wbmx1981

**I have searched and got back some results but nothing specific to my problem/question**

I have been without AC for a while now, I went with the advice of my mechanic and bought a whole new compressor, I actually bought the conpressor kit for $500+, but with the cost of labor (expansion valve) behind the dash, well now I'm saving for that.

I have also ready tons of forums about AC repairs. I got to the point to when I even replaced the clutch replay switch, and still nothing (that was just a shot in the dark, clutch does engage but... Read below.

The problem: My AC clutch engages and spins but will sometimes get "stuck" throwing off sparks while trying to spin.

The idea: I saw and read a lot of people who have actually replaced the bearing from the clutch pulley. The part is $17.99 from autozone. I know there is the clutch bolt, the shim, the snap ring, then the clutch is free. I also know some "other" tools are needed to release the bearing from the pulley.


The question: how difficult is this? Has anyone done it? Please anything will help. I honestly believe I can do this.

PLAN B: continue to save to replace the whole system, drier, compressor, expansion valve, evac/recharge, etc.

BiGEZ

iTrader: (24)

I did the pully and bearing change on my 94 SC300, very easy. Go to AutoAone and get/rent the pully holder. There is a 10mm bolt in the middle of the pully,using the holder remove the bolt. Then you will see a C clip remove it and the entire pully bearing assembly will come right out. Get the new pully bearing and revese the install process.
My pully/bearing was making a horrible noise once I turned the AC on. I changed out the pully/bearing assembly and it is all quite again. Took me about an hour to complete the job. My AC was still working though just niosy. Hopes this helps.

wbmx1981

Did you use snap ring pliers for the snap ring/c clamp or will another tool work?

BiGEZ

iTrader: (24)

I used a needle nose pliers to remove the C clip.

Sicarius12

Does anyone know what bearing this is? Not being from the USA we don't have autozone, but I have this exact problem. Had a quiet noise that I couldn't isolate until I had to go over a very harsh speed bump and it became louder. Managed to isolate it down to the AC pulley grinding.

Hoping to avoid paying $500 for a whole AC kit if it's just the bearing, would either need to buy a bearing online or if I knew exactly what bearing could go to auto shops here.

wbmx1981

Google "MT2024".

My problem ended up being the whole compressor, I bought a used compressor from a junkyard, but had new bearings put in it. It's quiet and cold.

Sicarius12

Awesome, thanks for that. I figure for $15 this is worth a try, and if all else fails I'll just spend the $500 on a new compressor and service kit.

wbmx1981

You'll need to remove the clutch from the compressor. First remove the 10mm face bolt, the snap ring (a pain in the *** without snap ring pliers), behind the clutch are two thin shims, DO NOT lose them, they allow enough gap space. Also, I was told by countless people I had to change all the other parts, condenser, expansion valve, drier, etc. I was so frustrated after such a long time with no air and me being in Texas HEAT I was desperate all I did was the compressor myself and no other parts. Like I said in my previous post, AC is blowing snowballs! Good luck!

Sicarius12

Any chance you still have the old bearing to get the actual bearing number from? The MT2024 is a santec part no and none of the bearing places here seem to stock the brand. Websites that stock it only seem to ship within the USA.

wbmx1981

That is the actually number on the bearing.

Sicarius12

On the OEM Denso bearing? Or the AutoZone one?

wbmx1981

My fault, the part no. is actually "2027" on both the Denso and at Autozone. Santech bearing is in the OEM Denso compressor.

Sicarius12

Thanks for that, comes up with heaps of hits in google. Hoping the bearing guy will have more luck with that number.

Youtube guide on how to do it.

Otherwise I'll have to take it apart and ride my motorbike for the week to get them to match it

wbmx1981

That's the video I followed too, but you might need a bearing press, if you bang it you might damage the bearing itself.

Sicarius12

For those that are interested, the OEM bearing is an NSK 35BD5222DUM18A, apparently interchangable with KOYO DAC355222.