Basics all covered.. Checked with mechanical gauge--also used thermometer in filler neck--shows 230-240 degrees. Does not boil coolant and no excessive pressure in system.
Thermostat replaced--water pump--fan Ok--Radiator replaced--
Head removed and checked by very reputable shop, no cracks and resurfaced.
No oil in coolant and no coolant in oil.
Truck runs good and has lots of power, does alright untill you work it hard like loading a flat bed trailer.
Has a good strong airflow out of counter weight, but air is very hot, heats up counterweight to the point, you can't touch it.
This truck has been at the same place for several years and has not had any problems. Over heat condition came up recently.
Even though it runs good, could the injection timimig causing this?
Any Cat guys have any ideas, nothing that has been done has helped.