12-28-2017, 10:53 AM
That is the outlet for the engine pre-heater.
As long as the temperature is below freezing, I doubt that there is a time limit on running the heater but you should be able to feel the block getting warmer after 3-4 hours.
As long as the temperature is below freezing, I doubt that there is a time limit on running the heater but you should be able to feel the block getting warmer after 3-4 hours.