I ended up having to take everything back off and space the tensioner. Put everything back on again. Went to put the supercharger belt on and the ls3 water pump pulley was to narrow. Never even thought about the water pump. So I had to take the supercharger, all brackets, intercooler intake pipe, water pump, coolant hoses back off and drain the coolant. Good news, I went with a ls6 water pump and thermostat. Couldn't find a thermostat housing so hopefully my ls3 housing works. I ended up welding the pulley to the water pump. That way it don't back off.




Tested to see what material its made of. It's definitely carbon steel.






Done! Took literally 2 minutes.



I used 316L stainless steel wire and once it cooled down I painted the bare area to prevent rusting.