Isuzu C240 - Piston

TCM sHoP MANUAL
PISTON
Piston Grade Selection and Cylinder Bore Measurement
Refer to the Section “CYLINDER BODY”, Items “Cylinder
Bore Measurement” and “Cylinder Liner Bore Measure-
ment” for details on piston grade selection and cylinder
or liner bore measurement.
Piston Ring and Piston Ring Groove Cl nce
Use a feeler gauge to measure the clearance between
the piston ring and the piston ring groove at several
points around the piston.
If the clearance between the piston ring and the piston
ring groove exceeds the specified limit, the piston ring
must be replaced,
‘Three
rings
type
Four
rings
type
Serene
Tice
Piston
Ring
and
Piston
Ring
Groove
Clearance
mm
(in)
Standard
Limit
0.09
-
0.11
1st Compression Ring ig o¢a5 — 0:0043)| 0.3
0.030 - 0.055 (0.012)
(0.0012 — 0.0021)
0.020 ~ 0.055 0.15
(0.0008 - 0.0021) | (0.0059)
2nd Compression Ring
Oil Ring
Four Rings Type
Piston Ring and Piston Ring
Groove Clearance mmiin)
Standard Limit
0.045 - 0.070 0.15
(0.0017 - 0.0027) | (0.0059)
0.045 - 0.070 0.15
(0.0017 - 0.0027) | (0.0059)
0.045 - 0.070 0.15
(0,0017 ~ 0.0027) | (0.0059)
1 Bh 0.020 - 0.055 0.15
Ring, (0.0008 - 0.0021)| (0.0059)
‘1st Compression Ring
2nd Compression Ring
3rd Compression Ring
-70-