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SD1too · 27th May 2020, 09:03

Hi Larry,

I see that you have the diesel engine. When the air conditioning is activated the compressor places a significant load on the crankshaft pulley. As you probably know, this pulley (on the diesel) is susceptible to failure of the "rubber" parts. I strongly recommend that you turn your attention to this.

Regarding the "clean, clear oil" which you have noticed, if this had escaped from the compressor then:

It should contain luminous yellow/green dye.
The refrigerant gas would also have escaped giving you little or no cooling.
With little or no refrigerant gas, the compressor clutch would not engage and you would not hear the growling noise, if the compressor was responsible.

Since you have not said that your air conditioning is no longer cooling, I am not convinced that your compressor is at fault.

Simon

27th May 2020, 09:03	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,380 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hi Larry, I see that you have the diesel engine. When the air conditioning is activated the compressor places a significant load on the crankshaft pulley. As you probably know, this pulley (on the diesel) is susceptible to failure of the "rubber" parts. I strongly recommend that you turn your attention to this. Regarding the "clean, clear oil" which you have noticed, if this had escaped from the compressor then: It should contain luminous yellow/green dye. The refrigerant gas would also have escaped giving you little or no cooling. With little or no refrigerant gas, the compressor clutch would not engage and you would not hear the growling noise, if the compressor was responsible. Since you have not said that your air conditioning is no longer cooling, I am not convinced that your compressor is at fault. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.