Originally Posted by wowzer
When you guys get ready to pull out and head to your next stop, how many of you let your rig get to optimum temp before you head out?
I take it easy till it is up to temp.
Do over the road truck drivers un hook from their trailers to warm up first?
Some may suggest letting it idle. DO NOT DO THIS!!! Idling, especially on the newer models is just about the worst thing you can do! Idling doesn't create enough air flow in and out of the cylinders nor enough PSI from the injector to distribute the fuel in the cylinder. Ultimately the injector ends ups squirting it onto the side walls of the cylinder and not getting a very clean burn of the fuel pushing soot/unburnt fuel out the exhaust. With the new exhausts having all the new regulations this plays havoc on them. This will screw up sensors. plug the cat and particulate filters and and end up causing more harm than good.
Also, diesel is a very efficient fuel. meaning the majority of the energy is used for combustion. Thus not producing the high heat that gasoline does at an idle. This is why you see the bras on fronts of diesels during the winter time to help keep them warm as they use most of the heat to turn the motor and send the majority of whats left out the exhaust. This being said, Idling is fairly useless anyways as it wont produce much heat anyways...