[417GreaseMonkeys]

2001 f350 7.3l
Was driving down the hwy and lost heat.. about 10 minutes later it started getting hot so I pulled over (it never got to the red). Got it home, seen the water pump was leaking like crazy, along with oil leaking out the front gasket of the oil cooler, so i pulled it off there was definitely oil getting into my cooling system (guessing from the oil cooler leaking) so I replaced water pump, thermostat and oil cooler. And it still overheats after about 30 minutes or so of running. And still no heat! And it takes awhile to build pressure in the cooling system

 

[klhansen]

Did you do a complete flush (and I mean multiple times) to get the oil out of the system? How long since you did the water pump, thermostat and oil cooler work?

 

[417GreaseMonkeys]

Yeah I flushed it the best I could and I just got it all done. Yesterday. I would think if it had a blown head gasket or something I'd have some smoke out the exaust but I have none.

 

[Oneof6]

Work backwards, no heat is an indication of no hot media flow through the heater core, determine if that is real, not a dampering, hose or core obstruction. Easy to take the hoses off and run pressurized water through one side and see if it comes out at pressure on the other. Check your thermostat, stuck closed? Check WP performance by pulling a port plug, put a fitting and 3/8 hose into it and run the hose back to degas. No flow would mean WP impeller not turning or obstruction from or in radiator to pump. Might be time to get a coolant temp gage, graduated in deg F. The stock dash gage really is not very good for diagnostics.