47-55.1 Lincoln Cooling Fan

[dsraven]

You can also run it with no stat and see what flow you have through the rad, then pull the upper hose and do the flow test into a bucket. Like said above. When done and sorted pull the block drains to dump as much water out as possible.

[mobileortho]

So I think I figured it out. Took out the stat and used a bypass on the heater hoses as suggested. Got good flow through the water pump, temp held steady around 185ish. Looks like there's a bad valve in the heater that's restricting flow. I'll put the stat back in & leave the bypass hooked up untill i get around to fixing the heater. Dont need it now anyway! I appreciate all the advise! This LS definitely has a learning curve!