Hi alll. I am in the market for a new Integra and wanted to know about your experience with the 1.5t liter engine . Currently caught between a 2023 Integra base/Aspec and a 2022 Civic Sport 2.0, and while I find the Integra to be my first choice if given a great deal on both, I do have concerns with the long term reliability of the 1.5t engine as I plan to keep this car longer than 5 years. I know that the older 1.5ts on the accords and civics had issues with oil dilution and blown head gaskets and I fear that this same issue may have carried on into the Teggy model years and this may especially be an issue living in nyc where shorter trips may be frequent and temperatures get colder in the winter time. Now I know the car is only 2 years old and it is hard to analyze how reliable the engine may be, but for those of you who own ones that are higher mileage I would like to hear from you guys. Has the 1.5t engines given you any trouble to date? How about the cvt transmission, are those still going strong. Let me know what’s going on with your rides.

 

Bump...because I am curious about this 1.5T engine too (but I am looking at the 6MT A-spec).

 

2022 Civic Sport has a classic K20 in it with traditional port-injection.
New Integra has the L15 turbo in it which has direct-injection instead.

Direct-injection engines are more maintenance-needy and require things like valve cleanings and more frequent oil changes.

 

Supposedly when queried about this, the chief engineer for the 1.5T engine, taking Q&A at an LA event with Civic owners... stated flatly that they expect no carbon build up in this engine as they designed the valves to slowly rotate over time and they let a small amount of fuel wash up onto the valves as part of normal combustion, which allows the engine to self-clean the classic spot for carbon build up.. around the valve area.

Source: https://www.crvownersclub.com/thread...-or-no.195407/

 

DI engines have an injector spraying into the cylinder at much higher pressures than injectors for port injection. The fuel is sprayed during the compression stroke when the intake valve has already closed, and the exhaust valve won't open until the combustion stroke has completed and the piston is moving back up.

In this context, can anyone explain how fuel gets into the valve seats?