So I own a 2015 4037 Ventana, and I checked the level of my coolant and to me it looks low. So I tried just to remove the fill (Radiator us old timers
) cap, but was unsuccessful, the cap would rotate to first release, but no farther, I did not want to take a wrench to it, worried I might break something I shouldn't.
My two questions are, 1. is there a secret to removing the cap and 2. if I need to add coolant, ( I have told we need a specific type) what do I add. Ventana is running the I6 on a freightliner chassis.
Thanks in advance,