Cooling system questions

[lincolnlocker]

Ok so I just replaced the reservoir cap, and the system seems to be pressurizing once it hits 180, but the temp is still going over 180. In park if I rev the truck up the temps will climb steady. I can go from 190-200 in about 30 seconds. Any clue on this one.

whats it doing under load? you need some fuel to cool the cylinders... just free reving builds heat.. and is unnecessary...

live life full throttle

 

[lincolnlocker]

Not sure if you seen this post. If you reading the coolant temp through the OBD2 port on a truck with an AUTO pcm it will not be accurate. You might be getting worried over nothing.

true, mine reads -40 all the time..

live life full throttle

 

[strok-n]

I don't know what to say, but if the coolant temp is not correct, than why is my oil temp within 5-10 degrees of that number. I really don't want to have to worry about my coolant and oil, so I hope I can get something figured out.