AC Clunk (1 Viewer)

[CurtB]

So, after changing water pump, belts, and hoses, I'm out for a test drive and decide to turn on the AC just to check it out. Everything works fine for while, but I notice that the compressor starts making a louder and louder clunk when it engages. AC still works fine. I zap the AC clutch with some lubricant and the noise goes away for a while but has now started again. What is the likely diagnosis?

Curtis
'87 FJ 60

 

[Output Shaft]

Magnetetic clutch on compressor is showing it age.

 

[CurtB]

Magnetetic clutch on compressor is showing it age.

Kind of what I figured. It looks like there is a kind of a belt tensioner thing to the bottom of the pulley. I can't get it to swing and it wasn't in contact with the belt when I removed it. Is that just an "extra" part?

What kind of a job is replacing the clutch on this? Rock Auto shows a remanufactured Vista Pro clutch for $32....

 

[Output Shaft]

The little pulley below the AC belt is a belt tensioner and guide to prevent the belt from jumping the pulley when it gets looser with age. It's adjustable with a bolt on its pivot and definitely should be in place. The bearing is likely shot and should be replaced too.

Idler Pulley Question - '87 FJ60

6302-2RS Bearing 15x42x13 Sealed

 

[CurtB]

I have the new AC Clutch in hand. Anyone have tips before I dive in to replace?