xj-digest Thursday, June 9 2005 Volume 01 : Number 2111 Forum for Discussion of XJ cherokees and wagoneers Brian Colucci Digest Coordinator Contents: Re: xj: function of an AC clutch Re: xj: function of an AC clutch Re: xj: The Big XJ Chill Re: xj: function of an AC clutch RE: xj: function of an AC clutch xj: XJ cooling Re: xj: XJ cooling xj: The Big XJ Chill #2 xj: Re: XJ cooling Re: xj: 96 ZJ oil pressure xj: '97 XJ dash/instrument cluster needed XJ Digest Home Page: http://www.digest.net/jeep/xj/ Send submissions to xj-digest-at-digest.net Send administrative requests to xj-digest-request-at-digest.net To unsubscribe, include the word unsubscribe by itself in the body of the message, unless you are sending the request from a different address than the one that appears on the list. Include the word help in a message to xj-digest-request to get a list of other majordomo commands. ---------------------------------------------------------------------- Date: Wed, 8 Jun 2005 08:07:16 -0700 (PDT) From: Ed Kummel Subject: Re: xj: function of an AC clutch Thanks, The gauge kit I bought only has a coupling that will fit the low-side fitting...and that gauge is color coded with green reading up to 25 psi (add refridgerant) Blue, 25-44 psi (proper amount of refridgerant) and then yellow and red... (bad mojo areas) I popped the connector on the (dryer) that rounded cylinder thing behind the alternator...and jumpered the contacts to get the compressor to run continuously. Then put almost an entire 14 ounce can of r134a into the system...now it blow cooler (no where near as cold as the r12a in my 89 jeep, but cold enough). For those looking for the relay fix for pre-91 jeeps, go here and follow these instructions...It makes a big difference! http://jeepsunlimited.com/xj/ACrewire/rewire.htm Ed web/gadget guru - --- Mike Petersen wrote: >> Your AC cycling problem sounds like low suction >> pressure. Are you sure that >> you were reading the low side?? Low side pressures >> on a 134 system should be >> about 60 to 65 psi and the high side should read >> about 250. >> >> There usually is a suction pressure switch that >> shuts the compressor off to >> avoid damage when the charge is low. I did three of >> these yesterday. >> >> Mike >> ----- Original Message ----- >> From: "Marc" >> To: >> Sent: Tuesday, June 07, 2005 9:05 PM >> Subject: Re: xj: function of an AC clutch >> >> >> Ed, I'm sorry I cannot answer you're question. But, >> I'm >> curious about the older XJ fix, I have an '89. I >> have a >> problem where mine cools for a while and then >> doesn't. >> >> Marc Z. >> >> Ed Kummel wrote: >> > >>> >OK. Yesterday was a scorcher out here on the east >>> >coast. My latest acquisition is a 1996 Grand > >> Cherokee > >>> >Limited. Nice Jeep (almost not a Jeep though, if > >> you > >>> >know what I mean) >>> >We wanted to drive in style with the AC going but >>> >found that it doesn't seem to work quite right. >>> >I remember some discussion about AC stuff on here a >>> >few months ago and perhaps someone may have some >>> >answers for me. >>> >Here is what's happening. >>> >Turn the AC on and set the temperature to a low >>> >setting. The AC clutch will cycle on for about 2 >>> >seconds, then cycle off for about 5 seconds, then > >> on > >>> >for 2 seconds, then off for 5 seconds. It will do > >> this > >>> >over and over...The low pressure line will get > >> *cool* > >>> >but not COLD. I put a pressure gauge on the low >>> >pressure side and when the compressor cycles on, it >>> >reads about 125psi, when the compressor cycles off, >>> >the pressure reads about 130psi. There's > >> refridgerant > >>> >(r134a) in the system (I couldn't find the watch > >> glass > >>> >to verify, but the pressure's good). I pulled the >>> >relay to check if there's a bad contact, but that's >>> >good too... >>> >So, here's my question. The normal function for a >>> >compressor in a '96 Jeep running r134a coolant. > >> Should > >>> >it cycle on and off like that? And if so, why am I > >> not > >>> >getting any COLD air? It get's cooler than a 150 >>> >degree car interior, but not COLD. >>> >I remember on the older Jeeps (XJs, I have a 90 and > >> 89 > >>> >xj) there was a relay fix that kept the compressor > >> on > >>> >continuously...I performed this mod on both Jeeps > >> and > >>> >they run colder with this mod. Is there something >>> >similar I need to do with this one too? >>> > >>> >Thanks for the info (in advance) >>> > >>> >Ed >>> >web/gadget guru >>> > >>> >"I'm not an expert, but I *did* stay at a Holiday > >> Inn Express once..." > >>> > --Holiday Inn Commercial >>> >Tired of spam? Yahoo! Mail has the best spam > >> protection around > >>> >http://mail.yahoo.com > >> "I'm not an expert, but I *did* stay at a Holiday Inn Express once..." --Holiday Inn Commercial Stay connected, organized, and protected. Take the tour: http://tour.mail.yahoo.com/mailtour.html ------------------------------ Date: Wed, 8 Jun 2005 08:08:36 -0700 (PDT) From: Ed Kummel Subject: Re: xj: function of an AC clutch here you go Marc, I performed this fix on both my 89 Wagoneer LTD and my 90 Cherokee Sport. It makes a big difference: http://jeepsunlimited.com/xj/ACrewire/rewire.htm Ed web/gadget guru - --- Marc wrote: >> Ed, I'm sorry I cannot answer you're question. But, >> I'm >> curious about the older XJ fix, I have an '89. I >> have a >> problem where mine cools for a while and then >> doesn't. >> >> Marc Z. >> >> Ed Kummel wrote: >> > >>> >OK. Yesterday was a scorcher out here on the east >>> >coast. My latest acquisition is a 1996 Grand > >> Cherokee > >>> >Limited. Nice Jeep (almost not a Jeep though, if > >> you > >>> >know what I mean) >>> >We wanted to drive in style with the AC going but >>> >found that it doesn't seem to work quite right. >>> >I remember some discussion about AC stuff on here a >>> >few months ago and perhaps someone may have some >>> >answers for me. >>> >Here is what's happening. >>> >Turn the AC on and set the temperature to a low >>> >setting. The AC clutch will cycle on for about 2 >>> >seconds, then cycle off for about 5 seconds, then > >> on > >>> >for 2 seconds, then off for 5 seconds. It will do > >> this > >>> >over and over...The low pressure line will get > >> *cool* > >>> >but not COLD. I put a pressure gauge on the low >>> >pressure side and when the compressor cycles on, it >>> >reads about 125psi, when the compressor cycles off, >>> >the pressure reads about 130psi. There's > >> refridgerant > >>> >(r134a) in the system (I couldn't find the watch > >> glass > >>> >to verify, but the pressure's good). I pulled the >>> >relay to check if there's a bad contact, but that's >>> >good too... >>> >So, here's my question. The normal function for a >>> >compressor in a '96 Jeep running r134a coolant. > >> Should > >>> >it cycle on and off like that? And if so, why am I > >> not > >>> >getting any COLD air? It get's cooler than a 150 >>> >degree car interior, but not COLD. >>> >I remember on the older Jeeps (XJs, I have a 90 and > >> 89 > >>> >xj) there was a relay fix that kept the compressor > >> on > >>> >continuously...I performed this mod on both Jeeps > >> and > >>> >they run colder with this mod. Is there something >>> >similar I need to do with this one too? >>> > >>> >Thanks for the info (in advance) >>> > >>> >Ed >>> >web/gadget guru >>> > >>> >"I'm not an expert, but I *did* stay at a Holiday > >> Inn Express once..." > >>> > --Holiday Inn Commercial >>> >Tired of spam? Yahoo! Mail has the best spam > >> protection around > >>> >http://mail.yahoo.com > >> "I'm not an expert, but I *did* stay at a Holiday Inn Express once..." --Holiday Inn Commercial Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------ Date: Wed, 8 Jun 2005 10:30:30 -0700 From: "Jim Blair" Subject: Re: xj: The Big XJ Chill Just thought I'd mention there is a new synthetic additive for R134A systems to boost the cooling by about 20% (makes them more like R12) ------------------------------ Date: Wed, 08 Jun 2005 17:32:26 -0400 From: Marc Subject: Re: xj: function of an AC clutch Thanks Ed. I'll try it. It looks easy enough. Marc. Ed Kummel wrote: >>here you go Marc, >>I performed this fix on both my 89 Wagoneer LTD and my >>90 Cherokee Sport. It makes a big difference: >>http://jeepsunlimited.com/xj/ACrewire/rewire.htm >>Ed >>web/gadget guru ------------------------------ Date: Wed, 8 Jun 2005 17:12:45 -0600 From: =?iso-8859-1?Q?Ing._William_Mar=ECn_Moreno?= Subject: RE: xj: function of an AC clutch Try it friend, I did it and works great!! William XJ 88 Wagoneer LTD - -----Mensaje original----- De: owner-xj-at-digest.net [mailto:owner-xj-at-digest.net] En nombre de Marc Enviado el: Miircoles, 08 de Junio de 2005 03:32 p.m. Para: xj-at-digest.net Asunto: Re: xj: function of an AC clutch Thanks Ed. I'll try it. It looks easy enough. Marc. Ed Kummel wrote: >>here you go Marc, >>I performed this fix on both my 89 Wagoneer LTD and my 90 Cherokee >>Sport. It makes a big difference: >>http://jeepsunlimited.com/xj/ACrewire/rewire.htm >>Ed >>web/gadget guru ------------------------------ Date: Wed, 8 Jun 2005 21:52:03 EDT From: HSurfer21-at-aol.com Subject: xj: XJ cooling when ever i turn on my air (be it heat or cold) something makes a loud squealing sound and i was wondering if any one had any trouble shooting ideas ------------------------------ Date: Wed, 8 Jun 2005 20:49:41 -0700 (PDT) From: Ed Kummel Subject: Re: xj: XJ cooling it sounds like a fanbelt squeal. Pop the hood and look at the compressor. With the AC off, the center of the pulley for the AC compressor will be stationary. Turn the AC on and you should see the center of the AC compressor pulley spinning. If not, then your compressor is shot. If it is, but only intermittantly, then it could be a loose belt, or a bad compressor. If you have an r134a system, try putting in a shot of coolant with oil in the system and see if that allows the pulley to spin. If not, then seek professional help. Ed web/gadget guru - --- HSurfer21-at-aol.com wrote: >> when ever i turn on my air (be it heat or cold) >> something makes a loud >> squealing sound and i was wondering if any one had >> any trouble shooting ideas >> "I'm not an expert, but I *did* stay at a Holiday Inn Express once..." --Holiday Inn Commercial __________________________________ Discover Yahoo! Get on-the-go sports scores, stock quotes, news and more. Check it out! http://discover.yahoo.com/mobile.html ------------------------------ Date: Thu, 09 Jun 2005 07:04:14 -0400 From: Colucci B Subject: xj: The Big XJ Chill #2 Greetings Marc! Replacing the clutch is supposed to be straight forward. Have I done it myself, NO. With the age of the truck, and the price of the R-12 it was worth it to me to pay the dealer to do it. Here is the process as I understand it, and you will see why it was worth paying to have it done. You have to remove the serpentine belt, then isolate, and remove the compressor. This can be done in a jeep thanks to the fill valves, but you may still loose a quantity of that precious R-12. So many techs with experience opt to unbolt the compressor bracket and tilt the compressor up for more access. This can be dangerous, since you are putting undo stress & strain on the A/C lines. I would not have a problem doing this with a new set of lines, but I am leery of trying it with 17 year old lines. One crack and all of that precious r-12 is gone, and you could seriously injure yourself from the discharge. Then there is the problem of your clutch attachment method. Some have a large center bolt that can be removed, and the clutch assembly slides off of the shaft. Others have a pin that must be removed, or several bolts that must be removed, and then the clutch unit has to be pulled with a wheel puller. Once again this means a lot of bouncing, and pulling stress on the refrigerant lines. If the dealer breaks one they buy, if you break one you cry. Until the next dimension, Admiral "Coluch." Starfleet Headquarters Ohio Post End Transmission................ ------------------------------ Date: Thu, 9 Jun 2005 08:00:48 -0400 From: "Don Hansen" Subject: xj: Re: XJ cooling Belt slipping due to increased load. - ----- Original Message ----- From: To: Sent: Wednesday, June 08, 2005 9:52 PM Subject: xj: XJ cooling >> when ever i turn on my air (be it heat or cold) something makes a loud >> squealing sound and i was wondering if any one had any trouble shooting >> ideas ------------------------------ Date: Thu, 09 Jun 2005 09:31:51 -0500 From: "Allen Zylstra" Subject: Re: xj: 96 ZJ oil pressure Thanks, I will check under switches and see. The picture of the low oil sensor did not look like a sending unit since it had no wiring on it. Allen >>From: "Jim Blair" >>Reply-To: xj-at-digest.net >>To: >>Subject: Re: xj: 96 ZJ oil pressure >>Date: Mon, 6 Jun 2005 20:23:09 -0700 >> >>A: The problem is they give it a stupid name. It's under switches and not >>sensors. >> >> >>From: "Allen Zylstra" >>Subject: Re: xj: 96 ZJ oil pressure. >> >>I went on napa's website, but I only find a listing for a low oil >>sensor. Is this the correct part? It doesn't say anything about oil >>pressure. >> >>I think I should just replace it with a manual guage that I know works. >> >>Thanks again, Allen. ------------------------------ Date: Thu, 09 Jun 2005 11:25:59 -0400 From: scrambler1987-at-aol.com Subject: xj: '97 XJ dash/instrument cluster needed I am looking for a dash/instrument cluster for a '97 XJ. Anyone have one? Thank you ------------------------------ End of xj-digest V1 #2111 *************************