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A/C Compressor Pulley Seized

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14K views 10 replies 7 participants last post by  Dan_IN_MN  
#1 ·
Hey guys, I just tried to start my car after it was sitting in my garage for a little over a month. The belt was squealing/smoking and eventually the engine died. I removed the belt and noticed that the A/C compressor pulley isn't moving. I tried forcing it by hand after spraying some WD-40 on it but it's stuck pretty good. Hard to get some leverage on it as it's in a tight spot.

What should I do to break it loose?

Thanks.
 
#2 ·
Sadly it's probably your compressor along with the pulley idler bearing that has seized. If it was just the idler bearing, the compressor would always run.

Did your AC work when it was parked?

When we got our '99, the AC compressor was seized. If you turned the AC on, the belt would squeal just like you described.
 
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#9 ·
Yes, it worked before I parked the car.

What I'm trying to say is that with the belt off, I can't even turn the pulley by hand. It's like rust jammed it up or something.

Just trying to figure out how to crack it loose without doing any damage or removing it...
Bummer! Like I posted, it was just the compressor that was stuck. The idler bearing was still good. When the AC was turned on, the belt sounded just like yours I'm sure.

Yes, if you replace the compressor, the system will have to be flushed and a new receiver dryer installed.

I got our compressor for $50.00 from a bone yard. Receiver dryer from the internet. Your system should be evacuated to remove the refrigerant. Lots of YouTube vids on DIY for this.
 
#3 ·
Yes, it worked before I parked the car. What I'm trying to say is that with the belt off, I can't even turn the pulley by hand. It's like rust jammed it up or something. Just trying to figure out how to crack it loose without doing any damage or removing it...
 
#5 ·
Your compressor shit the bed. There's nothing you can do to get it moving again, aside from replacing the compressor.

I would try to find a shorter belt that only goes around the alternator and crank pulleys. Adjust the alternator tensioner about halfway, and tie a string around the pulleys snugly. Take the string to a parts store and see if a a belt is available that is the same length and correct width for the pulleys.

There may also be an A/C bypass pulley available.
 
#7 ·
Keep in mind if you replace the compressor, you'll need to flush the system or else the new one will probably kick the bucket from all the metal floating around in the system.

It's possible that just the clutch froze up too...
 
#10 ·
Keep in mind if you replace the compressor, you'll need to flush the system or else the new one will probably kick the bucket from all the metal floating around in the system.
Probably the filter/dryer captured most junk. It's impossible to flush the system unless completely dismantled. No amount of flush will get crap past the TXV valve and the condenser has so many small passages it will not easily pass junk either.
 
#8 ·
My friend's 97 V6 LE did the same thing. Compressor froze. Prior to that it just sounded super loud.
 
#11 ·
If you're going to replace the compressor, do some research on how to do it and how much oil the system needs. Yes, oil runs in the system. Probably the reason why the compressor failed is it lost oil over time, the system may have been recharged but didn't have enough oil.