New AC compressor clutch burning

I replaced my AC compressor clutch with a Toyota part. Installation was easy enough. I tested it afterward and it worked with no issues. The setting was on low and the recirculate button was off. Next day I turn it on and hit the recirculate button and it starts screaming an I smell a burning smell. Had to kill the engine to get it to stop. I was parked already. Cranking up again with AC off it squeaked for a split second then stopped squeaking. Next day I test it.

With the AC off, the AC and idler pulley are spinnning fine, the clutch I disengaged. Everything looks normal.

I turn AC on low with recirculate off, the compressor clutch engages and appears to work normal. I hit the recirculate button and it starts a deafening scream and smoking. Again I killed the engine and here I am wondering what went wrong.

 

I cranked it up again with the AC off and whatever is locked up continues to be locked up, screaming and smoking. So I killed it again. I removed the AC belt for now until I can figure it out. Seems something locked up and the belt was burning around the crankshaft but the compressor clutch and pulley were very hot to the touch. I was able to turn the clutch h with a wrench with very slight resistance.

 

Do you have the EWD for your truck?

My 2000 has all cable control for climate control .

It seems your compressor is locking up the only thing that would make the belt scream with the clutch engaged.

High or low pressure would disengage the clutch .

Only one wire the clutch grounds through the compressor .

Did you go overboard on the clutch install with something causing a ground problem?

When all else fails break out the manifold gauges!

Happy trouble shooting.

 

Has the clutch disengaged on this last adventure ??

 

Im not sure about EWD vs cable. Mine is a 2003. The only overboard thing I could imagine is maybe torquing the clutch bolt too tight, could that do it? Previously the compressor was working fine. Just the old clutch was squealing intermittently when on so that’s why I replaced it. Used an OEM replacement, new. What do you mean high or low will disengage it? I have manifold gauges and know how to use them but I didn’t mess with those lines during the install.

 

I cannot confirm at this time, but I was able to turn it with a wrench on the bolt easily

 

Things do leak lines get blocked!!

The high /Low pressure switch will close causing the clutch to disengage .

It sounds like you were having problems before now they just have got worse.

Do you still have the old clutch did you check the bearing was it about to explode?. A loose belt a intermittent seized bearing or a compressor failing will squeal the belt.

Most times a failed clutch will not engage .

Changing from fresh air to recirculate should not effect the AC Clutch your just no longer drawing in the hot outside air.

interesting one can only do so much remote.

 

Ok so I see what you’re saying. The compressor was likely already locking up intermittently with the old clutch and the clutch might not have been the problem? How would you go about diagnosing it? I could check the pressures but can’t check it while it’s running for the obvious reasons. The last AC I worked on was a ford which has an inline high/low expansion valve. Is it different on the tacomas? I can’t seem to find that part on the diagrams.

 

I think this thread may answer my questions https://www.tacomaworld.com/threads/1st-gen-a-c-system-replacement-how-to-seized-compressor.293204/

This is essentially the same thing I did with my ford 2 years ago.

 

Put oil in the compressor when you replaced it?

 

I didn’t replace the compressor, just the pulley and clutch. I didn’t open the AC lines.

 

on Toyota`s the high/low pressure switch is mounted on the EVAP core.

Making lots of grunt work to get to.

 

At least I shouldn’t have to remove the ENTIRE dashboard to get to it like I had to with my ford.

 

I think you answered your own question as to why the clutch failed. So here is the deal you have a system full of metal from a trashed compressor and it ain't going to be cheap.

 

Mmmhm, got the parts ordered already. I’ll knock it out this weekend or next. All the parts….

 

I many times forget to mention things I do in a routine manner .

Without thought I would determine just what in the compressor failed if the complete system is pretty much in need of being replaced .

Yes indeed this could get very expensive maybe you have been real lucky and the system is not comprised

My luck is never that good!

 

The entire system will have to be flushed (solvent) the expansion valve most likely is full of metal and need to be replaced really this is not a back yard project. Once it's clean it will have to be evacuated (vacuum pump) and recharged new oil will have to be added. Haven't done one in decades but it's never a pretty sight when a compressor fails.

 

I have a vacuum pump and manifold gauge set. I’ve done a full system replacement on my F150 almost two years ago in my carport, so I’m familiar with the process. I’ll have the old refrigerant reclaimed first then go to town on it. I ordered all the components including new lines, came out to about $450 after tax and shipping.

 

Well I replaced all the AC parts/hoses. But now it won’t hold a vacuum. The pump will pull it down to -30 but it will return to 0 after a few minutes when the pump is shut off. I made sure to replace all old o-rings and oil all the o-rings with the recommended oil. Added the right amount of oil to all the other components. The only thing I know to do is go ahead and charge it with some dye to find out where it may be leaking, it’s not immediately apparent. Unless anyone else has any ideas.

 

Well this may be no help.....but when I had a problem resealing an old fuel line fitting I ran into to these a/c problem solvers....

I got mine from auto zone......but heat/air mechanical supplies should have them....




they work so good on old double flares I keep an assortment of these....
#8's and #6's me thinks.....

Whats good on new stuff...is now dont have to tighten the shit out of it...