GX has changed the fan postions a number of times on the cs2 and cs3 models, and that corresponds with cylinder design changes...Also with the cs3 some do not and never had the large fan at the back of the motor, this also is directly related to the cylinder fan positions.
If one was to remove cs2 or cs3 cylinder fans or if you are replacing them, be sure to pay attention to their position as far as air flow goes.
Also, the cs4 has 2 outer cylinder types...smooth or ribbed. I have not found any noticeable differences in cooling between the two types. The ribbed type seems to be mostly if not exclusively, on the older cs4 compressors.
If one was to remove cs2 or cs3 cylinder fans or if you are replacing them, be sure to pay attention to their position as far as air flow goes.
Also, the cs4 has 2 outer cylinder types...smooth or ribbed. I have not found any noticeable differences in cooling between the two types. The ribbed type seems to be mostly if not exclusively, on the older cs4 compressors.
