<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by quikduk:
We took a short trip this past weekend down to Palm Desert where the temp was around 112. After we left, the coach had to pull a long 4-6 percent grade. We had the generator running with both roof airs on and the temp moved around from 185-200.
When we had to climb the Cajon Pass to our home, the temp ran up and sat around (guessing) 119. I began to hear a garbled buzzing below the dash (temp alarm?) and made it to an off ramp a few miles up the pass where I let it idle for around 8-10 minutes.
When I got back in, (Mc Donalds break) it was sitting around 175-8. We took off and climbed the rest of the pass at about 50 mph. The temp stayed at 200.
This is the second time we have been out in this type of temp climbing grades that this has happened. I know this engine (275-C 8.3L, 800 '/#)has two thermostats and a rear mount radiator. Is it possible that there is an issue or is this normal and could I have done any damage? It seems to run fine. BTW, I did not smell coolant nor see it leaking anywhere during this time. I need to find out where that "buzzer" alarm is since it sounds like it either has a bad connection or needs to be replaced.
Any help is greatly appreciated. </div></BLOCKQUOTE>
I think you mean 219 and that is high but will not hurt engine. You need to make sure you are running engine at or above 2000 RPM in that type of pull and weather. Just manually upshift until you get the proper RPM's.