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MOTRS

2000GT

1967-1970 / Coupe / Japan

All 2000GT problems All workshop issues
Critical Engine, 3M 2.0L DOHC Inline-6 (Yamaha-Built)

Oil System Leaks (Dry Sump)

Symptoms

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.

Cause

The 3M's dry-sump system uses external oil lines, an external oil tank, and a separate scavenge pump, all with joints, seals, and fittings that deteriorate with age. Cars that sit for extended periods are particularly prone to oil line seal hardening and cracking.

Fix

Inspect all oil lines, fittings, and the oil tank for weeping or active leaks.

Replace any hardened or cracked lines with correct-specification replacements.

The oil tank itself can develop pinhole leaks from internal corrosion if old oil with moisture contamination has been left in it.

Cost: $1,000-5,000 AUD depending on the extent of replacement needed.

Cost mentioned in fix
Cost: $1,000-5,000

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// More 2000GT problems

Other known issues

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.
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.
Critical Cooling System

Radiator Core Degradation

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

Water Pump Seal Failure

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