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MOTRS

Land Cruiser 40 Series

1960-1984 / SUV / Utility / Japan

All Land Cruiser 40 Series problems All workshop issues
Critical Rust

Sill and Rocker Panel Decay

Symptoms

The sills (the structural members running along the bottom of the body below the doors) rust from the inside out. External paint may look fine while the interior is completely hollowed.

Cause

Mud, water, and debris enter the sills through gaps and drain holes. In outback use, fine red dust packs into every cavity and absorbs moisture like a sponge. The sills are box sections that trap moisture with no ventilation. Vehicles that have been parked in paddocks or under trees for years are worst affected.

Fix

Tap along the sills with a hammer to identify the extent of the rust (solid metal rings, rotten metal thuds or gives way).

Minor localised rust can be cut and patched.

Full sill replacement requires stripping the body panels and is a $3,000-6,000 repair.

This is a job for a qualified fabricator, the sills are structural and must be welded correctly.

Cost mentioned in fix
$3,000-6,000

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Other known issues

Critical Rust

Floor Pan Corrosion

The floor pans develop surface rust, then pitting, then perforation. In advanced cases, the driver can see the ground through the floor. The seat mounting points lose structural integrity.
Critical Rust

Firewall Rot

The firewall develops rust around penetrations, where the clutch master cylinder, brake master cylinder, wiring harnesses, and heater hoses pass through the bulkhead. In severe cases, the firewall becomes structurally compromised.
Critical Cooling System

Chronic Overheating (F and 2F Engines)

The temperature gauge climbs above normal under load, on hills, towing, or in slow traffic. In severe cases, the engine boils over and dumps coolant.
Common Cooling System

Diesel Engines and Cavitation

The B, 3B, H, and 2H diesels develop pinhole leaks in the cylinder liners and coolant passages. Coolant loss with no visible external leak. White residue around coolant hose connections.
Common Steering

Steering Box Excessive Play

The steering wheel has significant free play before the front wheels respond. At highway speeds, the vehicle wanders and requires constant correction. The steering feels vague and imprecise.
Minor Steering

Steering Damper Failure

Vibration or shimmy through the steering wheel at certain speeds. The steering feels harsh over bumps.
View all 12 Land Cruiser 40 Series problems