Join Date: Nov 2009
Location: I was born in Germany, raised in Texas.
Yup. An air lock keeps fuel from moving too. No fuel, no diesel explosion under the hood. :) We've started my son's old mercedes numerous times simply by opening the gas cap. There's supposed to be a vent to prevent the air lock but on these oldies, they get clogged. You can tell when it's a fuel issue because usually they crank just a little bit faster (as long as the battery and starter are good) and they never hiccup just a little right before they fire up. Does that make sense? If there was fuel, it will start to sputter or hiccup (these are very technical terms y'all should know) because it's trying. Without fuel, the crank sound doesn't change. Same if the glow plugs aren't working. Diesels need their heating blankets. ;) If that fuel doesn't get heated up for that split second, you can crank for hours (which of course the batteries won't allow).