gengor Posted November 25, 2011 Share Posted November 25, 2011 I have a 2007 f250 with no heat concern. Some heat while idling but very little while driving. The engine does not seem to heat up at all.. It has a new t-stat. I also just pulled the water pump to see if the impeller was broken.. its ok.. I noticed some rubbing marks on the front cover and the pump.. but other than that nothing obvious. i think i also see a little bit of cavitation, but i dont have a new cover here to compare it to.. any advice would be appreciated. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 25, 2011 Share Posted November 25, 2011 What's the EOT/ECT pids read? Quote Link to comment Share on other sites More sharing options...
gengor Posted November 25, 2011 Author Share Posted November 25, 2011 It is -20C here... i have ect 55C and eot @75C at idle.. and ect@61C while eot@83C when driving. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 26, 2011 Share Posted November 26, 2011 If my calculations from the modern world to yankee are correct, then that's about a 40 degree spread and that is a bit high for the oil cooler efficiency. According to accuweather your area is running in the high 50's today and that truck should be running a bit hotter than 181 degrees down the road. Do you have a infrared temp gun to see what the radiator hoses/heater hoses are reading to correlate with the pid data? Couold be another bum thermostat, was it a Ford unit? Quote Link to comment Share on other sites More sharing options...
gengor Posted November 26, 2011 Author Share Posted November 26, 2011 I did not check the hoses with a temp gun, they do feel too cool to the touch.. it was a customer supplied aftermarket t-stat.. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted November 26, 2011 Share Posted November 26, 2011 Sounds like it could be headgaskets. Have you checked the cooling system pressure under load? Is the cap venting? Aren't you in my area, Greg? It's certainly not -20 here. Maybe +20 today. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted November 26, 2011 Share Posted November 26, 2011 Quote: it was a customer supplied aftermarket t-stat.. Pull it out, chuck it and put a Ford t-stat in it before going any further.........I'm just sayin' Quote Link to comment Share on other sites More sharing options...
Bruce Amacker Posted November 26, 2011 Share Posted November 26, 2011 Quote: it was a customer supplied aftermarket t-stat.. Pull it out, chuck it and put a Ford t-stat in it before going any further.........I'm just sayin' Ditto, that's your problem. Quote Link to comment Share on other sites More sharing options...
Jim Warman Posted November 26, 2011 Share Posted November 26, 2011 Check both your ECT and EOT PIDs to determine if the system is "overcooling". The purpose of the thermostat is, ostensibly, to maintain a minimum operating temperature. If the motor isn't achieving that minimum temperature, the thermostat is the first place to look. If you get a truck to work on from another tech who could not or did not resolve the concern... DO NOT pick up where he left off. Start from scratch... begin from the beginning. Question everything you are told. Believe half of what you see and none of what you hear. Having said all that, I find that we are adding "and reassess" to most all of our repair estimates. As the fleet of 6.0s and 6.4s ages, we are seeing concerns we never even imagined. Quote Link to comment Share on other sites More sharing options...
ETS Posted December 1, 2011 Share Posted December 1, 2011 Just did an 06 with no heat at idle, It was head gaskets. And cracked right head. I have not yet seen one with no heat running and a head gasket concern. Heater core plugged up? I have seen several with this problem but usually 1 hose is hot and one cool. Operating temp. is low though. Quote Link to comment Share on other sites More sharing options...
lmorris Posted December 1, 2011 Share Posted December 1, 2011 How low is operating temp? Even in our coldest weather, -40C, with a good thermostat they still reach 180F on the highway. Anything below that I would be replacing the thermostat. Quote Link to comment Share on other sites More sharing options...
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