I have a 2005 Durango with 5.7 Hemi has front and rear air need to change the compressor it has a 10S20E on it everything I find that says will fit says 10S17D what is the difference ? the mopar part number is P55056157AC that is on the tag on the compressor I don't want to order the wrong one. can anyone answer this thanks in advance.

 

I suspect the 10S20E is a slightly larger displacement compressor......

Here is one that advertises the correct part number... and it's CHEAP..... most of the OEM units I find are north of 300 bucks. I have no clue about quality on this unit........ nor do I know anything about the site it is on...... Too good to be true?

 

ok so I found the compressor for the Durango got it replaced changed a line that was a possible leak changed he drier and expansion valve flushed the system pulled vacuum on the system held vacuum at 29 for about a hour charged the system according to specs. on radiator support now the compressor won't cycle runs all the time unless you shut it off inside and the low side pressure is real high the high side is running bout 200-250 any ideas?

 

What is your low pressure side at, and what is ambient temp? Do you get cold air out the vents?

 

found the problem with the low side pressure the valve wasn't shutting all the way off its running around 35-40 now high side is running about 175 with outside temp about 75 degrees but the compressor still don't cycle and inside temp is about 45 degrees at center vent.

 

If the compressor runs constantly, that isn't really a problem. If pressures are good, and it's blowing cold air, then everything is working as it should.