Well, looks like I got more work cut out for me this week... I got under there before reading the manual to grind the wrench down. I used a c wrench and one got a little stripped, but not too badly. Also found that the 3/8 fits much more tightly than the 10mm. I bought a spare 3/8 wrench and I will be grinding this guy down to make it fit. I feel that replacing this pump, although it may not fix my prob completely, can't hurt a thing(that is if all goes well). I have replaced the thermostat prior to this, and I did the hole drilling and all. After doing that... the car stays cooler for a good bit of time, but once out on the highway, it'll still reach the 100+ mark. I have an IR thermometer and it reads the 100C that the dash is reading so I know my gauges are reading correctly(woulda been nice if that were the only prob). There we go. More updates to come.

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1981 300CD 260k w 60k on new motor
1983 240D 4spd Manual