97' Blazer 4.3 Ltr. 142k miles. Had the freon filled last year. Didn't seem to last very long maybe a years worth.I noticed there is a green, oily,residue on the pump. Would that be................. a leak in the pump? Thanks, just want to get other opinions.

 

Definitely sounds like a leaking pump to me. The dye used is typically bright green.

 

The best thing to do is buy a new compressor. ackits.com has the best deals I have found. The green is the dye that someone installed when charging it.

 

Thanks a lot for that info.! Now......how do I go about changing that compressor safely? As far as getting outwhats left in the system.

 

You should take it to an A/C repair shop or any place that services A/C systems and have them recover the system, vacuuming it out. When you replace the compressor, make sure that you pick up the required amount of PAG oil to put into the compressor. You may have to pour the oil out of the current compressor and measure it for the proper amount to put in the old compressor. You also might want to put a new filter/dryer on. That will require a specific amount of PAG oil be added as well.

 

Thanks for that info as well. One more question. Where would the filter/dryer be located? Thanks again.

 

The filter dryer is located on the passenger side of the engine bay and is about 4" in diameter and around 10" long. It is the big silver can right in front of the HVAC housing under the hood.

 

In regards to post #5, "vacuuming out the system" is that proceedure part of a "flushing of the system"that I haveheard some people refer to or is that a separate thing that needs to be done as well? Thanks again.

 

If the system will not run it is most likely empty since the low pressure cutoff is not allowing it to run. If it still works some it will definetly need to be flushed.

 

Very little cooling. Almost warm air.