Spark Plug - Removal - MTU 12V 4000 L64 Operating Instructions Manual

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 174).
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.
170 | Ignition System | MS15027/04E 2017-08
Part No. Qty.
F30452574 1