2016 PORSCHE 718 CAYMAN GTS

Typical onset: 40,000-80,000 mi

Symptoms: Cold-start smoke (blue or white) that clears after warm-up, Increased oil consumption (more than 1 qt per 1,000 mi), Rough idle when cold, cylinder misfires on startup, Metallic rattling from engine bay during cold operation, Visible scoring on cylinder walls during borescope inspection

Fix: Requires complete engine teardown with cylinder bore re-sleeving, new pistons, rings, bearings, and gaskets. Aftermarket solutions like Nickies sleeves or LN Engineering sleeves are common. Expect 35-45 hours labor for proper rebuild including removal/reinstallation, machine work outsourced separately.

Estimated cost: $15,000-25,000

Typical onset: 60,000-100,000 mi

Symptoms: Metallic grinding or whirring noise from engine bay that changes with RPM, Metal shavings in oil during oil changes, Check engine light with camshaft correlation codes, Catastrophic engine failure if bearing disintegrates completely

Fix: Engine must be removed for IMS bearing replacement. Many shops now perform this preventatively during bore scoring repairs. Upgraded bearing solutions available from LN Engineering or Flat 6 Innovations. 20-25 hours labor for standalone IMS retrofit including engine R&R.

Estimated cost: $4,500-7,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid dripping from belly pan area, Burnt transmission fluid smell after spirited driving, Low transmission fluid warnings on PDK models, Visible fluid pooling under car after sitting overnight

Fix: Replace cooler lines and seals, drain/refill transmission fluid. PDK models require specific Pentosin fluid and adaptation resets. 3-5 hours labor depending on model (manual vs PDK) and access.

Estimated cost: $800-1,500

Typical onset: 60,000-100,000 mi

Symptoms: Excessive drivetrain clunk during hard acceleration or deceleration, Visible engine movement when revving in neutral, Increased cabin vibration at idle, Abnormal driveline noise over rough roads

Fix: Replace engine and transmission mounts as a set for best results. Many owners upgrade to stiffer aftermarket mounts (GMounts, Fabspeed). 4-6 hours labor for full mount replacement including subframe access.

Estimated cost: $1,200-2,200

Typical onset: 70,000-120,000 mi

Symptoms: Rough idle and hesitation on cold starts, Reduced power and throttle response, Misfires under load, especially in higher gears, Failed emissions testing due to misfire codes

Fix: Walnut blasting intake valves through intake manifold removal. All six cylinders must be cleaned. Some shops recommend doing this preventatively at 60k miles on DFI engines. 8-12 hours labor including manifold R&R and throttle body adaptation.

Estimated cost: $1,500-2,500

Typical onset: 50,000-90,000 mi

Symptoms: Deep knocking sound from bottom end at idle, Low oil pressure warnings, especially when hot, Metal debris in oil filter during inspection, Oil pressure gauge reading below 2 bar at operating temp

Fix: Full crankshaft removal, inspection, and bearing replacement. Often discovered during bore scoring repairs. Crankshaft may need regrinding or replacement if journals are damaged. Adds 10-15 hours to a full engine rebuild.

Estimated cost: $8,000-12,000