Pulling my hair out

On 7/17/2022 at 8:53 AM, fjh said:

Yup do the simple stuff first rad cap also!

New radiator cap also

On 7/16/2022 at 8:30 PM, Joey Mack said:

since its an RD, i bet it works in the dirt, and there is a mess between the CAC and the radiator, as well as a clogged radiator, that may need to be boiled.  or just buy a new radiator..  did you change the water pump housing because it was cavitated?  was the coolant mostly water? when you pulled the thermostat was it hard to get apart and broke when it was apart?  I bet you have a viscous fan clutch,,, is it weak?  here's a crazy 'Q' has some done a valve adjustment right before it ran hot?   it's an E-Tech, so there isnt a whole lot of outside issues that can raise engine temp..  Pretty basic engine..  jojo

Truck had no thermostat when purchased and under heavy load on steep grade out of quarry never went over °160, so we put a thermostat in with waterpump, a housing, air compressor...never overheated. There is a new cam kit in the truck by previous owner 

On 7/16/2022 at 9:23 PM, h67st said:

I'm with Joey...make sure both the air side and inside of the radiator are clean. He's got some good ideas about the water pump, tstat, etc.

We changed waterpump and housing behind the pump and still is bubbling 

On 7/16/2022 at 8:17 PM, D-Day said:

how long has the radiator been in there they do get choked up with deposits over time

Radiator is aluminum and looks brand new and very clean between Radiator and ac core

On 6/1/2020 at 10:19 PM, Isac said:

I’ll go ahead and change the air compressor then and see what happens

 

7 minutes ago, Pulling my hair out said:

Before I did anything I put exhaust and compression gas detctor on the  Reservoir and showed nothing so I changed my air compressor installed a new waterpump, the housing behind the pump, thermostat, various hoses, flushed all places I could get a hose into. I Still have the problem. 

On 6/1/2020 at 10:19 PM, Isac said:

I’ll go ahead and change the air compressor then and see what happens

 

I have a 2000 RD688 with a 427, before I did anything I put exhaust and compression gas detctor on the  Reservoir and showed nothing so I changed my air compressor installed a new waterpump, the housing behind the pump, thermostat, various hoses, flushed all places I could get a hose into. I Still have the problem.