SsangYong Musso. Manual — part 267

M162 ENGINE MECHANICAL 1B1-111

Group Code Letter and Cylinder Bore Size

Repair Size

1)

The group code letters are carved on the surface of the piston crown and in the mating surface of the crankcase.

CYLINDER BORE

Group Code Letter of Cylinder

A

X

B

X + 5

X + 10

Piston Type to be Used

A or X

A, X or B

X or B

X + 5

X + 10

Cylinder Bore Size (mm)

φ

89.900 -

φ

90.906

φ

89.906 -

φ

89.912

φ

89.912 -

φ

89.918

φ

89.950 -

φ

89.968

φ

90.000 -

φ

90.018

Type

Standard Size

φ

89.9

1st Repair Size

(Standard Size + 0.25)

2nd Repair Size

(Standard Size + 0.5)

Group Code Letter

1)

A

X

B

A

X

B

A

X

B

Cylinder Bore Size (mm)

φ

89.900 -

φ

90.906

φ

89.906 -

φ

89.912

φ

89.912 -

φ

89.918

φ

90.150 -

φ

90.156

φ

89.156 -

φ

90.162

φ

90.162 -

φ

90.168

φ

90.400 -

φ

90.406

φ

90.406 -

φ

90.412

φ

90.412 -

φ

90.418

1B1-112 M162 ENGINE MECHANICAL

Service Data Standard

Measurement of Cylinder Bore

1. Clean the cylinder wall.

2. Using a internal diameter gauge, measure the bore size in

axial and transverse direction at three points (1,2,3).

1,2,3. Measuring Points

A. Axial Direction
B. Transverse Direction
a. Location of the No.1 Piston Ring at TDC
b. Location of the Piston BDC
c. Location of the Oil Ring at BDC

Chamfer Angle

Wear Limit in Longitudinal and Transverse Direction

Permissible Deviation of Cylinder Out-of-round

Permissible Deviation of Rectangular Cylinder Height (Except Chamfered Area)

Basic Peak-to-valley Height After Final Honing and Brushing

Chamfer Angle

Honing Angle

When new

Wear limit

0.1 mm

0.007 mm

0.05 mm

0.05 mm

0.003 - 0.006 mm

60°

50° ± 10°

M162 ENGINE MECHANICAL 1B1-113

CRANKCASE MATING SURFACE

Service Data Standard

Height of The Crankcase “H” (When new)

Minimum Height After Milling

Flatness

Permissible Deviation of Parallelism of The

Upper to Lower Mating Surface

Peak-to-valley Height

Crankcase Upper Mating Surface

Crankcase Lower Mating Surface

Axial Direction

Transverse Direction

Crankcase Upper Mating Surface

Crankcase Lower Mating Surface

282.25 - 282.35mm

281.95mm

0.03mm

0.04mm

0.1mm

0.05mm

0.005 - 0.020mm

0.025mm

1B1-114 M162 ENGINE MECHANICAL

Chamfering Procedure

1. Chamfer angle : 60°

2. Polish the lower chamfered area evenly with a grinder after

finishing the chamfering with a suitable tool (e.g., hand milling
cutter).