The first-gen Eclipse (1990-1994 platform) is a fun DSM chassis built alongside the Talon and Laser, sharing components and weaknesses. The 4G37 1.8L is gutless but reliable; the 4G63 2.0L turbo is a tuner favorite but notorious for crankwalk and oiling issues when abused or poorly maintained.
Crankshaft Thrust Bearing Failure ("Crankwalk") — 4G63 Turbo
Common · high severityTypical onset: 80,000-150,000 mi
Symptoms: Metallic grinding or knocking from bottom end, especially when clutch is depressed, Clutch engagement point changes over time (pedal feel shifts), Excessive end-play detected with dial gauge on crank pulley, Eventually: catastrophic bottom-end failure, oil starvation, rod knock
Fix: Engine teardown and crankshaft replacement; usually go with a forged crank and ACL race bearings while you're in there. 16-24 labor hours depending on whether you pull the engine. Often triggers a full rebuild since you're already apart.
Estimated cost: $3,500-6,500
Automatic Transmission Failure (F4A33 / KM177)
Common · high severityTypical onset: 90,000-130,000 mi
Symptoms: Slipping between gears, especially 2nd-3rd shift, Burnt ATF smell, dark or metallic fluid, Delayed or harsh engagement from Park to Drive, Complete loss of forward gears; limp mode or stuck in 2nd
Fix: The F4A33 auto is fragile, especially behind the turbo. Rebuild kits exist but most shops recommend used/reman unit swap due to age of vehicle. 8-12 hours labor for R&R plus rebuild or replacement unit cost.
Estimated cost: $1,800-3,200
Head Gasket Failure — 4G63 Turbo
Occasional · high severityTypical onset: 100,000-140,000 mi
Symptoms: White smoke from exhaust, especially on cold start, Coolant loss with no visible leaks; bubbles in overflow tank, Overheating under boost or highway driving, Oil-in-coolant or coolant-in-oil (milky dipstick or cap)
Fix: Multi-layer steel (MLS) gasket and ARP head studs are the correct fix; OEM composite gaskets fail again. Requires head resurfacing. 10-14 hours labor. Check for warped head; budget for machine work.
Estimated cost: $1,500-2,800
Transmission and Engine Mount Deterioration
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Excessive drivetrain clunk on throttle lift or engagement, Shifter slop, hard to find gears (manual), Vibration at idle, especially with A/C on, Engine rocks visibly under hard acceleration
Fix: Replace all engine/trans mounts as a set; OEM rubber is long gone by now. Polyurethane aftermarket mounts are stiffer but last. 3-5 hours labor for full set (front, rear, trans, passenger side).
Estimated cost: $400-750
Fuel Pump and Filter Clogging
Occasional · medium severityTypical onset: 80,000-120,000 mi
Symptoms: Fuel starvation under boost or high-speed pulls, Engine stumbles or cuts out above 4,500 RPM, Long crank times, hard starting when hot, Lean AFR readings, potential detonation on boosted cars
Fix: In-tank pump replacement and inline filter change. Pump access is easier on AWD models (hatch removal); FWD requires tank drop. 2-4 hours labor. Use OEM or Walbro 255 if modded.
Estimated cost: $350-650
Electrical Wiring Harness Degradation
Occasional · medium severitySymptoms: Intermittent no-start, no crank, Gauges flicker or drop out; tach stops working, Radiator fan stays on or won't turn on, Check Engine Light with MAF, TPS, or O2 sensor codes that don't resolve with part replacement
Fix: Early 90s Mitsubishi wiring insulation gets brittle. Common failure points: engine harness near exhaust manifold, chassis grounds, ECU connector pins. Diagnosis can eat hours; repair is trace-and-splice or harness replacement. 4-8 hours labor depending on extent.
Estimated cost: $400-1,200
Pop-Up Headlight Pivot Gear Failure
Occasional · low severitySymptoms: One or both headlights won't pop up or retract fully, Grinding noise from headlight motors, Lights stuck in up or down position, Manual crank still works but motor doesn't
Fix: Plastic pivot gears strip over time; replacement gears available aftermarket. Motor removal and reinstall per side. 1-2 hours labor per light assembly.
Estimated cost: $150-300
Buy a manual trans car with service records and low owner count; avoid automatics and any turbo car with unknown maintenance history — you're looking at a $4k-6k engine rebuild lottery ticket.
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.