| Howdy neighbor, did you buy your pump at Bob Ross? I think there are 2 different pumps based on the M104 engine serial #. I have an early # and the rear port for the oil cooler line. I have not seen the other pump, but I'd expect that it would not have the port for the line. I think the freeze plug may be for something else, but I'm not sure. The dealer where I bought my pump (bob ross) asked me if I needed the plug. Having already removed my old pump, I knew I did not need a plug. BTW, are you doing this replacement yourself? If you need any help, let me know... |