1972 DODGE MONACO

Typical onset: 80,000-150,000 mi

Symptoms: Rattling noise from front of engine on cold start that quiets after warmup, Difficulty starting when hot, backfiring through carburetor, Loss of power and poor fuel economy, Check timing and find it's jumped 8-12 degrees retarded even after adjustment

Fix: Requires timing cover removal, new chain/sprocket set, oil pan gasket typically leaks afterward so plan to replace. Expect 6-8 hours labor for timing chain job plus another 1-2 hours if oil pan needs resealing. Use double-roller chain kit if keeping long-term. Must set timing pointer accurately as many are off from factory.

Estimated cost: $600-1,200

Symptoms: Hard hot starts after sitting 15-30 minutes (heat soak), Fuel smell and overflow from carb vents in hot weather, Rough idle when fully warmed up, smooths out with choke partially engaged, Stalling at stop lights after highway driving

Fix: These C-bodies trap tremendous heat under the hood. Install carb heat shield/spacer, verify fuel line routing away from exhaust manifolds, check mechanical fuel pump for excessive pressure (should be 4-6 psi, many pump 7-8 psi when worn). Carburetor rebuild with ethanol-compatible kit takes 3-4 hours if experienced. Often need to add return line to tank for modern fuel.

Estimated cost: $400-800

Typical onset: 90,000-140,000 mi

Symptoms: Intermittent stalling and sputtering, worse when hot, Engine starves for fuel under acceleration then recovers, Fuel pressure drops below 3 psi or fluctuates wildly, Ticking noise from pump area, fuel weeping from pump body

Fix: The pushrod that actuates the pump wears a groove in itself and the cam eccentric. Always replace the pushrod when replacing pump—many techs skip this and have a comeback in 6 months. 1.5-2 hours labor, straightforward job but must check pushrod length and wear pattern. Consider electric pump conversion if originality not priority.

Estimated cost: $180-350

Symptoms: No-start when hot, starts fine cold (classic orange box failure), Sudden stalling while driving with no warning, Intermittent spark or weak spark at plugs, Ballast resistor physically cracked or showing heat discoloration

Fix: The early electronic ignition systems cook the control modules and ballast resistors. Carry spares of both—they're cheap insurance. Ballast resistor runs about $15 and 15 minutes, control module is $45-80 and 30 minutes. Many owners upgrade to later Mopar or aftermarket ignition boxes with better heat tolerance. Check all firewall connectors for corrosion while troubleshooting.

Estimated cost: $80-200

Typical onset: 100,000+ mi

Symptoms: Front end sits 2-3 inches lower than original height, Nose-dive on braking is excessive, Clunking from front suspension over bumps, Uneven tire wear on inside edges, Visible rust on torsion bar hex ends or anchor points

Fix: These heavy C-bodies sag badly with age. Often the adjusters are seized and anchors are rusted. If just sagged, clean and re-index torsion bars (2 hours labor). If anchors or bars corroded, need replacement bars and potentially frame repair—major job at 8-12 hours. Ball joints and bushings usually shot at this point too, so budget for complete front end refresh.

Estimated cost: $800-2,500

Symptoms: Transmission stays in lower gear too long, over-revs before shifting, Shifts too early and lugs engine under light throttle, Harsh 1-2 shift or delayed 2-3 shift, Linkage visibly loose or disconnected at carburetor or transmission

Fix: The Torqueflite kickdown linkage on these wore bushings and bent rods. Critical adjustment—wrong setting destroys clutches quickly. Inspect all pivot points and rod ends, replace worn bushings (common at bellcrank). Proper adjustment takes 1 hour if you know the procedure; most shops get it wrong. Factory service manual procedure is mandatory for longevity.

Estimated cost: $150-400