1B3-138 OM600 ENGINE MECHANICAL
6. Check the timing.
New
After approx. 20,000km
ATDC 11.33°
ATDC 12°
Notice
If timing is out standard, the camshaft should be checked
for wear and the timing chain for stretch. If a difference of
more than 4° exists, the timing chain should be replaced.
7. Replace the gasket and install the cylinder head cover.
Tightening Torque 10 Nm
Measurement Procedure
1. Remove the cylinder head cover.
2. Rotate the engine in the direction of engine rotation until
the intake valve of NO. 1 cylinder is completely closed. The
cam lobe faces up (arrow).
Notice
Do not rotate the engine at the bolt of the crankshaft
sprocket. Do not rotate the engine in the opposite direction
of engine rotation. If do, this will cause serious measuring
errors.
3. Install the dial gauge holder and dial gauge (7) with the
extension (8) to the cylinder head and position the tracer
pin (9) onto the valve tappet (intake valve of cylinder NO.1)
with a preload of min. 3mm.
Notice
The tracer pin should be positioned exactly vertical.
Dial gauge Holder 363 589 02 21 00
Dial Gauge 001 589 53 21 00
Extension 366 589 00 21 05
4. Set the dial gauge to ‘0’.
5. Rotate the engine further in direction of rotation until the
dial gauge has moved back by 2mm (valve lift) to 1mm.
Tools Required
001 589 53 21 00 Dial Gauge
363 589 02 21 00 Dial Gauge Holder
366 589 00 21 05 Extension
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