Isuzu L Series Manual page 40

VI. Component Failure Analysis
Piston
Description:
Piston Failure due to reusing a previously
cracked piston skirt.
Description:
Broken piston skirt tang due to excessive
piston to wall clearance. (Creates piston
slap sound).
Description:
Seized piston skirt due to insufficient
piston to wall clearance. (a.k.a. piston
galling).
Description:
Failed piston due to lack of oil in the
engine at the time of failure.
(Heat failure can be identified by "4 point"
scoring resulting in vertical scoring on the
sides of the pin boss on both sides of the
piston.)
U
L-Series Diesel 39