Spark plugs - V8 engine (Maintenance)

Spark plugs - V8 engine

Replace

Take great care when fitting spark plugs not to cross-thread plug, otherwise costly damage to cylinder head will result. It is essential that correct grade of spark plugs are fitted. Incorrect grade of spark plugs may lead to piston overheating and engine failure. Use only approved spark plugs, use of unapproved spark plugs may cause the misfire detection system to malfunction.

1. Disconnect battery earth lead.
2. Noting their fitted position, disconnect ht leads from spark plugs.
3. Remove 8 spark plugs.
4. Ensure that gap of new spark plugs is 1.0 ± 0.05 mm (0.040 ± 0.002 in).

Do not attempt to clean or adjust gaps. If a spark plug problem exists, try substituting defective spark plug(s) with new one(s).

CAUTION: Do not attempt to clean or adjust spark plug gaps. If a spark plug problem exists, try substituting the defective spark plug with a new one.

5. Fit spark plugs and tighten to 20 Nm (15 lbf.ft).

6. Connect ht leads to spark plugs.
7. Connect battery earth lead.