Question 1

Carbon build-up on the inlet valves (1.6 GDi)

Accepted Answer

Direct-injection petrol engines don't wash the inlet valves with fuel, so carbon builds up over time. The result is misfires, rough idle (especially from cold), hesitation and loss of power.

Question 2

Oil consumption and engine bearing failure (1.6 GDi)

Accepted Answer

Hyundai/Kia's Gamma and Theta GDi petrol engines can burn oil and, in some cases, suffer connecting rod bearing failure, giving a knocking noise, an oil warning and engine seizure. Carbon build-up on the inlet valves also causes rough running.

Hyundai TucsonTucson TL

Known issues and common problems

Hyundai TucsonTucson TL

Known issues and common problems

Carbon build-up on the inlet valves (1.6 GDi)at 110000 km · 1 solutionsMedium

Oil consumption and engine bearing failure (1.6 GDi)at 120000 km · 1 solutionsHigh