Ranger 4WD V6-4.0L (2009)
7. NOTE: Use compressed air to remove any foreign material in the spark plug wells before removing the spark plugs.
NOTE: If an original spark plug is reused, make sure it is installed in the same cylinder from which it was removed. New spark plugs can be used
in any cylinder.
Remove the LH spark plugs.
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To install, tighten to 15 Nm (133 lb-in).
8. Inspect the spark plugs.
9. Use a suitable spark plug gap tool to check and adjust the spark plug gap.
10. To install, reverse the removal procedure.
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Apply silicone dielectric compound to the inside of the spark plug wire boots prior to installation.
