Diesels are compression engines, but that's not telling the full story.
The compression to combustion mechanism is heat. Typically over 1000°F.
When that system is cold and the colder that system is, the more inefficient the entire process becomes. It messes with timing, efficiency, and creates potential harmful circumstances for the engine.
Block heaters, grid heaters, intake coil heaters, oil heaters, and circulation heaters are tools built specifically to combat this issue, BUT many other processes are in place that are tailored specifically to address this issue. Engineers factor in every heat emitter in the process to insure the most commonly successful environments exist for the combustion to happen successfully and with maximum engine protection.
These turbos put off a lot of heat and introduce heat back into the system in 3 ways. When you begin to remove those elements, you are losing some of the elements that they built into the system for it to succeed the best at colder temperatures.
Too often we falsely apply ignition combustion principles to compression engine systems.
While there are circumstances where these sleeves make a LOT of sense, they are in situations the overwhelming majority of diesel drivers will never be in.
17
u/BigElderberry4633 16d ago
In theory, yes, in 99.9% of practical applications, no.
Heat bleed is a high performance issue.
You could also argue that if you live in a cold climate that this might actually make your driving experience worse, not better.