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 (Molykote P 37)
50564
1
Spark plug
(→ Spare Parts Catalog)
Sealing ring
(→ Spare Parts Catalog)
Spark plug connector with ignition line
(→ Spare Parts Catalog)
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.
Installing spark plug
1.
Clean and dry the mating surfaces on spark
plug (1), sealing ring (2) and cylinder head.
2.
Fit new sealing ring (2) on spark plug (1) with
the flat side facing the insulator.
3.
Check satisfactory condition of spark plug
connector and ignition cable, replace parts if
damaged.
4.
Apply thin coat of assembly compound to
spark plug thread.
MS150104/03E 2017-09
| Ignition System | 169
TIM-ID: 0000043425 - 004
