Valve Clearance Adjust Procedure - Doosan V158TI Operation & Maintenance Manual

6.3.22. Valve clearance adjust procedure

Method 1
1) Rotate the crankshaft so that #1. cylinder may be positioned at the compression TDC (Top Dead Cen-
ter).
Note :
#1. Cylinder is located at the side where cooling water pump was installed.
In case of 8/12 cylinder engine, #6. cylinder is positioned at the valve overlap when #1. cylinder is
positioned at the compression TDC (Top dead center).
In case of 10 cylinder engine, #7. cylinder is positioned at the valve overlap when #1. cylinder is
positioned at the compression TDC (Top dead center).
Flywheel
2) Loosen the lock nut of the #1. cylinder
rocker arm.
3) Push the feeler gauge between a rocker
arm and a valve stem.
4) Adjust the clearance screw respectively
and then tighten with the lock nut.
5) As for the valve clearance, adjust it when in cold, as follows.
In. Valve
0.25 mm
6) Rotate the crankshaft. When a cylinder reaches the compression TDC (Top Dead Center), adjust the
valve clearance of the cylinder
Disassembly and assembly of major components
Cooling fan
5
1
6
2
8
7
7
6
3
5
4
3
8
2
4
1
8 Cylinder engine
Specified Value
Ex. Valve
0.35 mm
6
1
7
2
8
10
3
9
8
7
9
6
4
5
4
3
10
2
5
1
10 Cylinder engine
Measurement Tolerance
In. Valve
- 104 -
7
1
8
2
9
12
3
11
10
10
9
4
8
7
6
11
5
5
4
3
12
2
6
1
12 Cylinder engine
EA6O6008
2
3
1
EDV2218007
Ex. Valve
±0.05 mm