1994 Jaguar XJ12FACTORY OEM SERVICE PROCEDURE

Spark Plugs

SPARK PLUG TYPE

Application Type
4.0L Champion No. RC9YC
6.0L NGK No. BR7EF
SPARK PLUG SPECIFICATIONS

Application Gap: In. (mm) Torque
4.0L .035 (.89) 12-38 (16-28)
6.0L .025 (.64) 16-22 (22-30)
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.