Nissan Patrol: Rear leaf spring mount and chassis rail corrosion

Y60 Patrols operated in coastal Australia or wet AU regions develop heavy rust in the rear chassis rails, leaf spring perches, and shackle mount areas. The boxed chassis sections trap moisture and road salt, corroding from the inside out. Leaf spring mount corrosion can cause spring perch failure under load, which is a structural and safety failure. Especially prevalent on Australian vehicles that have been near the coast or used in wet conditions for their working life.

• Visible surface rust or bubbling paint on chassis rails near rear axle
• Leaf spring perches showing heavy scale rust or pitting
• Creaking or movement at spring mounts under load
• Roadworthy failure on chassis inspection

1. 1

   Get under the vehicle and inspect all four chassis rails from front to rear, paying particular attention to the rear leaf spring perch weld points, shackle mounts, and crossmember junctions.

2. 2

   Probe with a screwdriver — any soft spots indicate structural rust.

3. 3

   Check that the spring eye bolts are not seized or corroded through.

Parts involved: Chassis and structural rust, Rear leaf spring, Body corrosion.

≈A$1,380 to ≈A$5,520 at independent workshop rates, shown as an approximate guide in Australian dollars. That is for this job on its own, not for the car.

An estimate, converted to Australian dollars, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Where has the vehicle spent most of its life — coastal, rural, or urban?”
• “Has the chassis ever been repaired, plated, or rust-treated?”
• “Has it passed a recent roadworthy with no chassis issues noted?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.