The '97 Legacy GT with the EJ25D turbocharged boxer is a capable platform plagued by well-documented head gasket failures and ring-land weaknesses that can escalate to catastrophic engine damage if boost is turned up or maintenance is neglected.
Head Gasket Failure (External Leaks)
Common · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Oil seepage at cylinder head-to-block seam, Coolant weeping from same area, Slight oil consumption, No overheating initially
Fix: Pull engine or do in-chassis if you hate yourself. Replace both gaskets, resurface heads if warped, new timing components while you're there. 12-16 hours labor if engine stays in, 10-12 if pulled.
Estimated cost: $1,800-2,800
Piston Ring-Land Failure
Occasional · high severityTypical onset: 80,000-130,000 mi
Symptoms: Sudden excessive oil consumption, Blue smoke on acceleration, Misfire on one cylinder, Loss of compression, Metallic debris in oil
Fix: Ring-lands crack between the top two piston rings, usually #4 cylinder. Requires full short-block replacement or engine rebuild with forged pistons if owner wants to keep it. 18-24 hours labor for swap.
Estimated cost: $3,500-6,000
Turbo Oil Feed Line Clogging
Common · high severityTypical onset: 90,000-140,000 mi
Symptoms: Turbo whine or whistle changes pitch, Loss of boost pressure, Blue smoke from exhaust, Check engine light for lean codes
Fix: Banjo bolt filter screens clog with sludge, starve turbo bearing. Replace lines, banjo bolts, and often the turbo itself if oil starvation damage occurred. 4-6 hours labor for turbo replacement.
Estimated cost: $1,200-2,200
Transmission Oil Cooler Line Leaks
Common · medium severityTypical onset: 120,000-180,000 mi
Symptoms: ATF puddles under car, Transmission slipping when hot, Low fluid level on dipstick, Burnt ATF smell
Fix: Steel lines rust through at bends or crimp fittings. Replace both lines and top off fluid. 2-3 hours labor. Check radiator-mounted cooler for cross-contamination if coolant in ATF.
Estimated cost: $300-600
Transmission Mount Collapse
Common · low severityTypical onset: 100,000-160,000 mi
Symptoms: Clunk on 1-2 or 2-3 shift, Vibration at idle in Drive, Shifter feels loose or notchy, Driveline thud on throttle application
Fix: Rear transmission mount (pitch stopper) rubber deteriorates. Replace mount. 1.5-2 hours labor. Do all three mounts if budget allows.
Estimated cost: $200-400
Fuel Filter Clogging / Pump Weakening
Occasional · medium severityTypical onset: 100,000+ mi
Symptoms: Hesitation under boost, Lean codes (P0171/P0174), Stumble during highway passing, Won't hold fuel pressure above 3,000 RPM
Fix: In-tank filter sock clogs or pump weakens. Drop tank, replace pump assembly and external filter. 3-4 hours labor.
Estimated cost: $400-700
Crankshaft Position Sensor Failure
Occasional · high severitySymptoms: No-start when hot, Stalling at idle after long drive, Crank but no spark, Restarts fine when cool
Fix: Sensor behind crank pulley fails when heat-soaked. Replace sensor. 1-1.5 hours labor. Cheap part, big inconvenience.
Estimated cost: $150-300
Buy only if head gaskets and turbo oil lines are documented as replaced, or if you're handy and budget $3k-5k for deferred engine work — the chassis is solid but the EJ25D turbo is a ticking time bomb.
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.