2012 PORSCHE 718 CAYMAN

Typical onset: 60,000-100,000 mi

Symptoms: metal shavings in oil, rattling noise from engine on cold start, sudden loss of oil pressure, check engine light with cam/crank correlation codes, catastrophic engine seizure with no warning

Fix: The intermediate shaft bearing can fail, dropping metal debris into the engine and destroying internals. Prevention requires IMS bearing retrofit (8-12 hours labor, engine-out preferred). Once failed, you're looking at full engine rebuild or replacement—short block, pistons, bearings, machine work (60-80 hours labor). Many owners do IMS upgrade proactively during clutch jobs.

Estimated cost: $8,000-15,000

Typical onset: 80,000-120,000 mi

Symptoms: excessive oil consumption (1 qt per 1,000 mi or more), blue smoke on cold start or deceleration, loss of compression, rough idle, metallic knocking under load

Fix: M97 engines with Lokasil cylinder liners can develop scoring from insufficient lubrication during cold starts or break-in abuse. Requires bore inspection via borescope, then full tear-down: pistons, rings, machine work or cylinder sleeving, reassembly (50-70 hours). Some shops recommend Nikasil re-plating or aftermarket sleeves. Often combined with IMS bearing replacement while engine is apart.

Estimated cost: $12,000-18,000

Typical onset: 70,000-110,000 mi

Symptoms: transmission fluid spots under car, low fluid warning on PDK models, burnt transmission smell, hard shifts or slipping on manual transmissions after fluid loss

Fix: Metal hard lines from transmission to cooler develop corrosion and crack at bends or connections. Replace both cooler lines and inspect cooler itself (2-4 hours labor). Left unaddressed, low fluid destroys the transmission.

Estimated cost: $600-1,200

Typical onset: 60,000-100,000 mi

Symptoms: excessive drivetrain clunk on shifts or throttle tip-in, vibration through cabin at idle, shifter slop or vague engagement, visible tearing or fluid leakage from mount

Fix: Rubber mounts fail from age and heat. Requires lift, transmission support, and R&R of mount (2-3 hours labor). Both front and rear mounts should be inspected; often replaced as a pair.

Estimated cost: $500-900

Typical onset: 80,000-120,000 mi

Symptoms: oil pooling at transmission bellhousing, oil spots under rear of car, clutch contamination leading to slip (manual trans), oil smell from engine bay

Fix: Rear main seal hardens and leaks over time. Requires transmission removal (8-12 hours labor for manual, 10-14 for PDK). Often done during clutch replacement to save labor overlap. Small leaks can be monitored; major leaks destroy clutches.

Estimated cost: $1,800-3,200

Typical onset: 60,000-90,000 mi

Symptoms: coolant smell from engine bay, low coolant warning, visible coolant residue on tank or hoses, overheating in extreme cases

Fix: Plastic expansion tank and rubber coolant hoses become brittle with heat cycling. Replace tank, cap, and suspect hoses proactively (1.5-2.5 hours labor). Inexpensive and prevents being stranded.

Estimated cost: $400-700