Workshop maintenance
140
SPARK PLUG CHECK/RENEWAL
(petrol engines)
V8 engine
• Remove the HT leads from the spark
plugs.
• Remove the plugs using a spark plug
socket and ratchet.
• If they are in poor condition, replace with
new plugs of the correct specification (see
’General data’).
• Set the spark plug gaps to the correct
setting (see ’General data’).
• Fit the spark plugs and washers - DO NOT
OVERTIGHTEN.
NOTE: Fitting incorrect grades of spark plug,
may lead to piston overheating and engine
failure.
• Refit the HT leads in the correct order (as
illustration), ensuring that the leads are
firmly seated onto the plugs.
IGNITION WIRING & HT LEAD CHECK
Check the HT leads for insulation cracking, or
corrosion at end contacts. If the HT leads are
damaged, replace with new leads of the same
specification.
NOTE: Ensure leads are reconnected in the
correct order or the engine will misfire.
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