1994 ROLLS-ROYCE SILVER SPUR

Typical onset: 70,000-120,000 mi

Symptoms: Rear end sags after sitting overnight or takes minutes to level, Hydraulic pump runs continuously or cycles excessively, Green mineral oil leaks near rear subframe or accumulator sphere, Harsh ride quality or bottoming out over bumps

Fix: Accumulator spheres lose nitrogen charge, hydraulic lines crack from age, and height corrector valves seize. Accumulator replacement takes 2-3 hours, but full system overhaul (lines, pump rebuild, all four spheres, reservoir) runs 12-16 hours. Most shops replace rather than rebuild accumulators due to core availability.

Estimated cost: $2,800-6,500

Typical onset: 90,000-150,000 mi

Symptoms: Blue smoke on cold start that clears after warmup, One quart per 500-800 miles consumption rate, Carbon buildup on spark plugs, misfires on acceleration, Loss of compression in one or more cylinders

Fix: The alloy pistons wear rings in grooves, and valve stem seals harden. Minor fix is valve seals only (8-10 hours), but most high-milers need full ring job or short block. Re-ring with hone and bearings is 24-30 hours; short block swap is 28-35 hours with ancillary refresh.

Estimated cost: $4,500-12,000

Symptoms: Hot-start stumbling or no-start after heat soak in warm weather, Intermittent stalling at operating temperature, restarts when cool, Rough idle with fuel pressure fluctuations, Tank debris clogs fuel filter within 3,000 miles of replacement

Fix: Twin-tank K-Jetronic system routes fuel through engine valley; heat causes vapor lock. Deteriorated rubber fuel hoses inside tank shed particles. Requires both tank removals, hose replacement, booster pump inspection, accumulator testing, and often fuel distributor rebuild. Budget 16-20 hours for comprehensive fix including line insulation improvements.

Estimated cost: $3,200-5,800

Typical onset: 80,000-140,000 mi

Symptoms: ATF puddle under front of vehicle, rapid fluid loss, Transmission slipping or delayed engagement after short drive, Pink fluid mixed with coolant in expansion tank, Sudden loss of all gears, limp mode

Fix: Steel cooler lines rust through at chassis mount points; internal cooler in radiator can fail and cross-contaminate coolant into ATF (catastrophic). External line replacement is 3-4 hours, but coolant contamination requires transmission flush, torque converter replacement, and sometimes full rebuild—18-25 hours total. Always replace all cooler lines and external cooler during any repair.

Estimated cost: $800-8,500

Typical onset: 100,000+ mi or 20+ years regardless of miles

Symptoms: Spongy pedal that doesn't improve with bleeding, Visible rust scale or green corrosion on steel brake lines at rear subframe, Brake fluid leaking at line unions or crimped fittings, Low pedal with extended stop required

Fix: Factory steel lines corrode from road salt and moisture, particularly rear hard lines along subframe. Piecemeal fixes fail quickly; best practice is full brake line replacement front to rear with NiCopp or stainless. Requires subframe access and hydraulic system work—14-18 hours for complete renewal.

Estimated cost: $2,400-4,200

Symptoms: Blend doors stuck on full heat or full cold regardless of setting, Clicking or grinding noise from behind dash on startup, One side blows heat while other blows cold, Intermittent fan speed control, works only on high

Fix: Servo motors seize and plastic gears in programmer unit strip. Dash removal required for full access—12-15 hours. Servo motors available via specialists; programmer rebuild services exist but require sending unit out (2-week turnaround typical). Some techs rig manual cable overrides as temporary fix.

Estimated cost: $1,800-3,800

Symptoms: Intermittent no-start, cranks but won't fire, Random misfires that move between cylinders, Check engine light with multiple implausible sensor codes, Brittle, cracked insulation on underhood wiring, especially near exhaust

Fix: Heat and age make factory wiring brittle; insulation cracks and shorts occur. Main harness replacement requires 10-14 hours and specialized Rolls/Bentley connectors. Many shops repair individual circuits as failures occur (2-4 hours per section), but eventually full harness becomes cost-effective.

Estimated cost: $1,200-4,500