Mitsubishi 6D22

Mitsubishi 6D22The Mitsubishi 6D22 is an 11.1 L (11,149 cc, 680.0 cu·in) straight-six, water-cooled naturally aspirated diesel engine, manufactured and used by Mitsubishi Fuso Truck and Bus Corporation.

The MMC 6D22 has a cylinder block with wet type liners, an cylinder head with OHV (overhead valves), and two valves per cylinder. The 6D22 compression ratio is 17.0:1. Cylinder bore and piston stroke are 130.0 mm (5.12 in) and 140.0 mm (5.51 in), respectively.

The Mitsubishi 6D22 engine produced from 148.0 PS (109.0 kW; 146.0 HP) at 1,500 rpm to 203.0 PS (149.0 kW; 200.0 HP) at 2,200 rpm of maximum output power.

General information

Engine Specifications
Engine code6D22
LayoutStraight-6, vertical
Fuel typeDiesel
Production
Displacement11.1 L (11,149 cc, 680.0 cu·in)
Injection pumpBosch in-line type
Power adderNone
Horsepower From 148.0 PS (109.0 kW; 146.0 HP) at 1,500 rpm
to 203.0 PS (149.0 kW; 200.0 HP) at 2,200 rpm
Torque output
Injection order1-5-3-6-2-4
Dimensions (L x H x W):1,390 x 898 x 1,023 mm (54.7 x 35.4 x 40.3 in)
Weight980 kg (2160 lbs)

Cylinder block

The engine has a drop-forged steel crankshaft with balance weights and seven main bearings. The piston, made of aluminum alloy casting, has a toroidal-type combustion chamber at its top. The 6D22 motor has two compression and a single oil control ring. The cylinder bore is 130.0 mm (5.12 in), piston stroke is 140.0 mm (5.51 in) and compression ratio rating is 17.0:1. The crankshaft main journal diameter is 100.0 mm (3.94 in) and the crankpin diameter is 84.0 mm (3.30 in).

Cylinder block
Cylinder block alloyCast iron
Compression ratio:17.0:1
Cylinder bore:130.0 mm (5.12 in)
Piston stroke:140.0 mm (5.51 in)
Number of piston rings (compression / oil):2/1
Number of main bearings:7
Block Height:
Cylinder liner inner diameter:130.014-130.054 mm (5.1187-5.1202 in)
Piston skirt diameter
Piston ring side clearance:Top0.060-0.0110 mm (0.0024-0.0004 in)
Second0.050-0.080 mm (0.002-0.0031 in)
Oil0.030-0.060 mm (0.0012-0.0024 in)
Crankshaft main journal diameter:100.0 mm (3.937 in)
Crankpin diameter:84.0 mm (3.3071 in)

Cylinder head

Cylinder head
Valve Arrangement:OHV, gear driven
Valves:12 (2 valves per cylinder)
Intake valves diameter:
Exhaust valves diameter:
Intake valve timing:
Exhaust valve timing:
Inlet valves length:
Exhaust valves length:
Intake valve stem diameter:11.950-11.960 mm (0.4705-0.4709 in)
Exhaust valves stem diameter:11.910-11.930 mm (0.4689-0.4697 in)
Camshaft journal diameter:29.935-29.955 mm (1.1785-1.1793 in)
Valve spring free length (INTAKE/EXHAUST) Outer: 89.38 mm (3.5189 in)
Inner: 65.04 mm (2.5606 in)

Maintenance data

Compression pressure
Standard2.75 MPa (28 kgf/cm2)
Minimun1.96 MPa (20 kgf/cm2
Compression differential limit between cylinders0.39 MPa (4 kgf/cm2)
Valve clearance
Intake valve clearance (COLD):0.40 mm (0.0157 in)
Exhaust valve clearance (COLD):0.60 mm (0.0236 in)
Oil system
Recommended engine oilCC or better
Engine oil capacity Without filter: 27.0 L (for general power) or 25.0 L (for construction machinery)
Filter: 4.0-4.5 L
Oil pressure
(Oil temperature at 70 to 90″C)
At idle speed: 145 kPa (1.5 kgf/cm2 or more
At maximum speed: 295 to 490 kPa (3 to 5 kgf/cm2)
Fuel system
Injection pumpBosch in-line type (model AD)
Plunger diameter10.5 mm (0.4134 in)
Injection nozzleHole type (1-spring nozzle) – model DLLA
Injection pressure21.6 MPa (220 (kgf/cm2)
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