Fan Clearance from Water Pump

[tjmckenzie]

The attached pictures show the top clearance of the fan to the water pump housing and the bottom of the fan clearance to the water pump housing. Should the clearance be even all around. I think it is rubbing on the housing. What is the cause of this? Water pump shaft or fan installation? Thanks in advance.

 

[chrs1961815]

Usually this is a problem with the new leakless water pump housings, but yours looks older. I would check your fan nut in this case and check the keyway if you can to make sure it is in good shape and the key is still there.

 

[Brentwood Bob]

Aluminum fan? Not accurate reproduction of an original.
Steel original would be dimensionally more correct imho.
Housing clearance is also affected by where impeller is placed.

 

[tjmckenzie]

Its an aluminum. Also just notice that it talks about filing the water pump housing? See attached. Should I be looking for a different fan?

 

[Mulletwagon]

Put a new pump and cast aluminum fan unit on and had to do quite a bit of filing on the pump snout to get clearance. Pretty common issue. Was told the casting was thicker than the original steel unit for the required strength. No problems for two years now.