by geeves » Thu Feb 25, 2010 9:54 am
The isuzu engine is known for a high amount of crankcase fumes even if compression etc is within spec. Also the design of the breather doesnt readily stop oil getting blown into the intake. The catch can just catches the oil and redirects it back to the sump. It is not necessary on all engines but can help reduce fairly bad oil consumption. I have heard of one engine that was useing 2 liters per 1000 km before fitting and none after. It does nothing to restore compression if the engine is truely tired. I dont use one but I dont burn oil either.
Diesel engines dont have a fuel mixture as such
EGR is a different issue. EGR re-injects exhaust into the combustion chamber to reduce the flame temperature reducing nitrous oxide. It does reduce engine power slightly and the jury is out on whether it affects economy. I think your local rules will prevent you altering this system
Sanding your knuckles before starting work can help. That way you cant skin them