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I did have two "longer" 10mm bolts, but I think one of the goes on the engine carrier... So only left with one bolt, which I believe went into the left upper side of the water pump perfectly.
I just had mine replaced last thursday on my 996 C4 (-99) after 70700km. Broke down on the highway, made a lot of noice....
Bearing completely broken, turbine wheels on waterpump damaged and fallen into cooling system.
Tow truck to the closest dealer and they fixed it directly (had a pump on stock, and squeeze me in between other cars, Great service!), after a few hours I was on my way again with a new water pump.
How long does water pump replacement take? I will be attempting this DIY over the weekend.
On the way home from the my dealer (approx. 2.5 hours one direction) I had the bearing / seal go out. Initially squealing followed by clunking, and finally water loss. At least I was about a mile from the house.....
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