2022 Toyota Tundra Hybrid

[cRiPpLe_rOoStEr]

Originally Posted by Hersbird

Playing with turbos on the bread and butter at this point is a bad idea IMO

I still remember when Toyota kept a naturally-aspirated Diesel with old-school indirect injection available for the JDM Corolla at least until 2004, and at least until 2018 for some other markets, even though it already resorted to the D-4D tech in Europe at least since the early 2000s. But anyway, considering so many Toyota trucks, vans and SUVs available with turbodiesel engines worldwide, I'm sure they learned some good lessons before applying it to gassers in America.

[Hersbird]

Turbo diesels are much more reliable because they had to have everything already over built for the diesel part. Strong rods, strong pistons, strong crank well bolted into a strong block, with a well attached strong head. Even then turbo diesels still have plenty of turbo failures along with the associated parts. Something non-turbo diesels never experience.

[Isaac Zachary]

I remember one bus driver in particular that had more than one failed turbo on her bus. She was also the only bus driver who would come off the highway, park the bus and shut it off right away. The rest of us would idle for a minute to cool down the turbo before shutting off our buses.

[redpoint5]

I installed a tuner for my diesel truck that has the option to idle the truck until exhaust temps come down to a set threshold, to protect the turbo.

[Hersbird]

Unfortunately these hybrids with turbos will do just the opposite. With the start/stop they will be shutting off the engine at every single stoplight even if it's just for 20 seconds. Then the turbo feels fun to boost so the real world owner goes high boost, high EGT off the line, only to hit the stoplight and have the motor shut down, and then repeat.

[JSH]

Originally Posted by Hersbird

Unfortunately these hybrids with turbos will do just the opposite. With the start/stop they will be shutting off the engine at every single stoplight even if it's just for 20 seconds. Then the turbo feels fun to boost so the real world owner goes high boost, high EGT off the line, only to hit the stoplight and have the motor shut down, and then repeat.

This isn't new. European cars have been combining stop/start with turbos (both gas and diesel) since the 2000's.

[Isaac Zachary]

There are a couple things that may make that work. One is I've heard that turbos with certain bearings (ceramic?) aren't affected by shutting them off right after driving. Another is if there's still coolant (either antifreeze or oil, whatever cools the turbo) being pumped through the turbo to cool it.

[cRiPpLe_rOoStEr]

Newer turbochargers are not the same as 20 years ago. At least one aftermarket supplier in my country claims to have improved cooling and lubrication, yet AFAIK it doesn't make any variable-nozzle turbocharger and doesn't mess with electronic wastegates.

[Hersbird]

Originally Posted by JSH

This isn't new. European cars have been combining stop/start with turbos (both gas and diesel) since the 2000's.

And they haven't been any more reliable. I can't think of a single European maker that I would consider reliable. Almost the exact opposite, you go in expecting massive maintenance and future problems.

[JSH]

Originally Posted by Hersbird

And they haven't been any more reliable. I can't think of a single European maker that I would consider reliable. Almost the exact opposite, you go in expecting massive maintenance and future problems.

First, most repairs in European brands are due to electrical issues not failures of the core drivetrain. Turbo failures are pretty rare from any manufacturer and generally go the life of the vehicle.

European brands also tend to do a lot better with proper maintenance. People in the USA have a bad habit of second guessing the manufacturer and using incorrect oils and other fluids. Either because it is something they have always used or just because they are cheap and don't want to spend the money for the advanced synthetics.

We also have a bad track record when it comes to doing regular maintenance outside of changing the oil. People will change the oil every 3,000 miles at the quick lube but never changing the transmission fluid and then are surprised when a dual clutch transmission fails. They never change their brake fluid then complain when an ABS module fails.

European brands engineer their products based on regular maintenance being done on time and properly.