Luxury Coach Lifestyles - View Single Post - Detroit Diesel Overheating on Mountain Grades

prairieschooner · 01-26-2013, 11:00 PM

Thermostats aren't cheap, test them 1st before you just start changing parts. They are basic and should open by about 180 Degrees (newer Engines open at higher temps). Check them a few times but check them non the less, this will help troubleshoot the problem. Being a mechanic I want to know why I am replacing a part but....replace both if one is bad. If your replaced the Coolant doesn't have enough water this could also be a problem.
Climbing a grade I always gear down to stay within the power band.

PS just read Gringo's post and that is another potential issue. Water Boils at a higher temperature when under about 15 Lbs. of pressure. Good call Gringo!

Good Luck

01-26-2013, 11:00 PM	#7
prairieschooner Senior Member Join Date: Jun 2009 Location: Idyllwild, CA Posts: 1,340	Thermostats aren't cheap, test them 1st before you just start changing parts. They are basic and should open by about 180 Degrees (newer Engines open at higher temps). Check them a few times but check them non the less, this will help troubleshoot the problem. Being a mechanic I want to know why I am replacing a part but....replace both if one is bad. If your replaced the Coolant doesn't have enough water this could also be a problem. Climbing a grade I always gear down to stay within the power band. PS just read Gringo's post and that is another potential issue. Water Boils at a higher temperature when under about 15 Lbs. of pressure. Good call Gringo! Good Luck __________________ have Coach will Travel Steve & Tricia 1982 Newell 38' (built before #1) 6V92 DD, 5 Speed Allison, 12.5 KW Kohler, Couch used to make into a Bed but I fixed it! https://newellshowcase.com/thumbnails.php?album=214 2007 Yukon, 1981 CJ7 Laredo, 2002 Honda CRV, 1955 Thunderbird, 1952 Pontiac Sedan Delivery, 1952 Ford 8N, 1958 Airstream, 1959 Glasspar 16' Avalon, Cabin in the Woods........what will I work on next [SIGPIC][/SIGPIC]