1990 MITSUBISHI GALANT

Typical onset: 90,000-140,000 mi

Symptoms: Delayed engagement into Drive or Reverse, Slipping between 2nd and 3rd gears under load, Transmission fluid mixing with coolant (strawberry milkshake fluid), Hard or erratic shifts, especially when cold

Fix: The internal oil cooler in the radiator fails and cross-contaminates coolant and ATF, destroying the transmission if not caught early. Radiator replacement (2 hrs) plus full trans flush might save it if caught immediately, but most need a rebuild or used trans swap (8-12 hrs labor). This is the NHTSA-recalled component and it kills more transmissions than any internal defect.

Estimated cost: $1,800-3,500

Typical onset: 120,000-180,000 mi

Symptoms: Blue smoke on startup and acceleration, Burning a quart of oil every 500-800 miles, Fouled spark plugs, Loss of power and rough idle

Fix: The 2.0L SOHC develops ring wear and cylinder glazing, especially if oil changes were neglected. You're looking at piston ring replacement with cylinder honing at minimum (12-16 hrs), but many need full bottom-end work (pistons, bearings, crank polish) or short block swap (18-24 hrs). Head gasket replacement is often done simultaneously since you're that far in.

Estimated cost: $2,200-4,800

Typical onset: 140,000-200,000 mi

Symptoms: Deep knocking noise from bottom of engine, rpm-dependent, Metallic rattling that worsens under load, Sudden loss of oil pressure, Metal shavings in oil pan

Fix: Caused by oil starvation from consumption issues or neglected changes. Requires full crank R&R with machine work (polish or undersize bearings) at 20-26 hrs labor, or short block replacement (18-22 hrs). These engines can't tolerate low oil levels even briefly. If the crank is scored beyond .010" undersize, you're hunting junkyards.

Estimated cost: $3,200-5,500

Typical onset: 60,000-100,000 mi

Symptoms: Stumbling or hesitation during acceleration, Hard starting, especially after sitting, Stalling at idle after warm-up, Loss of power at highway speeds

Fix: The inline fuel filter clogs from tank sediment and old gas varnish, starving the injection system. Filter is under the car near the tank, 0.5-1 hr job, but many neglect it because it's not in the service manual interval clearly. If ignored, it kills the fuel pump prematurely ($400-700 job). Replace every 30k miles preventively.

Estimated cost: $80-150

Typical onset: 80,000-120,000 mi

Symptoms: Clunking when shifting from Park to Drive, Excessive engine movement visible from outside during acceleration, Vibration through shifter and floorboard, Transmission tunnel heat increase

Fix: The rear transmission mount deteriorates and lets the trans sag, causing driveline vibration and stress on the halfshafts. It's a 1.5-2 hr job to replace the mount, straightforward with a trans jack. OEM mounts last, aftermarket poly mounts transmit more NVH but last longer.

Estimated cost: $180-320

Typical onset: 110,000-160,000 mi

Symptoms: White smoke from exhaust, sweet smell, Coolant loss with no visible leaks, Overheating under load, Oil cap shows milky residue

Fix: Not epidemic like some platforms, but the SOHC head gasket can fail from overheating events or age. Head gasket job is 8-10 hrs, but you should do timing belt, water pump, and valve seals while you're in there (adds 2 hrs and $300 parts). Check for head warpage; if decking is needed, add $150-250 machine work.

Estimated cost: $1,200-2,100