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MOTRS

XJ6 (Series I-III)

1968-1992 / Sedan / United Kingdom

All XJ6 (Series I-III) problems All workshop issues
Minor Bodywork and Rust

Sill corrosion (structural)

Symptoms

Outer sills bubble and perforate. Inner sills rot silently behind trim. The car's rigidity decreases, doors sag, gaps become uneven, and the body flexes over bumps.

Cause

Water enters the sill box sections through blocked drain holes, failed door seals, and stone chip damage. The inner sill rots first, hidden from view. By the time the outer sill shows rust, the inner structure may be gone.

Fix

Full sill replacement, outer and inner.

The car must be properly supported (ideally on a jig) during the work to prevent distortion.

Replacement panels are available for all series.

Budget $4,000-8,000 AUD for professional sill repairs on both sides.

Cost mentioned in fix
Budget $4,000-8,000

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// More XJ6 (Series I-III) problems

Other known issues

Minor Bodywork and Rust

Floor pan corrosion

Floor pans rot from underneath or from above (water sitting under carpets). In severe cases, you can see the road through the floor.
Common Bodywork and Rust

Rear wheel arch and lower rear quarter corrosion

Rust appears at the bottom of the rear wings, around the wheel arches, and in the lower panels between the wheels and boot.
Common Bodywork and Rust

Boot floor and spare wheel well corrosion

The boot floor rusts through, the spare wheel well fills with water, and the rot spreads to surrounding panels.
Common Bodywork and Rust

Front wing corrosion

Bubbling around headlights, indicator mounts, and the bottom edges of the front wings.
Common Engine

XK engine oil leaks

Oil weeps from cam covers, timing chain cover, sump gasket, and rear main seal. The engine bay is perpetually oily. Oil drips on the exhaust and creates smoke.
Common Engine

Cooling system inadequacy

Engine runs hot, particularly in traffic or on warm days. Temperature gauge climbs, coolant may boil over, heater blows hot when it shouldn't.
View all 28 XJ6 (Series I-III) problems