snw blue by you Posted February 1, 2010 Share Posted February 1, 2010 When towing a load up a grade. '08 550 LWB dump. Requires T-Stats, as EOT climbed to 265+ dgrsF I was able to verify the concern with the customer today while he was pulling his mini excavator. I will take pics tomorrow morning. Wait till you see what I found!!! Quote Link to comment Share on other sites More sharing options...
sam Posted October 6, 2010 Share Posted October 6, 2010 i have a truck doing the same thing, and fmcdealer is down, what have you found on this? was the tstats the problem with it? i found on mine that the engine temp gauge will go to hot and the ect will stay at 204 while the eot will goto 260+. when the eot will got below 259ish the gauge starts to drop. thanks for your help... Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted October 6, 2010 Share Posted October 6, 2010 Your checking this off of the laptop? Or have you gotten a true reading from the T-Stat housing? What is the fan clutch doing while this is happening? Fully engaged?????? Do you have a laser temp probe? Quote Link to comment Share on other sites More sharing options...
sam Posted October 6, 2010 Share Posted October 6, 2010 yeah i was checking off my lap top, the fan clutch is not engauged at all, and i dont have a laser temp probe... but i have noticed that the fan clucth will cycle on and off as normal. Quote Link to comment Share on other sites More sharing options...
LARRY BRUDZYNSKI Posted October 8, 2010 Share Posted October 8, 2010 but i have noticed that the fan clucth will cycle on and off as normal. So it is engaging and dis-engaging? At what temp? Is it intermittent? Quote Link to comment Share on other sites More sharing options...
gasgasman Posted October 9, 2010 Share Posted October 9, 2010 Casting sand in the oil cooler coolant pasage? Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted October 9, 2010 Share Posted October 9, 2010 One thing I see a lot is blocked off air flow through the cooling stack.... You HAVE to look at the radiator since everything else will look good. Overheating under a pull can have only so many causals.... Stephen... I recall you sayng something about a picture? Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted October 9, 2010 Share Posted October 9, 2010 Quote: One thing I see a lot is blocked off air flow through the cooling stack.... You HAVE to look at the radiator since everything else will look good. The engine blew up in this one, not sure why. <snickers> Quote Link to comment Share on other sites More sharing options...
sam Posted October 11, 2010 Share Posted October 11, 2010 it was the tstats.. hyperextended blocking flow, Quote Link to comment Share on other sites More sharing options...
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