XJ6 (Series I-III)

1968-1992 / Sedan / United Kingdom

All XJ6 (Series I-III) problems All workshop issues

Common Climate Control

Heater matrix leak

Symptoms

Coolant smell in the cabin, damp carpet on the passenger side, fogged windscreen. Coolant level drops with no external leak.

Cause

The heater matrix, a small radiator inside the dashboard, corrodes and develops leaks. Old coolant or running plain water accelerates the corrosion.

Fix

Replace the heater matrix.

Unfortunately, this usually requires significant dashboard disassembly.

Budget $500-1,500 AUD including labour.

Run proper coolant mix after replacement.

Cost mentioned in fix

Budget $500-1,500

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// More XJ6 (Series I-III) problems

Other known issues

Minor Climate Control

Air conditioning system failure

A/C doesn't cool, compressor won't engage, strange noises from under the bonnet.

Minor Bodywork and Rust

Sill corrosion (structural)

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.

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.

View all 28 XJ6 (Series I-III) problems