Cat Engine running hot

3406e caterpillar engine running hot around 220-230 we change thermostats, temp gauge sensor,low coolant sensor, flush radiator change air filters, radiator cap, blew radiator front and rear with air. Any information will gladly appreciated
 

tommyh

Well-Known Member
once I found my intake air ducts was loose and had come apart and was sucking hot air from the motor
I figure you have already checked that
 

Dauntless

Well-Known Member
Flushing the radiator doesn't cut it sometimes. If you've got an older truck it probably needs the radiator rodded out.
 
My C15 did the same. It was the Fan Clutch. The fan would sound like it was engaging. But once it got hot outside, the clutch started slipping enough that it wouldn’t cool properly. Try to spin the fan by hand. Of course with it off. It shouldn’t move.
 
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