440 overheating

[snapshot]

Thanks, I think it might be pump, ruled out thermostat, can’t see coolant circulating, top radiator hose very warm, bottom cold.

 

[69hemibeep]

What sort of an 8-blade fan? I've found the pitch is more important than the blade count. I had an overheating 360 with a 7 blade fan, everything and I mean everything new, down to trying to improve the water pump ratio with a different pully. I thought that 7-blade fan meant it was good to go, but it turned out that it was actually from a /6, built to have high blade count but a lot less pitch. IIRC it was like changing from 1" to 3". No more overheating. It's worth looking into.

FWIW the 7-blade /6 fan is 2863 200, the 7-blade HP fan is 2863 215.

Just to add to Bobs post the 215 fan is used on Hemis and 18" the 216 fan is 18 1/2" is more common and repopped if you want a new one.