2000 PORSCHE 718 BOXSTER S

Typical onset: 40,000-80,000 mi

Symptoms: metallic rattling from engine bay at startup, metal shavings in oil during changes, sudden catastrophic engine failure with no prior warning, check engine light with cam/crank correlation codes

Fix: Requires engine removal, rear main seal area access, IMS bearing replacement with upgraded unit. Preventive replacement takes 12-16 hours labor. Post-failure means full engine rebuild or replacement adding pistons, bearings, machine work—easily 40-60 hours total.

Estimated cost: $2,500-4,500 preventive, $12,000-18,000 post-failure rebuild

Typical onset: 60,000-100,000 mi

Symptoms: excessive oil consumption (1 quart per 500-1000 miles), blue smoke on startup or acceleration, rough idle and misfires, loss of compression in affected cylinders, metal debris in oil

Fix: M96 engines develop vertical scoring in cylinder walls from debris or poor oiling. Requires complete engine teardown, bore inspection, cylinder sleeving or replacement, new pistons/rings, bearings. Engine-out rebuild: 35-50 hours labor plus machine shop work.

Estimated cost: $10,000-16,000

Typical onset: 50,000-90,000 mi

Symptoms: oil pooling under car after parking, oil spots on driveway centered under engine/trans junction, low oil level warnings, visible oil seepage at engine-transmission bell housing

Fix: Transmission must come out to access rear main seal. Often done simultaneously with IMS bearing service since access is identical. Transmission removal and seal replacement: 10-14 hours labor.

Estimated cost: $1,800-3,200

Typical onset: 80,000-120,000 mi

Symptoms: coolant smell in cabin or engine bay, visible coolant leaks under vehicle, overheating warnings, low coolant light illuminated, cracked plastic tank visible on inspection

Fix: Plastic expansion tank cracks from age/heat cycles; coolant hoses become brittle. Tank replacement is straightforward (2-3 hours), but multiple hoses may need simultaneous replacement requiring more disassembly.

Estimated cost: $400-900

Typical onset: 70,000-110,000 mi

Symptoms: transmission fluid leaking from front/center of car, transmission slipping or delayed engagement when fluid low, burning smell, visible fluid on transmission bell housing area

Fix: Cooler lines crack or fittings fail from heat/vibration; transmission mounts collapse causing drivetrain misalignment. Cooler line replacement: 3-5 hours. Mount replacement adds 2-4 hours depending on which mounts.

Estimated cost: $600-1,400

Typical onset: 80,000-130,000 mi

Symptoms: rough running under load, hesitation or stumbling during acceleration, difficulty starting when hot, check engine light with fuel trim codes, engine stalling at idle

Fix: In-tank fuel filter/pump assembly gets clogged or pump motor fails. Requires fuel tank drop or rear access panel removal. Pump/filter replacement: 4-6 hours labor.

Estimated cost: $800-1,400