2020 Porsche Cayman Pre-Purchase Inspection Checklist
Known Issues — 2020 Porsche Cayman
MODERATE
4.0L flat-six GT4 — bore scoring risk on high-mileage examples
MINOR
Turbo 4-cylinder wastegate rattle
MODERATE
Carbon buildup on turbo intake valves
MODERATE
GT4 manual gearbox synchro wear on aggressive track use
MINOR
PDK software calibration harshness in sport mode
MODERATE
Oil separator failure on turbo variants
What to Inspect
- GT4: full compression and leakdown test
- GT4 gearbox synchro — check 2nd gear engagement especially
- Turbo: cold start rattle and intake valve carbon
- Check for PCCB (carbon ceramic) brake condition if equipped
- Track event usage history
- All electronics including sport chrono and PASM
Expected Maintenance Costs
| Service | Interval | Cost |
|---|---|---|
| Engine oil service | every 10,000 miles | $180-$300 |
| Intake valve walnut blast (turbo) | every 40,000-60,000 miles | $500-$800 |
| PDK or manual transmission service | every 30,000-40,000 miles | $300-$600 |
| Brake pad/rotor replacement (or PCCB inspection) | every 25,000-40,000 miles | $700-$2,500 |
| Major service (plugs, filters) | every 30,000 miles | $700-$1,200 |
| Tire replacement | every 15,000-25,000 miles | $900-$1,600 |
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