sempka wrote:
rgatijnet1 wrote:
Were the radiator fins cleaned when the core was flushed?
Yes, they were washed out.
Based purely on experience, I would remove the radiator and have it professionally, thoroughly, cleaned.
Our first motor home was a 1977 Pace Arrow, Chrysler 440 engine. It would overheat going over the Continental Divide. I used radiator flush, washed out the fins as best I could, replaced the water pump, thermostat, fan clutch, belts, etc.
Finally, when it overheated on a mild grade, I went home and decided to remove the radiator for professional cleaning. When I unbolted the A/C condenser, and swung it out of the way to access the radiator, I discovered the fins looked like an adobe wall! The dust and bug guts had plugged it completely. There was no air flow through almost 3/4 of the radiator. Once it was professionally cleaned in a hot tank, no more overheating trouble.