Spark Plug: Service and Repair

WM 287020 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 socket and extension 3122 B. => Loosening spark plugs using spark plug socket and extension





Loosening spark plugs using spark plug socket and extension

1.1. The spark plugs for cylinders 3, 4 and 8 need a shorter tool setup. Use a medium extension with a cardan joint and spark plug socket for this.

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/V6 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/V6 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 socket and extension 3122 B. => Tightening spark plugs using spark plug socket and extension





Tightening spark plugs using spark plug socket and extension

3.1. The spark plugs for cylinders 3, 4 and 8 (as for the V6) need a shorter tool setup. Use a medium extension with a cardan joint and spark plug socket for this.

Subsequent work

1. Install bar ignition modules. -> 282020 Removing and installing bar ignition modules Service and Repair