Fan And Clutch Assembly Removal

[cthamp]

I am having to replace the water pump on my truck, however I am stuck right now. When I went to remove the fan and clutch assembly, I didn't have an open end wrench big enough. I went and bought a set of metric wrench decribes as "giant". The largest size was a 32mm, however still not big enough. Does anyone know what size the nut is that attaches the fan and clutch assembly to the water pump pulley?? I can't drive the truck right now so I am just having to guess when I go to the store to pick up more tools. I called local parts stores and two local chevy dealerships and no one could tell me. Any help would be greatly appreciated.

 

2003 Silverado, Z71, 4.8L

 

Thanks!

[markw8]

You should be able to go to Advance or Autozone and rent/use the tools for removel.

 

Mark

[rdnkcpa]

Hit the nut with an air hammer. It will pop it loose.

[govtech]

wht the above guy said works great,

 

the wrench size is 1- 7/16 ....set it up and hit it with a good hammer ....be VERY CAREFULL where the wrench will go ,if it doesnt go in a few shots (with the belt on of course) go to an air chisel as mentioned on the flat of the hex ...

 

wrench and hammer it back on after pump r & r