MiamiMJ Posted February 23, 2016 Share Posted February 23, 2016 I recently bought an 89 4.0 LWB and I'm working my way through some odd things that were done to it. The PO converted the A/C and I noticed this, mounted to the firewall, to the left of the heater hoses. I've not seen this before on a Cherokee, and am just now getting acquainted with the Comanche. Can anyone tell me what I'm looking at? Appreciate the help. Link to comment Share on other sites More sharing options...
Marine1Texas Posted February 23, 2016 Share Posted February 23, 2016 that is a expansion valve of course it is not stock for your Comanche. it is the same kind of design that is used on most house a/c units, I have seen people use them before on car a/c lines and work just fine. If I am not mistaking there is a hose clamp on the other side of the a/c line coming out under the Radiator fill bottle, that will not hold the pressure. that for sure will need to be replaced. Link to comment Share on other sites More sharing options...
Akula69 Posted February 23, 2016 Share Posted February 23, 2016 Noriyori_Kudo, on 22 Feb 2016 - 9:36 PM, said: that is a expansion valve of course it is not stock for your Comanche. it is the same kind of design that is used on most house a/c units, I have seen people use them before on car a/c lines and work just fine. If I am not mistaking there is a hose clamp on the other side of the a/c line coming out under the Radiator fill bottle, that will not hold the pressure. that for sure will need to be replaced. Correct. You'd do well by stripping an entire system out of a MJ (or XJ of similar age range) out of the yard, replacing the evaporator,heater core and accumulator. The hoses alone are getting harder and harder to find intact. Of course, you can drop some serious coin on new ones.... Link to comment Share on other sites More sharing options...
ParadiseMJ Posted February 23, 2016 Share Posted February 23, 2016 A/C components are not that expensive. Buying a new expansion valve, accumulator/dryer, and hoses might set you back ~$100. Whoever put that in was doing a serious gyppo job...what did the PO convert the A/C to ? I doubt if it worked. Just get all the right parts together, take it to an A/C place to evacuate and flush the system and button it up with r134a orofices. Then you can replace the parts...then take it BACK to the A/C place and have them fill it with 134a. Link to comment Share on other sites More sharing options...
MiamiMJ Posted February 23, 2016 Author Share Posted February 23, 2016 The worst part is that the PO has a receipt for the R134 conversion. So much for hiring a pro... I'll start gathering parts/hoses and reading up on A/Cs. Thanks for pointing me in the right direction. Link to comment Share on other sites More sharing options...
Jess Posted February 25, 2016 Share Posted February 25, 2016 If you're replacing the Evap core you might see if you can find some measurements before ordering one. I just shipped back a UAC unit (UAC EV 4177ATC) that was listed as fitting my year but wasn't even close. I don't know how many HVAC boxes they used or why they would be different so I can't say it wouldn't fit yours but I have the same expansion valve setup as you so who knows. Link to comment Share on other sites More sharing options...
Marine1Texas Posted February 25, 2016 Share Posted February 25, 2016 mine even looks more different then those 2 above. from the look of it, the box would be much smaller for the copper r12 one. was it a none a/c upgrade from PO? I put a 1988 hvac box with a/c in my non a/c system and it was much wider box! Link to comment Share on other sites More sharing options...
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