Okay, so my water pump started leaking the other day. I changed the pump using the OTC water pump holding tool. I fixed the water pump sprocket so it wouldn't cause any problems with the timing chain. As far as I know the sprocket did not have move in any way. After I got everything back together and filled the coolant, I noticed a very loud whine coming from the water pump/ timing chain area. I looked through older forum posts but could not find a definite answer but many similar situations after changing the water pump. I want to know if maybe I messed up somehow or is this a problem not related to the changing the water pump. If anybody could help me understand exactly why the tool is needed, and how it could possibly be misused I would really appreciate it. As well as any thoughts on what may have happened or what I could check.

I have a 2006 Cobalt LS with a 2.2L engine and automatic transmission.

 

where did you get the water pump from, some aftermarket pumps like from Autozone, or Oreilly's are junk. This is what happens when you use them.

 

Check torque on WP sprocket bolts