Spark Plug: Service and Repair
WM 287055 Removing and installing spark plugs
Tools
Technical values
Preliminary work
1. Switch off ignition and remove ignition key.
2. Remove bar ignition modules. -> 282020 Removing and installing bar ignition modules Service and Repair
Removing spark plugs
Information
- Use only spark plugs approved by Porsche AG!
- Check electrode gap before screwing in a new spark plug.
1. Loosen spark plugs using special tool spark plug wrench 3122 B. => Loosening spark plugs using spark plug wrench
Loosening spark plugs using spark plug wrench
NOTICE
Broken spark plug electrodes
- Bits of electrodes can fall into the combustion chamber
-> Only check electrode gap of spark plugs, but do not bend them.
-> Spark plugs with an incorrect electrode gap must be replaced.
2. Check electrode gap in V8 naturally aspirated engine. => Control value: 1.6 mm => Electrode gap of spark plug in V8 naturally aspirated engine
Electrode gap of spark plug in V8 naturally aspirated engine
3. Check electrode gap in V8 turbo engine.=> Control value: 0.8 mm+/-0.05 mm => Electrode gap of spark plug in V8 turbo engine
Electrode gap of spark plug in V8 turbo engine
Installing spark plugs
NOTICE
Broken spark plug electrodes
- Bits of electrodes can fall into the combustion chamber
-> Only check electrode gap of spark plugs, but do not bend them.
-> Spark plugs with an incorrect electrode gap must be replaced.
Information
- The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.
Information
- Use only spark plugs approved by Porsche AG!
- Check electrode gap before screwing in a new spark plug.
1. Check electrode gap in V8 naturally aspirated engine. => Control value: 1.6 mm => Electrode gap of spark plug in V8 naturally aspirated engine
Electrode gap of spark plug in V8 naturally aspirated engine
2. Check electrode gap in V8 turbo engine.=> Control value: 0.8 mm => Electrode gap of spark plug in V8 turbo engine
Electrode gap of spark plug in V8 turbo engine
3. Tighten spark plugs using special tool spark plug wrench 3122 B. => Tightening spark plugs using spark plug wrench
Tightening spark plugs using spark plug wrench
Subsequent work
1. Install bar ignition modules. -> 282020 Removing and installing bar ignition modules Service and Repair