EMAXX620

Okay, so a few weeks ago i was wheeling up north and my ac compressor siezed up and i had to remove it and rig up a random AC bypass pulley for some random unknown car. Got home (approx 220-240 miles) on it.

since it was a sunday afternoon in a small town, i didnt have many choices of part stores or anything and didnt even think about sealing up the lines that go to the compressor. the next day, i was telling my buddy about the trip and he mentioned sealing up the lines so moisture doesnt get in, i completely forgot about that and sealed them that night. So they were unsealed about 20 hours. Also hit some rain on the way home, dont believe any got near the lines though.

question is, do you think its still safe to put a new compressor on and fill it up? or will i need to replace the other crap relating to the ac system?

TrekkerJmm

I would have it sucked down by a pro AC guy then fill it up with r134 & oil...Tj

brucebo

Mainly you just need to vacuum it. You may want to replace the dryer also. HVAC vacuum pumps are under $100 on ebay.

-Bruce

EMAXX620

will any normal shop have the equipment to do that? never even heard of that being done before, any idea on the approx cost?

brucebo

It's standard procedure. This is to remove any non-refrigerant gases, and especially moisture. Moisture, combined with R134a turns into acid, which turns into holes in your evaporator.

-Bruce

EMAXX620

oh fun, glad i didnt just swap the compressor and pump in some r134a

djb383

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.

Throttle Jockey

if you were closer, i'd say pick up a compressor and dryer and bring it over. i have all the equipment in my service truck to completely flush, evac and charge it up.

EMAXX620

yea, a bit far of a drive haha.
Can i put a new compressor on and not charge up the system (obviously not use AC) untill i can get a new dryer also? I mainly just need it so i can get rid of this bypass pulley im using, its only held on by 2 bolts and is 1/4-1/2" off from what it should be so my belt isnt near straight.

Throttle Jockey

sure. it wont work any way unless it is charged.(low pressure switch will shut it off)

djb383

Don't forget to pour any/all oil out of the new compressor before u install it.

Throttle Jockey

it wont matter, it wont run anyway.

EMAXX620

whats the point of pouring out the oil in the new one?

djb383

U must know precisely how much oil your 2000 XJ a/c system holds so u can add the correct amount to the system (dryer and compressor). Check with the dealer service dept, or FSM, for the correct amount of PAG oil. Some compressors are shipped with oil in them, some are not. R134a systems are very sensitive to the amount oil in the system.....a little too much oil and cooling performance will be poor, too little oil and...........that should be self explanatory.

EMAXX620

Thanks for all the info everyone, i guess ill run a junkyard compressor if i can find one that isnt siezed up till i can afford a new compressor, dryer, and the cost to get the system vacuumed