3.3TT Will carbon buildup be a problem?

[sensicalnonsense]

Do I need to use a valve cleaner like a CRC intake valve cleaner, every 10k or so miles?

Some youtubers said valve cleaning is necessary for GDI, but others say Kia/Hyundai GDIs are different, and that they are able to clean themselves.

 

[MerlintheMad]

I don't know about "clean themselves", but gas additives approved for the Stinger will be performed at the recommended mileage by a "qualified Kia service" team. Have faith.

 

[StingerNYC]

Not sure how a gas additive will clean intake valves on a gdi engine. The gas is injected directly into the cylinder and won't be touching the intake valves. Seafoam and others make a gdi cleaner that you shoot directly into the air intake for that reason.

 

[sensicalnonsense]

Not sure how a gas additive will clean intake valves on a gdi engine. The gas is injected directly into the cylinder and won't be touching the intake valves. Seafoam and others make a gdi cleaner that you shoot directly into the air intake for that reason.

Seafoam should be part of the routine maintenance?

 

[StingerNYC]

I don't know. Someone would need to take one apart and see how the valves look after 10, 20, 30000 miles.

 

[RLam]

Like StingerNYC said only time will tell. I doubt Kia/Hyundai have found some secret formula for keeping their valves cleaner than any other maufacturer’s DI engines. Your best bet is to go look at some other Kia model forums and see what issues/successes they are having on their engines.

 

[eflyguy]

Not sure it was Stinger (or even H/K) specific, but somewhere I saw a video where the injector is positioned so that some of the fuel vapor hits the back side of the valves when open.

 

[KLR STINGER]

These motors use the standard single injector GDI configuration, not the two stage fueling system on some of the most recent DI designs( ie new ford 3.5 with both port and direct injection.) The 3.3 will certainly have the same issue carbon build up issues as other GDI motors. When I changed the spark plugs a 2500km, there was already hints of oil sheen build up in intake ports and valves. Its definitely going to be an issue over the long run

 

[StingerNYC]

These motors use the standard single injector GDI configuration, not the two stage fueling system on some of the most recent DI designs( ie new ford 3.5 with both port and direct injection.) The 3.3 will certainly have the same issue carbon build up issues as other GDI motors. When I changed the spark plugs a 2500km, there was already hints of oil sheen build up in intake ports and valves. Its definitely going to be an issue over the long run

Then I do not regret getting catch cans.