Finished the 166
Join Date: Feb 2008
Location: New Zealand
yes I admit thats a possiblity, though a very very slight one ! It takes an awful amount of work to actively kill the crankshaft pulley. From experience, it is more likely that the water pump pulley can be making excessive noise, as it may be slightly off-true when your water pupmp was lat replaced. Also, there are 2 idler pulleys (that don't do anything other than act as belt spacers) whose bearings can make a bit of noise.
My suggestion therefore is :
1) get a new poly V-belt, and have a look at the way the text is written on the belt for alignment data.
2) take the old belt off
3) while it is off, use a cleaner (like WD-40, or similar oil-lubricant-degummer) to thourougly clean the wheels and pulleys associated with the accessory belt.
4) thread the belt on - from experience, both to detension and release the belt will involve a long arm lever + allen key head. Plenty of more competent help from guys on here.
5) button up the car, and then do a test run to listen to the engine.
Hope this helps somewhat....