1990 DODGE RAIDER

Typical onset: 80,000-150,000 mi

Symptoms: Rod knock or metallic rattling from bottom end, especially cold starts, Low oil pressure warning light flickering at idle, Metal shavings in oil during changes, Sudden seizure after extended highway driving or towing

Fix: The 3.0L SOHC Mitsubishi V6 has inadequate oiling to #1 and #6 rod bearings, causing spun bearings and destroyed cranks. Requires complete engine rebuild or junkyard replacement. Rebuild involves full teardown, crank machining/replacement, new bearings, rings, and typically both head gaskets while it's apart. 25-35 labor hours for rebuild, 12-16 hours for used engine swap.

Estimated cost: $3,500-6,500

Typical onset: 70,000-120,000 mi

Symptoms: Pink or brown frothy fluid in radiator or coolant reservoir, Transmission slipping or delayed engagement after warmup, Overheating engine and transmission simultaneously, Coolant level dropping with no visible external leaks

Fix: The transmission cooler integrated into the radiator fails internally, mixing ATF and coolant. Requires immediate radiator replacement, complete transmission flush (multiple times), new trans filter, and often transmission rebuild if caught late because coolant destroys clutch packs. Must replace both radiator and flush before driving. 8-12 hours if trans survives, 18-25 hours if rebuild needed.

Estimated cost: $1,200-4,800

Typical onset: 60,000-100,000 mi

Symptoms: Severe clunking when shifting from Park to Drive or Reverse, Vibration at highway speeds that wasn't there before, Visible sagging of transmission tailhousing, Shifter feels loose or moves excessively during acceleration

Fix: Rubber mounts deteriorate from heat and oil contamination, allowing excessive drivetrain movement that damages exhaust hangers, driveshafts, and shift linkage. Requires replacing transmission mount, crossmember mount, and transfer case mount as a set. Access requires dropping exhaust and supporting drivetrain. 3-5 labor hours.

Estimated cost: $400-750

Typical onset: 90,000-140,000 mi

Symptoms: White smoke from exhaust on cold starts that persists, Coolant consumption with no visible leaks, Rough idle or misfires that move between cylinders, Bubbling in coolant reservoir when engine running, Oil that looks like chocolate milk on dipstick

Fix: The 3.0L V6 head gaskets fail from age and repeated heat cycling, often both banks simultaneously. Requires removing intake manifold, exhaust manifolds, both heads, resurfacing heads, new gaskets, timing belt replacement while accessible, new coolant, and valve cover gaskets. Should also replace valve stem seals if heads are off. 14-18 labor hours for both sides.

Estimated cost: $2,200-3,800

Symptoms: Hard starting after sitting overnight, especially in cold weather, Stumbling or surging during acceleration, Stalling at idle when fuel tank below quarter-full, Loss of power on hills or when climbing grades

Fix: Ethanol fuel degrades rubber fuel lines from inside-out, depositing varnish that clogs the in-tank screen and inline fuel filter. Filter is frame-mounted and often seized from rust. Requires replacing filter, checking tank pickup screen, sometimes replacing fuel pump if contamination is severe. 1.5-3 hours depending on rust conditions and whether tank needs dropping.

Estimated cost: $200-650

Typical onset: 100,000-180,000 mi

Symptoms: Deep rumbling or growling noise from engine bottom end, Oil pressure drops significantly when hot, Vibration that increases with RPM, Metal particles large enough to see in oil filter media

Fix: Even without catastrophic failure, the 3.0L develops excessive crank and main bearing clearances from marginal oiling design. Requires complete engine teardown, crank removal, measuring journals, machining crank undersize if possible, or replacement crank from Japan. New main bearings, rear main seal, and reassembly. 22-30 labor hours minimum, often combined with full rebuild.

Estimated cost: $3,800-6,000