or "TOP" mark is upward. Ensure rings turn freely in ring grooves.
Piston ring size may be identified using mark on rings.
PISTON RING IDENTIFICATION TABLE
Application Mark
Standard
1st Compression Ring ........................................ None
2nd Compression Ring ........................................ None
Oil Control Ring ............................................. Red
0.5 mm Oversize
1st Compression Ring .......................................... 50
2nd Compression Ring .......................................... 50
Oil Control Ring ............................................ Blue
1.0 mm Oversize
1st Compression Ring ......................................... 100
2nd Compression Ring ......................................... 100
Oil Control Ring .......................................... Yellow
Fig. 9: Piston Ring Gap Spacing
Courtesy of Isuzu Motor Co.
NOTE: Lower side rail and second compression ring share same gap
position on piston.
PISTON PIN REPLACEMENT
Removal
Use an arbor press and Piston Pin Remover (J-24086) to press
piston pin out of piston and connecting rod assembly.
Inspection
1) Check connecting rod for distortion and parallelism. If
distortion exceeds .008" (.20 mm) or parallelism exceeds .006" (.15
mm) per 3.94" (100 mm) of length, replace connecting rod. Standard
