Would the wrong oil cause the water pump to go. on 1999 Volkswagen Passat

I had an oil change about 2 weeks ago. They used 20-50 oil when they replaced it. I had no warning other than a rattling sound up by the fan. The next day after driving about 25 mi the car started smoking. The mechanic said they think it is the water pump.

Asked by for the 1999 Volkswagen Passat
The engine oil will not cause water pump failure.