So i'm about to begin my annual week-off to work on the house/Jeep in a couple of weeks - window frame repair and rear suspension change. And I had a funny thing happen to me a couple of weeks ago...
I replaced my heater core and evaporator last fall during my annual week of work (that sucked) and emptied and refilled the AC this spring. It worked awesome, super cold. And I knew my steering box was getting bad and my steering pump needed to be replaced and I was driving then all of a sudden i heard a loud bang and see something fly under my hood and i lost power steering, I thought something was wrong with my ps pump because it was getting real whiny. I get off the highway and i'm driving it back to my house when the engine starts to overheat bad. I pull over and see my pulley on the PS pump broke off and my S belt was just hanging there. I had it towed to my local mechanic (along with the parts I bough - PS pump/box) and had them replace those along with the pulley. It's amazing the difference replacing the box btw - wow.
Now my mechanic told me that my compressor was frozen and it put pressure on the belt, snapping the plastic pulley. he told me the compressor should be replaced. I was thinking of tackling this during my week off as it doesn't seem bad and i have AC tools.
Question, does his reasoning make sense? Any way to further analyze that? I trust him and they've helped me out plenty over the years but I'm finding out they aren't the best at diagnosis.
Any suggestions would be huge on how I can confirm or further diagnose. i don't' want that to happen again. I can say that perhaps I slightly overfilled the AC so perhaps that helped kill it - I have the gauges and it could have been 5-10 lbs more than recommended. I was going to drain it a bit but it was so cold.... I'm not sure if that would help with the diagnosis.
125k on my 01. My compressor pump was in the process of locking up. It was all wobbly when it was engaged and starting to fry the belt. Just replace it. They're kinda cheap though I realize you just did recharge it.
OK, i think i will then. I never knew they could do that to the belt. That sucked when it happened. I thought I broke something off the PS pump because it already needed to be replaced. That wasn't fun.
I'm driving the heep now, as long as i don't engage the AC, I'm OK right? It'll only freeze up again when in use? I want to make sure It's not going to mess up again, i have a long trip to go on Friday.
So if the pulley got frozen once, can that happen again if i'm not using the AC? Or is it only when the ac is on? I should add I've been driving it for about a week without the AC on and I haven't had a problem.
Not to beat up a dead horse, but just in case you wanted an answer about the composite pulley. In april of 2013 I put a 99 xj back on the road with a used engine. While going over something under the hood I noticed that my p/s pump pulley had a crack in the center near the metal hub. I thought I need to replace that, well after doing a lot of repairs to the jeep it had slipped my mind. In August of 2013 I had moved from Kentucky to Missouri (about 180 miles). On the way back to our house from town (22 miles on way) I heard a bang and a commotion under the hood, followed by battery light and a climbing temperature. I opened the hood to discover that the pulley exploded. I believe it would be good practice to watch for cracks on these plastic pulleys.