OK i am reading this out of my dads diesel repair manual.
"There are many similarities between diesel and gasoline engines but it's the diffrences involved in ingnition of fuel that makes servicing and repairing a Diesel engine unigue.The diesel engines covered by this manual operat on the same four-stroke prinicple(intake,compression,power, and exhaust)as most gasoline engines.But,instead of igniting the fuel and air in the cylinder duringf the third stroke by introducing a spark from a spark plug as on gasoline engine,the diesel engines uses compression ignition.Compresssion ignition occurs when extremely high compression ratio of a diesel engine(18:1 to 24:1 as oppossed to gasoline engine ratios of 5:1 to 14:1) compresses the air in the cylinder untill its hot enough(around 1000-degrees F)to ingnite when fuel is injected.
My dads truck is a diesel and is turbo charged
It is a dodge 3500 cummins turbo diesel 24 valve
sorry for the long post