Commodore (VB-VL)

1978-1988 / Sedan / Estate / Australia

All Commodore (VB-VL) problems All workshop issues

Critical Engine, Holden V8 (253/308)

Overheating in Traffic

Symptoms

Temperature gauge climbs into the red zone in slow traffic or on hot days. May push coolant out the overflow.

Cause

The VB and VC cooling systems are marginal for the V8, particularly in Australian summer conditions. The factory radiator is often undersized, the clutch fan loses efficiency when worn, and the thermostat housing gasket can leak, reducing coolant flow.

Fix

Upgrade to a 3-core brass or aluminium radiator.

Fit a thermo fan conversion (Davies Craig or similar) to replace the clutch fan.

Ensure the thermostat is the correct rating (82°C) and the water pump is in good condition.

A coolant flush and fresh coolant goes a long way.

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// More Commodore (VB-VL) problems

Other known issues

Common Engine, Holden V8 (253/308)

Worn Valve Train

Ticking or clattering from the top of the engine. May be constant or vary with RPM.

Minor Engine, Holden Six (3.3L / 202ci)

Worn Valve Stem Seals

Blue smoke on startup that clears after 30 seconds to a minute. May also smoke briefly on deceleration after sustained highway driving.

Common Engine, Holden Six (3.3L / 202ci)

Carburettor Issues (VB-VH)

Hard starting, rough idle, flat spots on acceleration, flooding, poor fuel economy, black smoke.

Critical Engine, Holden Six (3.3L / 202ci)

Oil Leaks (All Holden Six and V8)

Oil on the garage floor, oil smell, oil coating on the underside of the engine.

Critical Engine, Nissan RB30E (VL naturally aspirated)

Timing Chain Stretch

Rattling noise from the front of the engine on cold start. Rough idle that may smooth out as the engine warms.

Common Engine, Nissan RB30E (VL naturally aspirated)

Oil Consumption

Oil level drops between services. No visible external leaks.

View all 21 Commodore (VB-VL) problems