mechanics freightliner, diesel, trucks

[formula]

With check light on and temperature goes lower check the cooling system for leaks. Soon you will find out yourself why!

[lzsvswu]

Thermostat might be stuck open, preventing the engine from fully warming up.

[christiansprojects-cgmanuf]

Well... First of all, maybe check why your check engine light is on.

[MrYosyp]

Thank you guys for replying I had oil cooler leaking oil to coolant we replaced it and cleaned the system and now temperatures are little better

[solomongebreyesus]

Which state are you in, I can help you if you are in Minnesota