What I have learned so far about diesel engines is that a twenty year old engine is better by far than a brand new one.
This is due to the fact that the older engine is beefier and and has more meat (mass) than the newer engines. It can be rebuilt ie: cylinder liners replaced. The newer models don't have cylinder liners.
The newer engines run at a higher speed (rpm) than their older cousins. Here is a not so well kept secret; the slower any mechanical system moves, the longer that mechanical system will last.
Think of an old one lung (a single cylinder) diesel, it chugs away at around 800 rpm, compare it to today's engines which run well over a thousand rpm. I can't give an exact figure here as different brands have different speeds. The slower engine has less stress therefore less wear than the faster running engines.
This trend for 'disposable' diesels comes from the desire for lighter engines. The older diesel is heavy, very heavy due to its thick, cast iron chassis, necessary for the high compression pressures required, the slower diesel need a heavy flywheel to allow the engine to continue rotating through three unpowered strokes until it gets to its power stroke. The newer engines have a very small flywheel due to the higher speeds carry the engine through the unpowered strokes.
The most important factor in a diesel is the fuel. The fact that the fuel injector ports are so small the can be clogged by the smallest particle. Clean fuel is paramount.
The first line of defense is your primary filter. This filter should have a glass bowl so you can see if there is water in the fuel, this filter should take the water out of the fuel. The bowl should have a drain cock on it to bleed out the water as per the black and white drawing.
I just previewed this and I don't like where Blogger has put the image. Does anyone know how to get Blogger to put the images where you want them?
I will publish more as I learn more.....Allan