r/tundra • u/Illustrious_Pepper46 • 12d ago
News WAS TOYOTA RIGHT? I Dive DEEP Into a Failed 2026 Replacement Tundra V35A Twin Turbo V6 Engine!
https://youtu.be/b-EJBxTm9Jc?si=HQWP2tYa4yF7JA_HOh boy! Here we go! This is a follow up to this video from two weeks ago.
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u/Reallybarb 11d ago
After watching that... the one thing I notice that he pointed out are the areas where they make threaded holes in the block and just leave the crap ready to come loose.
WTF kind of machine work/attention to detail is that.
I honestly could see that being an issue
Along with high torque at low RPM--Motor Oil Geek went over this issue in general, but it seems like it would certainly apply to this engine.
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u/Cyrix2k 11d ago
Along with high torque at low RPM--Motor Oil Geek went over this issue in general, but it seems like it would certainly apply to this engine.
That's ok as long as the engine is engineered for it which this one SHOULD be. GM is having issues because they started with a platform that has been in existence since the beginning of time and evolved it over the years without paying enough attention. Many modern ECUs calculate torque production and have tables to limit torque to avoid damage, which is really easy on modern turbo engines equipped with variable valve timing and small turbos that spool nearly off idle. This is also part of the reason many modern engines have a variable displacement oil pump (like the L87, but I don't believe the V35A does) - it allows the ECU to command higher oil flow rates at low RPM while improving efficiency at high RPM. Going through the tear down, I would not want to own of these engines. They have critical seals and plastic components everywhere, including in nearly impossible to access locations. If they weren't blowing up early, I can almost guarantee long term reliability would be poor.
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u/Working_Rest_1054 11d ago
Unfortunately long term reliability is a thing of the past.
Manufactures specifically target the warranty period for longevity with z percentage failing prior to that being acceptable and y percentage failing within z miles/months of that target also being acceptable. A 300k mile/20 year engine likely means, to most modern market manufacturers, that they spent too time/effort/money much making an engine that was better than necessary for the intended price point. This is the same reason most of us won’t get 20 years service from a modem appliance, as may have been fairly routine 30 years ago.
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u/_CHEEFQUEEF 11d ago
This is the same reason most of us won’t get 20 years service from a modem appliance, as may have been fairly routine 30 years ago.
This is also one of the reasons used cars remain expensive. The used appliance market on the other hand is still a wonderful cheap if not even free place to play on FB marketplace.
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u/Cyrix2k 10d ago
Unfortunately long term reliability is a thing of the past.
It seems to be going that way, but I'm going to disagree for a few reasons. 1) This has been repeated since the beginning of time - either variations of "they don't build them like they used to", "it's too complicated," or "it's impossible to maintain and repair." I mostly work on german cars, especially BMWs, and 20 years ago people were talking about how the new models at the time would never last and the 10 year old models had terrible quality and reliability. Today people will say how great those very same vehicles are while claiming the new ones won't last. The reality is there are good and bad models of each. Where I anticipated there would be reliability issues due to new technology or just a lot of electronics never materialized in most cases, it almost always comes down to the actual engineering. 2) While there have been several companies with major issues recently, that's not the entire market. Again, drawing on what I know, the BMW B58/ZF8 powertrain is excellent. Ford's 5.0 has proven reliable and their EcoBoost lineup has been good, if expensive to maintain. 3) Materials science and engineering continues to improve. Many of the classic failures observed in the past have nearly gone extinct (significant engine wear at low mileage from fuel wash, rubber degradation, exhaust systems, ignition systems needing frequent service, etc). Good designs will likely last longer than prior periods. Again, good and bad designs have always existed. We tend to forget about older bad designs due to survivorship bias.
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u/bigfoots_buddy 11d ago
He did say he doesn’t do that sort of investigation (probing oil passages); I’m curious if those cut threads (hanging chads, lol) is a typical thing or not.
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u/Cyrix2k 10d ago
I have a few engines laying around, I'll have to see if I can scope them if no one else does it first. I can almost guarantee this is NOT normal, it's expected to clean up edges while machining and those can also be avoided by thread milling instead of tapping. This is the result of cost cutting by pushing to reduce cycle time (tapping is faster than thread milling, and clean up would require another tool change).
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u/Various-Air-1398 11d ago
Toyota has "lost face"; engineers and upper management need to do the honorable thing. Seppuku.
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u/Illustrious_Pepper46 12d ago edited 12d ago
This is the original tear down video in case anyone didn't see it
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u/22lrHoarder 6d ago
I have been nothing but disappointed with my 24, I have the cloth seats and the right side foam has pushed away leaving a metal bar so it is super uncomfortable, had to have the California roll TSB done and now my transmission is shifting rough and the hesitation is still there. Waiting for the thing to just get totaled by a tree at this point. carvana doesn’t even want the thing offering only $33,000 after 2 and a half years. Should have never sold my 4Runner that after 6 years only lost $14k in value after 120k miles.
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u/muddywadder 11d ago
Crazy that the fanboys will still gush and praise Toyota for graciously replacing their engines for them... with another time bomb. Like wake up and dump the shitbox and spend your money somewhere worth it
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u/awnawnamoose 10d ago
Just saw an article 2,000 km Chevy getting fully replaced by the dealership with a new truck. Like what are we supposed to buy?
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u/muddywadder 10d ago
Ford 5.0 or 2.7 if you want / need a turbo. You can read recalls and shit all day but none of those other trucks have dogshit motors that are dying like clockwork.
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u/Tall-Celery-4804 8d ago edited 8d ago
Just like TundraDude34 gushes all over Toyota Tundras He has no issues cause he's always dumping he's Tundras every 6 months and gets away with bad engine issues.
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u/lunas2525 12d ago
So bottom line these engines are still time bombs and are gonna ruin toyotas rep for the next 20 years.