7.3.3 Spark plug – Installation
Preconditions
☑
Engine is stopped and starting disabled.
☑
Open protective packing of new spark plug only immediately prior to installation.
Special tools, Material, Spare parts
Designation / Use
Part No.
Qty.
Torque wrench, 10–60 Nm
F30452769
1
Special wrench, 20.8 mm
F30452574
1
Assembly compound (Molycote P 37)
50564
1
Spark plug
(→ Spare Parts Catalog)
Sealing ring
(→ Spare Parts Catalog)
Spark plug connector with ignition cable
(→ Spare Parts Catalog)
Tab washer
(→ Spare Parts Catalog)
DANGER
Live components, flash-over.
Risk of serious injury - danger to life!
• Always wear electrical gloves (class 4 minimum) when touching the ignition cable in operation.
WARNING
Hot components/surfaces.
Risk of burns!
• Allow the engine to cool down to below 50 °C before beginning work.
• Wear suitable protective equipment/thermal gloves.
• Avoid unprotected contact with hot surfaces.
WARNING
Compressed air gun ejects a jet of pressurized air.
Risk of injury to eyes and damage to hearing, risk of rupturing internal organs!
• Never direct air jet at people.
• Always wear safety goggles/face mask and ear defenders.
Spark plug – Installation
1.
Remove dust and deposits from ignition line
on side facing spark plugs so that perfect
contact is achieved when reused.
2.
Install a new lower gasket in the ignition line.
3.
Check spark plug connector and ignition ca-
ble for perfect condition and replace any
damaged parts.
4.
Clean mating faces on spark plug, sealing
ring and cylinder head.
5.
Apply thin coat of assembly compound to
spark plug.
6.
Fit new sealing ring (2) on spark plug (1), po-
sitioning it correctly.
MS150034/04E 2016-11
| Ignition System | 147
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