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Last edited by kbad; 11-04-2016 at 11:26 PM.
I just got a 2.0T and the Carfax report shows a water pump done at 50k and one at 80k, either from dealer or shop. Now at 110k the pump leaks from the impeller seal. A lot. I replaced it with a Rein unit (just the pump part, not the housing) because it was less than $40. Coolant was super rusty as was the block. So it probably failed some time ago and previous owner was dumping in tap water to top it off.
I did it the manifold-removal way, had no problem slipping it off the belt, which I did not replace and I left the drive gear as it was.
I hear people complain about "plastic" water pumps and wonder how common a failure of the plastic is compared to failure of the seal to the block or the seal to the impeller. The weak link in all water pumps is going to be the seals and gaskets. Just like intake manifolds, they may be problematic for a variety of reasons but using plastic instead of metal is not causing the problem. I've never seen VW plastic parts break and think, well if was made out of metal I'd not have this problem.
DSC_1056 by Timberto Lopez, on Flickr