Tried to remove the Water pump using the jacking screws, under light pressure the casting cracked around both jack screw holes.
To remove the Water pump I made up a jig which attached to the front of the Water Pump, to protect the front of the engine I used wooden blocks with a metal plate to stop the jack screws entering the wood.
The water pump came out without any problem, the initial force was quite high.
It looks like the rubber O ring had hardened up and stuck to the engine.
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