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7.3.2 Spark plug – Removal
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
Special wrench, 20.8 mm
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.
Removing spark plug
1.
Remove spark plug connector (1)
(→ Page 172).
2.
Unscrew spark plug a few turns.
3.
Clean spark plug bore with compressed air.
4.
Unscrew spark plug from cylinder head and
remove from spark plug bore.
168 | Ignition System | MS150121/02E 2017-09
Part No.
Qty.
F30452574
1
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