I've never actually removed the flange to replace the pump. I've just unbolted the pump from the flange directly.

I was finally able to seperate the water pump from the fan clutch with the application of heat and PB blast and a good large set of vise grips. The hard part is holding the stinking pully stationary while doing all that.

A few well placed smacks with a hammer worked the pump free of the flange. Wan't JB weld. Just a fair bit of rust mating the pump with the flange.

On to tackle the thermostat housing.. wee..

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'84 300CD Turbo 132k (Anthracite Grey) - WVO - My daily driver - Recently named coo-coo-coupe by my daughter.
'84 300D Turbo 240k (Anthracite Grey) - Garage Queen
'83 300D Turbo 220k (Orient Red) - WVO - Wifes daily driver

I'm not a certified mechanic, but I did stay at a HolidayInn Express last night.