Overheating when towing going uphill

[Huero350]

I replaced fan clutch and thermostat but truck still overheats when I’m towing up hill this is a 2002 f350 7.3
Need help any one has experienced this?

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[Clb]

Ford statt?
Real gauge??

Best guess...

Rad
Water pump
Block loaded with grease in cooling ports
Blockage
Timing



And at times normal...


That's all the spoonfeeding for today.
Hit the stickies and tech sections

 

[greenskeeper]

I replaced fan clutch and thermostat but truck still overheats when I’m towing up hill this is a 2002 f350 7.3
Need help any one has experienced this?

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What coolant temps are you seeing ?

 

[catbird7]

Could also be collapsed lower rad hose if the inner spring was removed. A real handy tool to help diagnose the problem is one of those infrared laser pointed thermometers. Work the engine climbing a hill then pull off the road and start checking for dramatic temp differences.