The 1967 Plymouth Belvedere is a solid B-body Mopar with typical 1960s build quality—robust chassis, simple mechanicals, but age-related deterioration is now the primary enemy. Most common issues stem from 55+ years of existence rather than original design flaws.
Timing Chain Stretch and Wear (V8 Engines)
Common · medium severityTypical onset: 80,000-120,000 mi original, or any mileage if unknown history
Symptoms: Hard starting when engine is hot, Backfiring through carburetor, Rough idle and loss of power, Rattling noise from timing cover on startup, Ignition timing won't stay adjusted
Fix: Replace timing chain, gears, and tensioner. Requires pulling radiator, water pump, harmonic balancer, and timing cover. While you're in there, replace the fuel pump eccentric and oil slinger. 6-8 hours labor for experienced tech, longer if stuck bolts or corroded components are encountered.
Estimated cost: $800-1,400
Torsion Bar Anchor Corrosion and Failure
Occasional · high severitySymptoms: Front end sags on one or both sides, Clunking from front suspension over bumps, Uneven ride height that adjusting bolts won't fix, Visible rust perforation at lower control arm anchor points
Fix: The torsion bar anchors in the lower control arm crossmember rust through, especially in salt-belt cars. Requires complete front suspension disassembly, crossmember removal, and often welding in repair sections or replacing the entire K-member. 12-16 hours labor if welding and fabrication required. Cannot be safely driven if anchor is compromised.
Estimated cost: $1,800-3,500
Single-Reservoir Master Cylinder Failure
Occasional · high severitySymptoms: Complete brake pedal loss with no warning, Brake fluid leak at master cylinder, Pedal goes to floor, Spongy pedal that doesn't improve with bleeding
Fix: Original single-reservoir master cylinders are 55+ years old and fail without warning—internal seals let go and you lose all braking. Immediate replacement required. Most techs upgrade to dual-reservoir master from 1968+ B-body for safety (requires proportioning valve and line modifications). Single-reservoir rebuild: 2-3 hours. Dual upgrade: 4-6 hours with line work.
Estimated cost: $400-900
Floor Pan and Torque Box Rust-Through
Common · medium severitySymptoms: Visible holes in driver/passenger floor pans, Rust perforation around rear spring hangers, Frame rail torque boxes crumbling near rear leaf spring mounts, Exhaust fumes entering cabin, Floor feels spongy when walking on it
Fix: Floor pans rust from inside-out due to trapped moisture and undercoating that holds water. Torque boxes (structural reinforcement at frame/body junction) rust and collapse, compromising chassis rigidity. Repair requires cutting out rust, welding in patch panels or complete floor pan replacements. DIY-friendly but time-consuming: 20-40 hours depending on extent. Professional bodywork gets expensive fast.
Estimated cost: $2,500-6,000
Carburetor Fuel Leaks and Percolation (Carter BBD and AFB)
Common · low severitySymptoms: Gas smell after shutdown, Hard starting when hot (vapor lock), Fuel dripping from carburetor base or bowl seals, Engine flooding after sitting in hot weather, Rough running until engine cools
Fix: Original Carter carburetors have aged gaskets and ethanol-damaged internal components. Heat from modern fuel causes vapor lock and percolation. Rebuild kit installation: 3-4 hours including cleaning and tuning. Consider heat insulator gasket under carb and electric fuel pump with return line for modern fuel compatibility.
Estimated cost: $350-700
Drum Brake Self-Adjuster Seizure
Common · medium severitySymptoms: Excessive brake pedal travel requiring multiple pumps, Uneven braking side-to-side, Parking brake won't hold on incline, Brake shoes don't return to proper position after adjustment attempt
Fix: Self-adjusting mechanisms on all four drums seize from corrosion and lack of use. Cables freeze, star wheels won't turn, and shoes wear unevenly. Requires complete drum brake service all four corners: disassembly, cleaning, lubrication of adjuster mechanisms, new hardware kit, and shoes if worn. 4-6 hours for all four wheels.
Estimated cost: $600-1,000
Steering Box Excessive Play and Leaks
Occasional · medium severityTypical onset: 90,000+ mi original, or any age from wear
Symptoms: Excessive steering wheel free-play (more than 2 inches), Wandering on highway requiring constant correction, Power steering fluid leak at sector shaft seal, Clunking when turning wheel back and forth, Groaning noise when turning at low speed
Fix: Chrysler recirculating-ball steering boxes wear internally, and sector shaft seals leak. Adjustment can take up some play temporarily, but worn boxes need rebuilding or replacement. Remove/install: 3-4 hours. Rebuild requires specialized tools and experience. Most shops install remanufactured unit. Requires alignment after.
Estimated cost: $500-900
Buy one if rust-free and you can wrench—mechanicals are simple and parts available, but rot will bankrupt you and 55-year-old safety systems need immediate upgrades.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.