Brand New Compressor aftermarket-
NOTE: on the rear of the compressor you will see two holes. On the "D" port (high side) the hole is restricted with a restricter. This means that in order for the fitting to seat all the way into the hole you will need to shave about an 1/8th of an inch off of the end of the pipe. Please do this and be sure that the metal plate on the fitting is flush with the head of the compressor so the o-ring will seal properly.
A/C Compressor SD-709 These AC compressors were used on Vanagons from 86-91. In 86 and 87, they were transitioning from the SD-508, to the SD-510, to the SD-709. So if you have one of those two years, this compressor will work, however, some adaptation may be required. Please check your compressor head (rear end) to be sure which version you have. SD-508 (Vanagons from 83.5-86) has compression nut fittings on the ends and looks like the picture below.
The SD-510 (86-87 only) and SD-709 (86-91) have a similar design in the end fitting, but the head itself is a different thickness which throws off how the fittings attach. Here is a picture of the two of them side by side for reference (see below)
You can see what I mean about the thickness of the "head" of the compressor. The other difference between the two is that the SD-709 is a 7 cylinder compressor while the SD-508 and 510 are 5 cylinder. The higher the cylinders the more efficient the compressor. That being said as long as you have a good functioning system, either should work well. You should try to order what you have for simplicity sake. If you have any questions please feel free to email us. This is a brand new compressor. However the manufacturer is subject to change according to what we can get at the moment. When replacing A/C compressor, flushing the system, and changing the receiver/dryer and expansion valve are required for warranty. Warranty is 24 months.