Service Data and Specifications (S.D.S.) — Inspection and Adjustment — CD20
EM-279spec tableCD20 diesel engine specifications.
COMPRESSION PRESSURE
Compression Pressure (Unit: kPa (bar, kg/cm², psi) at 200 rpm)
Standard
Value3,138 (31.4, 32, 455)
Limit
Value2,452 (24.5, 25, 356)
Difference limit between cylinders
Value490 (4.9, 5, 71)
CYLINDER HEAD
Cylinder Head (Unit: mm (in))
Head surface flatness
Sub-itemStandard
ValueLess than 0.05 (0.0020)
Head surface flatness
Sub-itemLimit
Value0.1 (0.004)
Nominal cylinder head height
Sub-item
Value137.9 - 138.1 (5.429 - 5.437)
CAMSHAFT AND CAMSHAFT BEARING
Camshaft and Camshaft Bearing (Unit: mm (in))
Camshaft journal clearance
Standard0.045 - 0.086 (0.0018 - 0.0034)
Max. tolerance0.1 (0.004)
Inner diameter of camshaft bearing
Standard30.000 - 30.021 (1.1811 - 1.1819)
Max. tolerance—
Outer diameter of camshaft journal
Standard29.935 - 29.955 (1.1785 - 1.1793)
Max. tolerance—
Camshaft runout
StandardLess than 0.02 (0.0008)
Max. tolerance0.05 (0.0020)
Camshaft end play
Standard0.115 - 0.188 (0.0045 - 0.0074)
Max. tolerance—
Cam height "A" (Unit: mm (in))
Intake
Value49.20 - 49.30 (1.9370 - 1.9409)
Exhaust
Value49.15 - 49.25 (1.9350 - 1.9390)
VALVE
Valve (Unit: mm (in))
Valve head diameter "D"
Sub-itemIntake
Value39.0 - 39.2 (1.535 - 1.543)
Valve head diameter "D"
Sub-itemExhaust
Value32.0 - 32.2 (1.260 - 1.268)
Valve length "L"
Sub-itemIntake
Value100.53 - 100.97 (3.9579 - 3.9752)
Valve length "L"
Sub-itemExhaust
Value100.38 - 100.82 (3.9520 - 3.9693)
Valve stem diameter "d"
Sub-itemIntake
Value6.965 - 6.980 (0.2742 - 0.2748)
Valve stem diameter "d"
Sub-itemExhaust
Value6.945 - 6.960 (0.2734 - 0.2740)
Valve seat angle "α"
Sub-item
Value45°30'
Valve margin "T" limit
Sub-item
Value0.5 (0.020)
Valve stem end surface grinding limit
Sub-item
Value0.5 (0.020)