2000GT

1967-1970 / Coupe / Japan

All 2000GT problems All workshop issues

Critical Cooling System

Radiator Core Degradation

Symptoms

Overheating, coolant loss, visible corrosion on radiator fins, reduced cooling efficiency.

Cause

The original aluminium crossflow radiator corrodes internally from age and coolant contamination. Dissimilar metals in the cooling system (aluminium radiator, iron block, brass fittings) create galvanic corrosion if the coolant is not maintained with the correct inhibitor package.

Fix

Re-core the original radiator with a new aluminium core (preserving the original tanks if possible for authenticity) or source a reproduction radiator from a specialist supplier.

Always flush the entire cooling system and use fresh coolant with the correct aluminium-compatible corrosion inhibitors.

Cost: $1,500-4,000 AUD for re-core or reproduction.

Cost mentioned in fix

Cost: $1,500-4,000

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// More 2000GT problems

Other known issues

Critical Cooling System

Water Pump Seal Failure

Coolant dripping from the water pump weep hole, low coolant level, overheating.

Common Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Carburettor Deterioration and Synchronisation Drift

Rough idle, uneven power delivery, flat spots during acceleration, poor fuel economy, and difficulty starting. The engine may run rich on some cylinders and lean on others.

Critical Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Timing Chain Stretch

Rattling or slapping noise from the front of the engine, particularly on cold startup. In advanced cases, the cam timing shifts, reducing power and causing rough running.

Critical Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Oil System Leaks (Dry Sump)

Oil puddles under the car, oil residue on the engine and chassis, dropping oil level in the external oil tank. Potential oil starvation if leaks are severe.

Common Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Valve Clearance Drift

Ticking noise from the valve train at operating temperature, gradual loss of power, uneven cylinder performance.

Common Body and Structure

Galvanic Corrosion at Mixed-Metal Joints

White powdery corrosion on aluminium panels, particularly where they attach to the steel chassis or steel substructure. Panels may become loose or develop cracks at attachment points.

View all 13 2000GT problems