hi all,
did a search and can't seem to find what I need.
The engine in question is from a 83 sd (617)that i transplanted into my IHC Travelll a few years back. Whats happening is even after the truck is ice cold,the upper radiator hose is hard. The coolant overflow tank is empty utill I release cap which has alot of presure and then some coolant will fill back up into the reservoir. I have a new cap on it which is a 120. I could not find a 100. Also note that the reservoir might be mounted a little higher in the engine bay as compared to how it is in the sd and i also have a vegoil system in place so the coolant amount is alot because of the hoses going to the rear. The truck does not run hot and gives good heat. I do have to add coolant quite often but i believe that is a heater core leak. Anyone have any ideas why there is always so much pressure in the system? Thanks Mike