour any/all oil out and re-install
Determine correct amount of PAG compressor oil for a 2000 model XJ
Pour 1/2 of the new PAG oil into the new dryer and 1/2 into the new compressor
Using new o-rings, re-connect everything, double/triple check everything, take your time
Take it to a pro, tell them u added compressor oil and want a vacuum pulled and the system charged with new R134a (without oil)

Kwick Kar Kwick Lube did the vacuum/freon re-charge for $80 on our '98 XJ using their fully automated a/c machine. We now have 34F cold air at the center dash vents.

 

Thanx for the input guys. We'll see how it goes, I'm just trying to get some cold air in my Jeep (seeing I live in Southern AZ), with out paying more than my jeep is actually worth!!