Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSJAGUAR1991XJ-6 L6-4.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIRREMOVAL AND INSTALLATION
1991 Jaguar XJ-6 L6-4.0L
Removal and Installation
1991 Jaguar XJ-6 L6-4.0LSECTION Removal and Installation
1. Be sure ignition switch is OFF.
2. Carefully remove ignition wires from spark plugs.
3. Remove spark plugs.
4. Check and adjust gap of new plugs to 0.9 mm (0.035 in) and refit.
5. Tighten plugs to 23 - 28 Nm (17 - 20 ft lb)
6. Refit ignition wires securely.
2. Carefully remove ignition wires from spark plugs.
3. Remove spark plugs.
Checking Spark Plug For Wear, Damage, Or Deposits:
4. Check and adjust gap of new plugs to 0.9 mm (0.035 in) and refit.
5. Tighten plugs to 23 - 28 Nm (17 - 20 ft lb)
6. Refit ignition wires securely.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.