2008 PORSCHE 718 BOXSTER

Typical onset: 60,000-100,000 mi

Symptoms: metallic rattling from engine on cold start, metal shavings in oil filter or drain plug, catastrophic engine failure without warning in worst cases

Fix: Requires engine removal, rear main seal area access, IMS bearing replacement with upgraded solution (LN Engineering or similar). Often done during clutch replacement to save labor. 16-20 hours labor if done standalone, 20-24 hours combined with clutch.

Estimated cost: $3,500-6,000

Typical onset: 80,000-120,000 mi

Symptoms: excessive oil consumption (1qt per 500-1000 miles), blue smoke on startup or deceleration, rough idle and misfires, low compression on borescope inspection

Fix: No Band-Aid fix exists. Requires engine rebuild with new Lokasil-coated cylinders or complete engine replacement. Nikasil cylinder failures tied to direct metal-to-metal contact from insufficient lubrication. 40-50 hours for rebuild, less if you source a used engine.

Estimated cost: $12,000-18,000

Typical onset: 70,000-110,000 mi

Symptoms: oil pooling under engine after parking, oil drips visible at bellhousing area, oil consumption without visible external leaks elsewhere

Fix: Engine and transmission must be separated to access seal. Often bundled with IMS bearing service and clutch replacement to justify the labor. 14-18 hours standalone.

Estimated cost: $2,200-3,500

Typical onset: 60,000-90,000 mi

Symptoms: coolant smell in cabin or trunk area, visible coolant leaks near right side of engine bay, overheating under load, low coolant warning light

Fix: Plastic expansion tank cracks, hoses become brittle. Replace tank, all coolant hoses, and thermostat as preventive measure. 3-5 hours labor depending on access.

Estimated cost: $800-1,400

Typical onset: 50,000-80,000 mi

Symptoms: excessive oil consumption without visible leaks, white smoke from exhaust, rough idle, oil in intake tubes or throttle body

Fix: AOS diaphragm fails, allowing crankcase pressure to push oil into intake. Replace AOS unit, clean intake system. 4-6 hours labor, relatively straightforward.

Estimated cost: $1,000-1,600

Typical onset: 80,000-120,000 mi

Symptoms: top operates slowly or stops mid-cycle, hydraulic fluid visible in trunk area near top mechanism, warning light for top malfunction

Fix: Hydraulic lines and cylinder seals age out. Diagnose specific leak point, replace lines or cylinders. Can be 2-6 hours depending on which component failed.

Estimated cost: $600-2,000