The 2024 718 Cayman GTS with the 4.0L naturally-aspirated flat-six is essentially a carryover of the GT4 engine architecture introduced in 2020. While dramatically more reliable than the earlier 2.5L/2.0L turbo four-cylinders, the 9A2 Evo flat-six still carries IMS-successor concerns and requires vigilant maintenance—especially oil-related.
Cylinder Scoring / Bore Wear (9A2 Evo Engine)
Occasional · high severityTypical onset: 40,000-80,000 mi
Symptoms: Excessive oil consumption (more than 1 qt per 1,000 mi), Cold-start smoke from exhaust (blue-gray), Loss of compression on borescope inspection, Metallic particles in oil analysis
Fix: Complete engine teardown, cylinder boring/sleeving or block replacement, new pistons and rings. 35-50 labor hours depending on machine shop work. Some engines qualify for Porsche goodwill assistance if documented oil changes exist.
Estimated cost: $18,000-28,000
Transmission Oil Cooler Line Leaks (PDK)
Common · medium severityTypical onset: 30,000-60,000 mi
Symptoms: Transmission fluid pooling under vehicle near bellhousing area, Burnt transmission fluid smell during spirited driving, PDK fluid level warning on dash (rare, usually caught visually first), Shifting hesitation or slipping in higher gears under load
Fix: Replace failed oil cooler lines and top off PDK fluid. Often the quick-disconnect fittings corrode or the rubber hoses crack at stress points. 3-5 hours labor including proper fluid refill procedure.
Estimated cost: $800-1,400
Transmission Mount Failure (PDK and Manual)
Occasional · medium severityTypical onset: 50,000-90,000 mi
Symptoms: Clunking noise during throttle tip-in or aggressive shifts, Excessive drivetrain movement felt through cabin on launch, Visible tearing or separation of rubber from metal on inspection, Vibration at idle that worsens with climate control load
Fix: Replace transmission mount assembly. Access requires partial exhaust removal and supporting transmission. 2.5-4 hours labor. Aftermarket polyurethane options available but increase NVH.
Estimated cost: $600-1,100
Fuel Filter Clogging (Ethanol-Related)
Occasional · medium severitySymptoms: Hard starting after sitting multiple days, Intermittent stumble or misfire at WOT above 6,000 RPM, Fuel pressure fluctuation on scan tool (target 58 psi, drops to 45-50 psi), Check engine light with lean fuel trim codes (P0171/P0174)
Fix: Replace in-tank fuel pump/filter assembly. Tank must be dropped. Common in regions with higher ethanol content or cars that sit frequently. 4-6 hours labor.
Estimated cost: $1,200-1,800
PASM Damper Failure
Occasional · low severityTypical onset: 60,000-100,000 mi
Symptoms: PASM fault warning on dash, Suspension stuck in one mode (usually comfort), Knocking noise over bumps from specific corner, Uneven ride height side-to-side, Fluid weeping from damper body
Fix: Replace failed electronic damper(s). These are not rebuildable. Each corner is 2-3 hours labor. Often just one damper fails but inspect all four for leaks.
Estimated cost: $1,800-2,400 per damper
Coolant Expansion Tank Cracking
Rare · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Coolant smell in cabin or near rear trunk area, Visible coolant staining on expansion tank or surrounding components, Low coolant warning intermittently on dash, Small puddles of coolant under rear of car after spirited driving
Fix: Replace expansion tank and pressure test system. Tank plastic becomes brittle with heat cycling. 2-3 hours labor including coolant flush.
Estimated cost: $500-900
Buy with eyes open—budget $2,000/year maintenance cushion beyond basics and demand oil consumption records; the 4.0L is fantastic when healthy but grenades expensively when neglected.
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.