1966 PLYMOUTH FURY

Typical onset: 80,000-120,000 mi

Symptoms: Rattling noise from front of engine on cold start that quiets as oil pressure builds, Erratic timing, hard starting, rough idle, Loss of power, backfiring through carburetor, Check timing with light—if it jumps around, chain is likely stretched

Fix: Replace timing chain, gears, and tensioner. Requires removing radiator, water pump, harmonic balancer, and timing cover. Expect 6-8 hours labor for experienced tech; add time if you find worn cam gear or need to degree the cam. Use double-roller chain kit for longevity.

Estimated cost: $450-850

Symptoms: Fuel smell in engine bay, visible drips from carb base or bowl gaskets, Hard starting when hot, flooding with fuel puddles on intake, Black smoke, rich running, gas dripping into intake after shutdown, Fire hazard—fuel on hot manifold is dangerous

Fix: Rebuild carburetor with new gaskets, needle/seat, accelerator pump, and float adjustment. Most techs pull carb, bench rebuild in 2-3 hours including adjustment time. If base is warped or throttle shafts worn, replace carb ($300-600 for correct AFB/AVS). Check fuel pump pressure—should be 4-6 psi; higher pressure overwhelms needle/seat.

Estimated cost: $250-700

Symptoms: Running hot in traffic, especially with 383/440 and A/C, Temperature gauge climbing past halfway mark on warm days, Boil-over after shutdown, coolant loss with no visible leaks, Heater performance drops when engine temperature rises—air lock

Fix: Start with basics: flush system, new 180°F thermostat, check water pump impeller (original cast-iron pumps corrode internally). Upgrade to high-flow water pump, verify fan clutch or add shroud if missing. Big-blocks need 4-row radiator; many cars came with 2-row. Re-core or replace radiator (4-5 hours with A/C lines). Check timing—over-advanced causes heat.

Estimated cost: $600-1,400

Typical onset: 70,000-110,000 mi

Symptoms: Clunking over bumps from front suspension, Wandering steering, car doesn't track straight, Uneven tire wear on inside edges, Front end sags on one or both sides despite torsion bar adjustment

Fix: Inspect lower control arm pivot bushings and strut rod bushings—rubber deteriorates after 50+ years. Replace bushings (requires press or torch for original rubber) or upgrade to polyurethane. Check torsion bar adjusters for seized bolts. Alignment mandatory after. 4-6 hours per side if you're replacing bushings. Many cars also need ball joints at this mileage.

Estimated cost: $700-1,200

Symptoms: Intermittent electrical issues: gauges cut out, headlights dim, accessories fail, Burning smell near firewall, melted connector plastic at bulkhead, Voltage drop across bulkhead—measure 12V at battery, 10V at fuse box, Ammeter needle swings wildly or pegs left

Fix: Inspect bulkhead connector terminals for corrosion, heat damage, or loose pins. Clean and re-tension terminals, apply dielectric grease. If badly melted, source replacement bulkhead connector or rewire problem circuits. Check ammeter terminals inside dash—common failure point causing heat. 3-5 hours to properly diagnose and repair.

Estimated cost: $200-600

Typical onset: 90,000-140,000 mi

Symptoms: Gear oil drips on inside of rear wheel/brake drum, Whirring or howling noise from rear that changes with speed, Oil-soaked rear brake shoes, reduced braking on one side, Visible oil accumulation on differential cover or axle tubes

Fix: Replace axle seals and inspect bearings. If bearings are pitted or grooved, replace—Mopar used tapered roller bearings on most. Requires axle shaft removal (C-clip style on most 8.75" and 9.25" rears). Also check pinion seal and cover gasket. 2-3 hours per side for seals, 4-5 hours if replacing bearings and setting preload.

Estimated cost: $300-700