2026-10-08 · 5 min read
Nissan Almera Carbon Buildup Malaysia
B17 VG20 uses port injection — minimal carbon buildup on intake valves. N18 HR10DDT uses direct injection — carbon buildup on intake valves is expected at 60,000–80,000 km. Walnut blasting or chemical cleaning recommended at 80,000 km for N18. Symptoms: rough idle, hesitation on cold start, slight power loss. Using top-tier petrol (RON95 or RON97) helps reduce deposit rate.
B17 VG20 uses port injection — minimal carbon buildup on intake valves. N18 HR10DDT uses direct injection — carbon buildup on intake valves is expected at 60,000–80,000 km. Walnut blasting or chemical cleaning recommended at 80,000 km for N18. Symptoms: rough idle, hesitation on cold start, slight power loss. Using top-tier petrol (RON95 or RON97) helps reduce deposit rate.