Nissan VC-TURBO BAD ALREADY? 2021 Rogue 1.5 3-Cylinder

I'm sure everyone has figured this out, but as to the link names:
A = Actuator
C = Control
L = Lower
U = Upper

Many more bearing surfaces and was the oil pump larger to provide lube for these additional demands?

Twice as complicated, twice as expensive, unnecessarily heavy, half the efficiency.

Must be British.

I have been waiting patiently for this! I work at the Nissan Assembly Plant in Canton MS. I can tell you that the US/Canandian Rogues are assembled in Smyrna TN. To quote Wikipedia: "For the 2022 model year, the Rogue received a powertrain update, except for the Canadian base model. The 2.5-liter PR25DD four-cylinder was replaced by a 1.5-liter KR15DDT three-cylinder variable-compression turbocharged (VC-Turbo) engine, which is more powerful with 201 hp (150 kW; 204 PS) and 225 lb⋅ft (305 N⋅m; 31.1 kg⋅m) of torque, while being more efficient. The Xtronic CVT transmission also was given an update; this gave the CVT a 17 percent higher gear ratio spread and reduced the internal friction by 32 percent.[53]"||

…and further from Wiki: "On December 13, 2023, American agency NHTSA opened an investigation into customer complaints of engine failure in the Nissan's KR15DDT and KR20DDET engines, the former being used since the Nissan Rogue update in 2022. The complaints allege engine failure, loss of motive power, engine knock, or noise and/or metal chunks and shavings being found in the oil pan of vehicles with these engines.[5] The cause appears to be seizures and damages to the main bearings and L-links.[6] Nissan stated that they are attempting to address these failures by changing their manufacturing process.[6]"

YMMV

Thank you so much for tearing this down! Keep up the good work!

Wow! Lotta extra weight to swing around even though its got the shortest stroke on the road. The rod journals 'hydrodynamic wedge' gets pushed from two directions with this setup and may be working that bearing too hard even though it looks very large. The Mains are 360degree grooved, not a common practice now, so Nissan wanted extra lube going to the rod journals for sure and it still failed, with the other 2 showing significant wear after low mileage. Thanks, good video, interesting stuff. ALSO, All aluminum bore engines should be avoid or even outlawed!!!! Briggs & Stratton Tried this in the 50's!

its really cool to see what was once just an idea in the 1980's with variable compression actually come to life, and from 2016. these types of engines will be in everything going forward, likely until they are replaced with electric. they can meet emissions with low octane gas, but also can support higher power outputs if you put better gas in. so they can "meet emissions" with 87 or 85, but get 200+ HP with 93 or 105.

This engine bolted to a CVT is a double whammy. All that VC complexity for 200hp out of a turbo 1.5l. Not worth it, IMO. If you ever needed coaxing to talk yourself out of a Nissan Rogue, this is all you need to dissuade yourself. Remember when Nissan made sensible cars that were easy to repair? I do. Those days are gone. The only Nissan economy car to consider is a port injected Versa with the still available 5-speed manual.

Can't wait til a Hydro-Fusion fails

I have to tip my hat to the engineers who created this engine. From a technological point of view, it is very impressive. Now, owning one is a whole nother animal. The more complex the machine, the more points of failure.

I remember back in my college days in the early 80's, we toured the Mobile Oil research plant in Paulsboro, NJ. They had single cylinder test engines with variable compression they used to test fuel octane. The compression ratio adjustment was accomplished by varying the height of the combustion chamber at the top of the cylinder. The nerdish side of me thought there should be a more practical method of accomplishing a variable compression engine. I put crayon to paper and started drawing ideas. I came up with an adjustable fulcrum on the end of the connecting rod actuated by an eccentric. So it looks like I invented it. No, not really. I had the idea. I also decided at the time that it would be too complex, too expensive, and unreliable. It's interesting to see how it actually works in practice, and I am not surprised that it's prone to failure.

Is this one of those scotch link motors

Friend has Infiniti 2.0 version of this. Lifetime warranty. He is selling it and buying a new Mercedes glc350. He has money.

Consider this little thing produces similar HP to a lot of 1960's V8's did, and more than most…. at a fraction of the displacement and weight and a substantial improvement in fuel efficiency. Once they resolve the common points of failure (and lets be real, they will, its Nissan)… seems like a genuinely revolutionary engine. "neat" 🙂

what an absolute piece of garbage engine. Do we need such complicated crap to go places, pure evil design. Just give me a 225 cube slant 6,
runs forever and cheap to maintain.

I doubt you will be able to find out at a reasonable price but I would like to see the new Toyota dynamic force engine tore down. Preferably the m20a-fks but any of them would be great.

Now you need to get ahold of a BMW variable compression engine. Definitely a different animal.

The more "stuff"there is, the more stuff there is to go wrong.

I have that same suburban in white. Love it

I don't understand the purpose of the variable compression

I bet this is a Renualt design…………it has that French smell about it

Love the tear down, especially your observations and points to consider. You've elevated your videos to a higher level again. Thank you.

Lmao I work for Nissan and the Vc turbo 3 cyl are constantly going bad all around 20k miles, they have bad oiling and all get locked up the 4 cyl versions aren’t as bad tho

Amazing! WoW!