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Engine coolant reached 270 Degrees on obd link mx???
Just got my truck back (450) from rebuild on tranny. Hooked up my new obd link mx , and was out running the truck for a while. Started running it pretty hard to see what the gauges would do. Noticed the engine coolant was getting up pretty high, usually around 240-250, and then hit 270!!! My temp gauge on the truck wasnt budging , just stayed between hot and cold. Is this normal?? Seemed pretty hot to me but if i just took it easy on the throttle it would average around 230. If i stop and idle it quickly goes down to 206. Please look at oil temp and tranny temp also and let me know what you guys think.engine coolant temp is bottom middle.thanks
Ok which pid would give me the right engine temp? is it the engine oil temp? Is the trans temp. correct?
There is no PID for engine temp on automatic trans trucks because the PCM doesn't receive input from a sensor. Oil temp is usually pretty close....I think oil normally runs about 5-15 degrees higher than engine coolant depending on the work load. I haven't done much testing to know the actual delta though...
There is no PID for engine temp on automatic trans trucks because the PCM doesn't receive input from a sensor. Oil temp is usually pretty close....I think oil normally runs about 5-15 degrees higher than engine coolant depending on the work load. I haven't done much testing to know the actual delta though...
Trans temp is accurate.
Great thanks shake! I guess i would have to run a seperate gauge for engine temp . or trust the one on the dash, lol
Great thanks shake! I guess i would have to run a seperate gauge for engine temp . or trust the one on the dash, lol
The one on the dash is as accurate as it needs to be. When these trucks are towing, the coolant temp can steadily climb and then suddenly drop when the fan clutch locks up. If you install your own analog gauge then you will likely have some anxiety by watching how much the temp changes while working the truck heavy.
The factory dash gauge filters that stuff out for you and gives you the mean average info which is really what you need. Just pay attention to when your clutch fan locks up and see if your dash gauge remains in it's normal spot. If your fan clutch is locked up and your dash gauge begins to climb then you have a problem and need to back it down or pull over until the truck cools off.
The one on the dash is as accurate as it needs to be. When these trucks are towing, the coolant temp can steadily climb and then suddenly drop when the fan clutch locks up. If you install your own analog gauge then you will likely have some anxiety by watching how much the temp changes while working the truck heavy.
The factory dash gauge filters that stuff out for you and gives you the mean average info which is really what you need. Just pay attention to when your clutch fan locks up and see if your dash gauge remains in it's normal spot. If your fan clutch is locked up and your dash gauge begins to climb then you have a problem and need to back it down or pull over until the truck cools off.
That definitely gives me a piece of mind after seeing those numbers spike. will just keep an eye on dash then. So glad i can read trans. temp now though!
01-27-2016, 03:54 PM
