Re: 6V92 DD temperature question.
Reply #10 –
interesting variations in the cooling system controls.
My 97 has no electrical low-high. Straight mechanical variable speed fans.
I changed the 190 max temp fan speed controller to a 210 unit recently.
Stock Fan is always on at idle speed. Ramp up starts at 175 and max at 190 as far as the charts I have seen.
New unit same idle rpm but starts its fan speed ramp up at 195 and maxes at 210.
Thermostat does not fully open on my m11 until 195.
Truck cooling fan electrical switch on the m11 does not turn the trucks front fan on until 210.
Cooling fan on fully takes over 40 hp. Up to fifty at high rpms and makes the oil in the system hotter according to my cummins shop foreman.
Probably does not help the fan motors life expectancy running on high all the time.
Oh well testing this summer may show something. Long term better mpg and not much additional heating indications would seem to indicate I may be ok.
Had intermittent much higher mpg on the silverleaf show. Cooling system was finally at idle low speed for long enough to jump up the mpg IMO.
IMO Foretravel over did the cooling systems on points and added a pre cooling circuit just to try to keep the dash gauge from moving as much as possible.
Too many phone calls any other way.
As the posts here show every diesel owner is very concerned about any heating indications.
I had as I have said had countless conversations with rightly concerned owners about these issues.
Frankly I am not concerned if the gauge moves quite a bit under hard use and high temps and a grade.
I have passed numerous Rvs pulled over on grades in the last thirty years probably because the temp gauge moved off the peg.
mostly unnecessary. And somewhat unsafe IMO.
Had a guy with a new rear radiator multi slide sob run with me two years ago coming up from needles on I40 at 102 ambient outside.
Long uphill grade. I was floored. My dash gauge hit 215- 220 or so and stopped rising.
I noticed he finally dropped back in the next lane. Bet a dollar his temp gauge moved enougn he got uncomfortable.
Turns out my dash gauge is high versus the silverleaf. 10-15 degrees.
I never really went past 205 internally.
Tested my own coach after purchase up from the east into the Grand Canyon from the desert floor.
Dash got to 230 or so and stopped. Turns out it really was 215.
Now, long term 6v issues may well be different but I doubt it. Was not when I tested them new.
The extra controls were later discontinued on my m11 it seems.
Ah. I have no idea if the radiators are differently sized or the heat output from a 6v is lower or higher.
Needs a silverleaf verification and careful testing maybe.
My old testing was with company and/or manufacturers engineering reps in the coaches at times.
Do not do anything you do not feel comfortable with.
Perfect condition cooling system is necessary obviously.
Fun learning. Scary I know but the better safer driving was important to a lot of my owners.
The story I did not like to hear was a different not as pretty route selection based on the engine temp gauge.
Valleys instead of the ridges stuff.
Seen that too many times for me not to speak up a bit.
Topic: 6V92 DD temperature question.