Porsche 718 Carbon Cleaning Malaysia
718 2.0L and 2.5L: direct injection — no port injection to clean valves. Carbon on intake valves at 60,000–80,000 km: rough cold idle, hesitation, reduced power. Walnut blast: 4-cylinder smaller intake, RM 900–1,400. GT4 4.0L NA flat-six: port injection — no carbon concern. GTS 4.0L also port-injected: no walnut blast needed.
Porsche 718 Carbon Buildup — Intake Valve Cleaning
Carbon buildup ONLY affects 2.0L and 2.5L turbocharged flat-four variants (direct injection). The GTS 4.0 and GT4 use port injection — their intake valves stay clean and do NOT require walnut blasting.
- 2.0L/2.5L turbo: walnut blast required at 60,000–80,000 km — RM 1,200–1,800
- Symptoms: rough idle, reduced power, increased fuel consumption
- Using catch-can (oil separator) can slow carbon accumulation by 30–40%
- GTS 4.0 / GT4 / Spyder (4.0L NA): NO walnut blast needed — port injection keeps valves clean