[Piwoslaw]

Originally Posted by TimV

When the engine is cold. Does it help to heat up the common fuel pressure rail with an 12V 500W silicone heater? So the diesel is hotter when injected? Or instead of the common rail, the metal fuel line from the rail to the injector?

Newer commonrails rely heavily on many parameters, including the temperature of the fuel about to be injected. Heating this in the wrong way may upset the combustion cycle (I've no evidence, just guessing). The fuel is already warmer after being compressed to a higher pressure.

Also, after each injection cycle excess fuel is routed back to the tank through a fuel radiator, so you'll be losing more heat there.

• Electromechanical grille blocks - one for the intercooler and one for the radiator.
• Upper grille blocked during winter.
• Intercooler walled off from the radiator, to keep the airstreams from mixing.
• 550W block heater.
• 125W heating pad under oil pan.
• Insulted oil pan (2 layers of 3mm foam)
• Reflective bubblewrap insulation under hood.
• OEM engine undertray - closed ventilation openings.
• 3x100W air heater in cabin ventilation to keep from using precious engine heat.
• EGR cooler (EGR/coolant heat exchanger - helps keep engine warm, but does not help warmup as EGR valve only opens once engine above certain temperature)

My turbodiesel has the above mods which help it warm up, but ecodriving still keeps the temperture down. Try driving it like it's stolen and your warmup time will be supershort

Some cars have coolant heaters with 1-4 12V glow plugs, shortens warm up not only by directly heating the coolant, but also by increasing load on the engine.


DIY version: