98 Jeep Grand Cherokee Question

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PFunk26
07-08-2007, 10:23 PM
Here's the deal, my wife's Jeep is taking an all out crap lately as the catalytic converter need replacing(rattles like crazy) and today we were driving home from green bay and the ac died, then started to smell like it was burning. So tonight I messed with the fuses ( i figured it wasnt that but have limited car knowledge) started it up with the air on to a nice loud screeching noise took a spin around the block still no air, screeching stopped half way around and when I popped the hood there was smoke coming out by the AC compressor (I believe). So shut it off let sit for awhile then went back and cruised around the block without turning the air on, no smoke. Anyone have any ideas? Just thought i'd ask on here we cant get it to a shop til wednes and if i can avoid paying a shop even better.

Monkeydad
07-09-2007, 09:02 AM
I'd just get a junkyard AC motor and take it somewhere to get recharged afterwards. It's not worth getting a NEW part for it.

Do you have emissions inspections in your state? If not, lose the cat and have a muffler shop weld in a straight pipe. It'll sound nicer too. :)

If you do have emissions inspections, you'll just have to get a new cat. Just look for a generic OEM replacement if you want to save money on it.

firstdown
07-09-2007, 10:14 AM
It sounds as if the AC compressor has seized up. If you are good with tools its an easy repair. Around $250.00 for the compressor and evaporator and a recharging kit. If you take iit to a shop it will run around $800.00. The rattling around the catalytic converter is probably just one of the heat sheilds which a $25.00 tac weld can fix. They do tend to pop loose and it sounds like to peices of metal tinging together.

cpayne5
07-09-2007, 11:36 AM
Yeah, locked up AC compressor. Go for a reman, not a junkyard compressor. You'll get some sort of warranty with a reman. The price difference probably won't be all the much in the end, anyway.

Most muffler shops will not be willing to replace your cat w/ a straight pipe. It's a $25k fine for both the shop that does the work and for the owner of the vehicle. They usually don't touch stuff like that. I'm not familiar with GC's enough to know whether or not they have an after cat O2 sensor (probably not, but I'm not sure). If they do, then removal of the cat will introduce a whole new set of problems. If it were me, I'd get some wire and see if I could just tighten down the shield enough to stop the rattle.

TheMalcolmConnection
07-09-2007, 11:41 AM
Or if you don't plan on parking in any fields anytime soon, you could just take it off. :biggthump

mredskins
07-09-2007, 12:03 PM
Sounds like the serpentine belt may be rubbing or wearing out. It drives all the accesiores on the motor. Fairly easy to swap out. I know GC are know for having AC problems it is always the evaroparotor. THIS IS NOT EASY TO FIX. IT is located on the passenger fairly far up in the dashboard, requiring you to tear it a part. On my 97 GC same problem, so I just re charge it every month. It is really easy to recharge your system. I have had 3 GC all had big problems after 85k miles.

cpayne5
07-09-2007, 12:15 PM
The evaporator has nothing to do w/ the belt. With the symptoms described, it's almost a certainty that your compressor has seized, PFunk.

The a/c compressor has a clutch on it. When the a/c is turned on from the cab the clutch is engaged which transfers power from the spinning pulley to the internal parts of the compressor. The smoke comes from when the clutch is engaged. The clutch engages, but then the pulley is locked up to the compressor (seized, and not spinning), which makes the belt skid across it, creating smoke.

firstdown
07-09-2007, 01:26 PM
The evaporator has nothing to do w/ the belt. With the symptoms described, it's almost a certainty that your compressor has seized, PFunk.

The a/c compressor has a clutch on it. When the a/c is turned on from the cab the clutch is engaged which transfers power from the spinning pulley to the internal parts of the compressor. The smoke comes from when the clutch is engaged. The clutch engages, but then the pulley is locked up to the compressor (seized, and not spinning), which makes the belt skid across it, creating smoke.
What he sadi and if you decide to wait on getting the AC repaired I would get that belt replaced. It sounds as if you burnt the belt and if you do not replace and it breaks the car won't runn very long. Maybe 2 to 3 minutes before it will start to over heat as the water pump is driven by this belt.

mredskins
07-09-2007, 02:02 PM
The evaporator has nothing to do w/ the belt. With the symptoms described, it's almost a certainty that your compressor has seized, PFunk.

The a/c compressor has a clutch on it. When the a/c is turned on from the cab the clutch is engaged which transfers power from the spinning pulley to the internal parts of the compressor. The smoke comes from when the clutch is engaged. The clutch engages, but then the pulley is locked up to the compressor (seized, and not spinning), which makes the belt skid across it, creating smoke.

No really? I was just going through possible causes for his problem. I agrre it is most likely the belt. I have literally taken apart and put back that engine in my Engines 2 class. I am fairly well versed in it.

cpayne5
07-09-2007, 02:50 PM
No really? I was just going through possible causes for his problem. I agrre it is most likely the belt. I have literally taken apart and put back that engine in my Engines 2 class. I am fairly well versed in it.

The way your posts read, its as if you're claiming "it's just a bad belt". It's not.

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