G4NA vs Kappa 1.0 T-GDI (G3LC)
Side-by-side reliability comparison
Specifications
Character
G4NA
"The port-injected 2.0 non-turbo petrol of the Nu family, used in the Hyundai Tucson TL, Elantra, i40 and ix35 and the Kia Sportage QL, Optima, Cerato and Soul. Simple and cheap to service, with a timing chain and no direct injection. Its weak point is the thin-liner aluminium block: Russian specialist press and workshops report piston and cylinder scuffing, sometimes before 100,000 km, often started by debris from a disintegrating catalytic converter, and oil consumption from sticking oil rings. Hyundai added piston-cooling oil jets and stronger bearings from 2017. Keep oil changes short and check for knocking on a cold start."
Kappa 1.0 T-GDI (G3LC)
"Three-cylinder 1.0 turbo with direct injection in the i20, i30, Kona, Bayon, Rio, Stonic, Picanto and Ceed. Used-car guides rate it well and report few engine failures. Expect coked injectors and intake carbon at higher mileage, occasional turbo oil leaks, and check that the i20 vacuum-hose recall has been done. Thirstier than its size suggests."