1970 PLYMOUTH FURY

Typical onset: 80,000-120,000 mi

Symptoms: Rattling noise from front of engine on cold start that fades as oil pressure builds, Difficulty starting when hot, backfiring through carburetor, Loss of power and rough idle as timing retards, Check timing with light—if it jumps around erratically, chain is stretched

Fix: Replace timing chain, gears, and tensioner. On 318/360 engines this is a 4-5 hour job; big-blocks (383/440) run 5-6 hours due to tighter engine bay. Must set timing marks precisely. Smart shops replace water pump and front seal while they're in there.

Estimated cost: $600-1,200

Symptoms: Front end sags on one or both sides even with good shocks, Clunking from lower control arm area over bumps, Rust visible on torsion bar hex ends or anchor crossmember, Uneven ride height side-to-side that can't be adjusted out

Fix: The torsion bar anchors rust through on the frame rails, especially in salt states. If caught early, you can sleeve and reinforce (3-4 hours per side). If the crossmember is compromised, you're looking at major frame repair or replacement crossmember fabrication (12-20 hours). This is THE structural killer on these cars.

Estimated cost: $800-3,500

Symptoms: Hard starting, especially when warm, Flooding, gas smell, black smoke from exhaust, Hesitation on acceleration, flat spots, Rough idle that varies with engine temperature

Fix: 50-year-old carburetors need full rebuilds—dried out gaskets, warped throttle shafts, stuck choke mechanisms. Rebuild kits run $40-80, job takes 2-3 hours if done on bench. Many owners swap to Edelbrock or Holley replacements ($300-500) which bolt on and eliminate most headaches. Include distributor tune-up at same time.

Estimated cost: $250-800

Symptoms: Visible rust perforation at radiator support lower corners, Front end feels loose or wanders despite fresh alignment, Cracking paint or bubbling around inner fender/firewall junction, Control arm mount areas show surface rust or scaling

Fix: The front subframe (K-member area) and radiator support rot from the inside out, especially where closed sections trap moisture. Patch repair is 8-12 hours if metal is available; full radiator support replacement is 15-20 hours including disassembly. Unibody rust here compromises crash structure—not cosmetic.

Estimated cost: $1,500-4,000

Symptoms: Intermittent no-start, no dash lights, or complete electrical failure, Burning smell from firewall area or under dash, Ammeter gauge swings wildly or pegs in one direction, Headlights dim significantly at idle, Melted or discolored bulkhead connector on firewall

Fix: The firewall bulkhead connector corrodes internally and creates high resistance, generating heat that melts terminals. All charging current flows through the ammeter which can fail catastrophically. Proper fix: bypass ammeter to voltmeter conversion (2 hours), clean or replace bulkhead connector (1-2 hours), check alternator output and wiring. Half-measures lead to electrical fires.

Estimated cost: $300-700

Typical onset: 60,000-90,000 mi

Symptoms: Steering wander and poor returnability after turns, Clunking over bumps from front suspension, Tire wear on inside or outside edges, Loose feeling in steering wheel with play before wheels respond

Fix: The rubber bushings in upper control arms dry-rot and the ball joints wear. Upper ball joints are riveted in—drill out and bolt in replacements (3-4 hours per side with alignment). Bushings require pressing (add 1 hour). Most shops do both sides at once. Alignment mandatory afterward.

Estimated cost: $600-1,100

Symptoms: Fuel gauge reads empty when tank is full, or stuck at one reading, Fuel smell from rear of car, visible wetness around filler neck, Fuel starvation or stumbling despite gauge showing fuel, Rust flakes in fuel filter after tank service

Fix: Sending units fail from ethanol-degraded floats and corroded contacts. Replacement sending unit is 2-3 hours (drop tank, R&R). If tank is rusty inside, needs removal, cleaning/sealing or replacement (add 1-2 hours). Inspect all rubber fuel lines—they're 50+ years old. Steel lines rust through at rear frame area.

Estimated cost: $400-900