Doosan G643E - Page 34

G643 (E) Service Manual Chapter 3. Engine Mechanical System 32
Specification
General
Type ................................................90 Degree V6
Displacement................................. 4.3L (262 CID)
RPO (VIN Code)......................... L35 (W), LF6 (X)
Bore.........................................101.6 mm (4.00 in)
Stroke....................................88.39 mm (3.480 in)
Compression Ratio ....................................... 9.2:1
Firing Order .........................................1-6-5-4-3-2
Lubrication System
Oil Capacity
Without Filter Change .........................4.3 Liters
With Filter Change Add .......................0.5 Liters
Oil Pressure (Minimum Hot)
..................41.4 kPa (6.0 psi) at 1,000 engine rpm
.............. 124.1 kPa (18.0 psi) at 2,000 engine rpm
.............. 165.5 kPa (24.0 psi) at 4,000 engine rpm
OIl Filter System ..................................... Full Flow
OIl Pump Type................................... Gear Driven
Cylinder Bore
Diameter.101.618-101.643 mm (4.0007-4.0017 in)
Out-of Round .............. 0.0508 m (.002 in) MAX.
Taper ........................ 0.0254 mm (.001 in) MAX
Piston
Piston Bore Clearance
............................ 0.06096 mm (.0024 in) MAX.
Piston Rings
Piston Compression Ring
Groove Clearance........ 0.010668 mm (.0042 in)
Gap ........................... 0.889 mm (.035 in) MAX.
Piston Oil Ring
Groove Clearance.... 0.2032 mm (.008 in) MAX.
Gap .....................................1.651 mm (.065 in)
Oil Pan
Engine Block Clearance
Tolerance................... 0.254 mm (.010 in) MAX.
Piston Pin
Diameter............ 23.545-23.548 mm (.927-.926 in)
Clearance in Piston.. 0.0254 mm (.001 in) MAX.
Fit In Connecting Rod
0.02032-0.04064 mm (.0008-.0016 in) Interference
Exhaust Manifold
Surface Flatness........ 0.254 mm (.010 in) MAX.
Intake Manifold
Surface Flatness........ 0.254 mm (.010 in) MAX.
Cylinder Head
Surface Flatness...... 0.1016 mm (.004 in) MAX.
Crankshaft
Crankshaft Journal
Diameter #1
...............62.199-62.217 mm (2.4488-2.4495 in)
Diameter 2, #3
...............62.192-62.215 mm (2.4485-2.4494 in)
Diameter #4
...............62.180-62.202 mm (2.4480-2.4489 in)
Taper.......................0.0254 mm (.001 in.) MAX.
Out-of Round...........0.025 mm (.0010 in.) MAX.
Crankshaft Bearing Clearance
Bearing #1
...................0.0254-0.0381 mm (.0010-.0015 in)
Bearing #2, #3
...................0.0254-0.0635 mm (.0010-.0025 in)
Bearing #4
...................0.0635-0.0889 mm (.0025-.0035 in)
Crankshaft End Play
.......................... 0.0508-0.2032 mm (.002-.008 in)
Connecting Rod
Connecting Rod Journal
Diameter.57.117-57.142 mm (2.2487-2.2497 in)
Taper........................0.0254 mm (.001 in) MAX.
Out-of-Round............0.0254 mm (.001 in) MAX.
Rod Bearing Clearance
...................0.0254-0.0762 mm (.0010-.0030 in)
Rod Side Clearance
...................... 0.1524-0.4318 mm (.006-.017 in)
Camshaft
Journal Diameter
...................47.440-47.490 mm (1.8677-1.8697 in)
End Play...........0.0254-0.2286 mm (.001-0.009 in)
Lobe Lift ................................. ± 0.05 mm (.002 in)
Intake .............................. 7.018 mm (0.2763 in)
Exhaust ........................... 7.252 mm (0.2855 in)
Balance Shaft
Front Bearing Journal Diameter
...............55.985-55.001 mm (2.1648-2.1654 in)
Rear Bearing Journal Diameter
.................38.084-38.100 mm (1.4994-1.500 in)
Rear Bearing Journal Clearance
...................0.0254-0.09144 mm (.001-.0036 in)
Valve System
Valve Lifter ...................................Hydraulic Roller
Valve Rocker Arm Ratio ..............................1.50:1
Valve Lash ......................Net Lash No Adjustment
Face Angle............................................45 degree
Seat Angle.............................................46 degree
Seat Runout .................0.0508 mm (.002 in) MAX.
Seat Width Intake
.......................... 1.016-1.651 mm (.040-.065 in)
Exhaust ............. 1.651-2.489 mm (.065-.098 in)
Stem Clearance
Intake