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 MANAGEMENTEMISSION CONTROL SYSTEMSSPECIFICATIONSMECHANICAL SPECIFICATIONS
1991 Jaguar XJ-6 L6-4.0L
Mechanical Specifications
1991 Jaguar XJ-6 L6-4.0LSECTION Mechanical Specifications
AIR PUMP DRIVE BELT DEFLECTION 0.22 in (5.6 mm) @ 6.4 lb (2.9 kg)
EXHAUST EMISSIONS 0.5% CO max
SPARK PLUG GAP 0.035 in (0.9 mm)
SPARK PLUG TYPE Champion RC9YC
TORQUE VALUES
Downpipe To Under Floor Catalyst 11 - 13 ft lb (15 - 18 Nm)
Downpipe To Exhaust Manifold 22 - 26 ft lb (30 - 35 Nm)
EGR Valve Mounting Nuts 17 - 20 ft lb (23 - 27 Nm)
EGR Transfer Pipe To Gland 28 - 31 ft lb (38 - 42 Nm)
Oxygen Sensor 36 - 44 ft lb (50 - 60 Nm)
Union Gland to EGR Housing 28 - 31 ft lb (38 - 42 Nm)
Spark Plugs 12 - 21 ft lb (16.25 - 28.45 Nm)
EXHAUST EMISSIONS 0.5% CO max
SPARK PLUG GAP 0.035 in (0.9 mm)
SPARK PLUG TYPE Champion RC9YC
TORQUE VALUES
Downpipe To Under Floor Catalyst 11 - 13 ft lb (15 - 18 Nm)
Downpipe To Exhaust Manifold 22 - 26 ft lb (30 - 35 Nm)
EGR Valve Mounting Nuts 17 - 20 ft lb (23 - 27 Nm)
EGR Transfer Pipe To Gland 28 - 31 ft lb (38 - 42 Nm)
Oxygen Sensor 36 - 44 ft lb (50 - 60 Nm)
Union Gland to EGR Housing 28 - 31 ft lb (38 - 42 Nm)
Spark Plugs 12 - 21 ft lb (16.25 - 28.45 Nm)
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.