Picking the right A/C Compressor

April 04, 2025, 11:20:41 am

Looks like my dash A/C compressor has started slinging oil so I'm on the hunt for a replacement. Looking at a few threads on here, they call out a Seltec TM-16HD compressor for my 2003 U320.

I found this thread Source for dash air compressor? where Jim said he has a Seltec TM-16HD model 488-46018 in his 2003 U320.

I found this thread Question about replacing dash a/c expansion valve where T and M Long said they also have a TM-16HD in their 2004 U270.

Looking online, I found AutoAir Online that does have these compressors, but I see both TM-16HD's and TM-16HS's. The number on my compressor now is 435-56018, which comes back to a TM-16HS with matching number 56018: Genuine Seltec TM-16HS Compressor - Auto Air Online I can see that this compressor uses the 3/4" discharge and 7/8" suction threads, like mine appears to have. Also, mine has the bolted on rear fittings, like this one.

I found this compressor in the HD line that has the same line sizes, but the fittings are integrated and it's only got a 1 rib pulley. Genuine Seltec TM-16HD Compressor - Auto Air Online

Then I also found this compressor in the HD line that has the same line sizes, bolt on fittings of the same size, 2 rib pulley and a different clutch style. Genuine Seltec TM-16HD Compressor - Auto Air Online

Does anyone know the differences between the HD and HS compressors?

Re: Picking the right A/C Compressor

Reply #1 – April 04, 2025, 12:07:24 pm

HD: filled with ZXL100PG oil and Valeo green label
XD: without oil and with Valeo green label
HS: filled with ZXL100PG oil and Seltec orange label
XS: without oil and with Seltec orange label

Re: Picking the right A/C Compressor

Reply #2 – April 04, 2025, 10:20:22 pm

Just for reference here's a Seltec Guide

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