Workshop Manuals Factory service & repair Rover
Rover Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition18 · Electrical
18 · Electrical

86M 2042 (page 3 of 3)

Make
Rover
Model
600 Rover 600 Repair Manual - Volumes 1 and 2 - 2nd Edition
Section
Repairs
Electrical86M 2042 · page 3 of 3
Diagram of a spark plug with labels A, B, C, D, and E pointing to various components

86M 2048

  • A Cracked electrode insulator
  • B Anti-sieze compound
  • C Cracked insulator
  • D Damaged gasket
  • E Worn electrode
  1. Inspect the electrodes and ceramic insulator for:

Burned or worn electrodes may be caused by:

  • advanced ignition timing.
  • loose spark plug.
  • too low plug heat range.
  • insufficient cooling.

Fouled plug may be caused by:

  • retarded ignition timing.
  • oil in combustion chamber.
  • too high plug heat range.
  • excessive idling/low speed running.
  • clogged air cleaner element.
  • deteriorated ignition coil or ignition wires.
  • incorrect spark plug gap.
1.0–1.1 mm
(0.039–0.043 in)
Diagram showing the measurement of the spark plug electrode gap

86M 2049

  1. Adjust the gap with a suitable gapping tool.
    Electrode Gap: 1.0 – 1.1 mm
Diagram showing a rounded centre electrode on a spark plug

86M 2050

  • A Rounded electrode
  1. Replace the plug if the centre electrode is rounded as shown below.
  2. Replace the plug if it is fouled or worn.

Note: Use only the spark plugs listed below.
GSP 7664
ZFR6F-11 (NGK)
KJ20CR-L11 *(ND)		 For all normal driving
GSP 7668
ZRF7-11 (NGK)
KJ22CR-L11 *(ND)		 For hot climates or continuous high speed driving
GSP 7666
ZFR5F-11 (NGK)
KJ16CR-L11 *(ND)		 For cold climates

*(ND): NIPPONDENSO

  1. Apply a small quantity of anti-seize compound to the plug threads.
  2. Screw the plugs into the cylinder head finger-tight, then torque them to 18Nm.

Parts & tools for this job For Rover 600

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