Bulkhead Workshop › Land Rover models › Range Rover Classic 3.5 / 3.9 / 4.2 V8 fuel injection › Workshop guide › Chassis & bulkhead inspection, rust-proofing

Range Rover Classic 3.5 / 3.9 / 4.2 V8 fuel injection: chassis & bulkhead inspection, rust-proofing

Body & chassis · Range Rover Classic (1970–96) · 1985–1996

How often: every year. Steel chassis and bulkheads rot from the inside. Catching it early saves a chassis swap.

Work safely: support the vehicle on axle stands, never a jack alone; let it cool first. Check figures against your workshop manual. You do this work at your own risk.

Parts

Cavity wax (e.g. Dinitrol, Waxoyl)
Chassis paint / underseal (if needed)

Tools

Torch
Small hammer or screwdriver
Pressure washer

Step by step

Wash the underside thoroughly and let it dry.
Tap the chassis with a small hammer. A dull thud or flaking means rust. Check the rear crossmember, the outriggers, the spring hangers and around the rear body mounts.
Check the bulkhead footwells and door pillar feet, the windscreen frame corners, and the steel door frames where they meet the aluminium skins.
Check the fuel tank straps and brake pipe clips.
Inject cavity wax into the chassis rails through the existing holes and treat any bare metal.

More Range Rover Classic 3.5 / 3.9 / 4.2 V8 fuel injection servicing

Engine oil & filter change every 6,000 mi or 6 months
Air filter element every 12,000 mi or year
Plugs, leads & ignition timing every 12,000 mi or year
Fuel injection checks & fuel filter every 12,000 mi or year
Fan / auxiliary belt check every 12,000 mi or year
Coolant drain, flush & refill every 2 yrs
Grease propshafts every 6,000 mi or 6 months
Check swivel housings & seals every 12,000 mi or year
Check gearbox, transfer & axle oil levels every 12,000 mi or year
Change gearbox & transfer box oil every 24,000 mi or 2 yrs
Change front & rear axle oil every 24,000 mi or 2 yrs
Steering & power steering check every 12,000 mi or year
Inspect pads, discs & brake hoses every 12,000 mi or year
Adjust transmission handbrake every 12,000 mi or year
Brake & clutch fluid change every 2 yrs
Suspension bushes, arms & dampers every 12,000 mi or year
Wheel bearings & hub seals every 24,000 mi or 2 yrs
Automatic gearbox fluid & filter change every 24,000 mi or 2 yrs
Borg Warner transfer box & viscous coupling check every 24,000 mi or 2 yrs
Annual safety inspection every year
Monthly walk-round checks every month

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