2016 4500 6.7 Overheating
#1
2016 4500 6.7 Overheating
Truck went back to the dealer for a TSB, they replaced the water pump. Truck was still overheating. Replaced fan clutch (2x now), Temp sensor, thermostat (once after market, once direct from dealer), and flushed (with running water) the radiator, engine, heater core hoses to the cab. After all that, the truck is still constantly, yet randomly overheating. It will work normal for a few hours and than start to creep up to 230. Let it sit, might instantly overheat again (removed cap, let air out to cool, check fluid level each time). Sometimes spiking as high as 260. The fan never seems to sound "like a jet engine" as I've heard on these forums, but I can't stop or slow the fan with a newspaper either, so it seems to be spinning with resistance. At this point, I'm not sure what the problem is, or could be. Is there any other common causes or diagnostics methods? anything obvious i missed?
#2
Registered User
Where did you get the fan clutches?...What brand?...Here is a recent thread concerning overheating on older trucks which will still apply to later models...Welcome to DTR......Ben
#4
Administrator
Unless some of the new parts are bad, it seems that the radiator may be plugged. A garden hose will not clear out a clogged radiator, they have to have something much stronger. Does the rig heat up real fast or is it kind of a slow process of it inching up? My experience has been that when radiators start to lose capacity because it is clogging by degrees, the temp slowly rises. This, as opposed to a failure of the water pump or no coolant, will heat up real fast. Has it ever been run with just water in it? (I doubt this)...Mark
#5
Definitely never run it with straight water, we've gone through gallons on gallons of the pink mopar stuff at this point. It is most definitly a slow creep in temp, usually. Once it hits that 215 point though, it can quickly his 230. But generally we'll be there 190....5 mins later...194....next ed light creeps up to 200...than next light, might go like 200-220
#6
Administrator
Definitely never run it with straight water, we've gone through gallons on gallons of the pink mopar stuff at this point. It is most definitly a slow creep in temp, usually. Once it hits that 215 point though, it can quickly his 230. But generally we'll be there 190....5 mins later...194....next ed light creeps up to 200...than next light, might go like 200-220
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