A.High sulphur content fuel
B.High lube oil temperatures
C.High vanadium content fuel
D.Excessive piston slap

A.having a shorter duration of opening
B.having a longer duration of opening
C.closing sooner
D.opening later

A.valve will open later
B.valves will close later
C.amount of fuel injected will be increased
D.amount of fuel injected will be decreased

A.a leaking fuel injection nozzle
B.a clogged air filter
C.early fuel injection
D.burned valves

A.on the power stroke
B.on the exhaust stroke
C.at the end of the power stroke
D.at the start of the intake stroke

A.early fuel injection timing
B.leaking valves
C.a continuously open scavenge air port
D.low cooling water temperature