Water pump confusion

Hi, I drive a 1994 318is with an M42 engine and I need to replace the leaking water pump but my car is a little different than that described above:
1. Removing the plastic cover only reveals the radiator. The fan is surrounded by a second plastic "air tunnel" pictures 1 and 2 that is held in place onto the radiator with plastic pins on each side picture 3. How do I remove these pins? I suspect they are a one time use and need to be replaced as well?
2. The water pump belt is not held by a tensioner, it is directly held to the engine. Will removing the 3 bolts off the water pump pulley pictures 4 and 5 release the belt?
Thanks.



__________________
This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: BMW Radiator Replacement

[Wayne 962]

It looks pretty much the same to me, in the article I had already removed the fan and the housing around the fan (see the radiator removal article). The plastic rivets should be only used ones - simply pry them up with a screwdriver. The water pump belt is not "directly held to the engine" - one of the pulleys is indeed a tensioner - see the tensioner article for more clarity. As for the water pump, it is indeed held on with nuts/studs/bolts. Simply remove them and then you should be able to tap off the water pump with a rubber mallet.

- Wayne