Setting work
Service and maintenance
© 2007
57
6
Set valve clearance for TCD 2012 L04/06
4V
z
Remove the cylinder head hood.
z
Let the engine cool down for at least 30 minutes
before setting the valve clearance: Lubricating oil
temperature below 80 °C.
z
Place turning gear over fastening screws of the
belt pulleys.
z
Tool (
74
).
z
Turn the engine until reaching valve overlap, cyl-
inder no. 1.
The cylinders to be set can be seen in the setting
schematic.
z
Note: Crankshaft means:
z
Outlet valve
EX
is not yet closed, inlet valve
IN
begins to open.
2
1
3
5
6
z
Set valve clearance on the corresponding cylin-
der using the valve clearance setting device
(Or-
der no.: 100340)
.
z
Loosen all locking nuts (3) of the rocker arm as-
sembly to be set.
z
Turn the setting screws (1) back by one rotation
anticlockwise.
z
Turn the setting screw (1) without clearance
clockwise on the rocker arm to be set. This
means, there must not be any clearance be-
tween the rocker arm and the valve (2) and no
pressure may be applied to the valve.
z
Set pointer (6) on the knurled handle (5) of the
measuring plate (4) to "0°"; do not twist the
knurled handle (5) anymore.
z
Hold the measuring plate (4) exactly in this posi-
tion and turn the setting screw (1) anticlockwise
using the knurled handle (5) until the pointer (6)
reaches the "in" or "ex" marking.
z
Hold the knurled handle (5) exactly in this posi-
tion and tighten the locking nut (3) using the
7
6
4
5
torque wrench (7) according to the 20 Nm tight-
ening specification.
z
Perform the setting procedure on every cylinder.
z
Mount gasket (new gasket if necessary).
z
Visually inspect screws and rubber elements, re-
place if necessary.
z
Mount cylinder head cover (with a new gasket if
necessary) and tighten the screws according to
tightening specification: 9 Nm (
74
).
z
Swing breather valve into position and fasten.
OBJ_DOKU-12638-001.fm Seite 57 Mittwoch, 22. August 2007 9:25 09
