Perhaps Pete, but my engine
(2003T - same type, but 3 cyl, and turbo) has almost 10,000 hours and has never had that issue. I have seen some that have blocked the drains, but I believe that was because of a salt
build up due to weeping water seals
- the build up was all around the pump body by the drains, blocking them underneath as well as the top/sides. Like all engineering good maintenance
is the key to a long life.
Easy for the OP to check if the drain galleries are clear. If they are, the water did not come from the water pump...