3.4L TTV6 Engine Failures (V35A-FTS)

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ES300h

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qtb007 said:
So, another data point to not watch Car Care Nut. The title should be "what it looks like when you skip 4 oil changes" rather than "Lexus Turbo Engine blown". He is intentionally being misleading to gets the clicks. :rolleyes:
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This is how YouTubers get people to click. It works and that's why nearly everyone does it. Clickbait titles work, which turns into views & profit. I have seen much worse titles, at least his title was accurate.
 
qtb007

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ES300h said:
This is how YouTubers get people to click. It works and that's why nearly everyone does it. Clickbait titles work, which turns into views & profit. I have seen much worse titles, at least his title was accurate.
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I realize that, but I'm going to continue to rail against it because it is a crappy practice and maybe some people will stop giving "experts" like him clicks.
 
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Flagship1

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I can’t go any further on the combination of cap, ladder, bolts, crankshaft. To go further would require some major effort in actual testing and evaluation.

The wear pattern seen so far suggests the bearing is getting an uneven wear pattern. In these instances the bearing is still fairly smooth but has black marks that are from lube oil cooking. This is from heat build up in those areas. The black spots are on the edges and the corners of the bearing, both upper and bottom half. A video way up thread showed this somewhat clearly right at the end of the video with the failed bearing halves visible right next to each other.

Debris ( if caught early enough) will look like scratches and grooves . In the end phase of the bearing failure debris related failures have wear patterns that look like an overloaded bearing: the material is wiped around and chunks missing. At these heat levels the Babbitt gets amorphous and start to flow itself.

so the failures that have a strange wear pattern and are not destroyed seem to indicate 1) there are other failure modes at play 2) why some trucks are going 20,000 or more miles.

(debris related failures in journal bearings show up very very early in operation.)

To get a wear pattern like that the bearing is experiencing some form of misalignment.

The cap is being deflected one way or another ( “ cap walk” is a familiar thing with high horsepower engines).

The cause of this goes to how the cap is registering with the block ( jaw fit).

if this jaw fit is not rigid enough the cap can walk around causing the bearing to ride on the crank in a funny way leading to a wear pattern that looks like the crank has an out of shape journal.

because not every single engine is experiencing this, it looks like a statistically anomaly in manufacturing.

jaw fits slightly off, main cap bolts stretching slightly ( because a slight defect in manufacturing), or the ladder is having a strange interaction with the cast iron cap and also the engine block.

(I’ve seen this in large compressor crankshafts where the tie bolts weren’t tight, and when the main cap was not machined correctly, and when the main bore was not straight. In each instance a wear pattern was very clearly showing a misalignment. We could catch this issue before total bearing failure because the main bearings were instrumented with temperature sensors. )

The potential solutions would involve some revisions to these parts. It wouldn’t be a whole redesign. They’d also have to get to the #1 main to replace it.

they may even have an interim engine calibration that reduces load on the bearings as a stop gap.

the solution for the debris is just good old fashioned detective work with root cause analysis. Sample the debris for basic material characterization and trace it backwards in process from there.

( I saw an issue once where a rash of power steering pump failures was traced to an employee who was intentionally putting rubber bands in the pump…it all started with “ why is there a rubber material getting into these pumps?”)

( another anecdote: I helped lead a black belt project on a rash of thrust bearing failures that appeared out of nowhere. We twisted ourselves into bloody knots following standard procedures for this kind of situation. We beat up the manufacturing process every way we could. It turned out to be the outside vendor had changed materials and never told anyone.

one thing we found out during all this was the torque converter and pumps were putting 3x the axial force to the crankshaft as was specified in the design… so the bearings would have had a shorter life span regardless of the material defect)
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www.tundras.com

OFFICIAL MY22+ Tundra/MY23+ Sequoia V35A-FTS (Type '21) Engine Failure Discussion Thread

You’ll see when they come up with a fix. It’ll be evident what the cause was by what part numbers change in the fix. I was just about to post that on...
www.tundras.com www.tundras.com
 
mikeavelli

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All these Youtubers should be held accountable for misinformation. This is what i despise about youtube. Any idiot can get lucky with some followers and act like their channel is truth. I have to constantly monitor what my child watches.

One of the reasons I only have 12k followers. I barely show myself, I don’t click bait and no ugly photos of my licking my own ass as a thumbnail to get attention. Will I be a bit biased to Toyota and Lexus. Yes and I make no apologies for it. Would you rather me be a Honda fanboy like all the other channels lol.
 
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sl0519

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mikeavelli said:
All these Youtubers should be held accountable for misinformation. This is what i despise about youtube. Any idiot can get lucky with some followers and act like their channel is truth. I have to constantly monitor what my child watches.

One of the reasons I only have 12k followers. I barely show myself, I don’t click bait and no ugly photos of my licking my own ass as a thumbnail to get attention. Will I be a bit biased to Toyota and Lexus. Yes and I make no apologies for it. Would you rather me be a Honda fanboy like all the other channels lol.
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Why not? I'd be curious to see u shilling for Acura, since you are so much in love with Honda products.
Right Mikey?
 
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pacman1

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mikeavelli said:
All these Youtubers should be held accountable for misinformation. This is what i despise about youtube. Any idiot can get lucky with some followers and act like their channel is truth. I have to constantly monitor what my child watches.

One of the reasons I only have 12k followers. I barely show myself, I don’t click bait and no ugly photos of my licking my own ass as a thumbnail to get attention. Will I be a bit biased to Toyota and Lexus. Yes and I make no apologies for it. Would you rather me be a Honda fanboy like all the other channels lol.
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No zoom in photos of nostrils and no clickbait? Enough said. Subbed brother.
 
mikeavelli

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sl0519 said:
Why not? I'd be curious to see u shilling for Acura, since you are so much in love with Honda products.
Right Mikey?
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I honestly wouldn’t know where to start since they have zero traits better than any of the competition. Maybe the civic i guess. Being a Honda or Acura fanboy is nasty work unless it’s the 90s, 2000s stuff.

Lexus and Toyota at least gives me multiple things to work with 😁
 
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mikeavelli

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I guess I should make a video on our Lx 600 experience. Cause again outside a couple minor issues it’s been solid. I’m not talking about things I would like: pano roof, massage seats etc.

From a reliability and quality standpoint it’s been excellent.
 
Tragic Bronson

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mikeavelli said:
I honestly wouldn’t know where to start since they have zero traits better than any of the competition. Maybe the civic i guess. Being a Honda or Acura fanboy is nasty work unless it’s the 90s, 2000s stuff.

Lexus and Toyota at least gives me multiple things to work with 😁
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You do have give Tyson credit because he recently purchase a Gen 1 IS (03 Sportdesign manual) not too long ago

And his brother has owned a Gen 1 IS that is turbo'd and may be familiar to the IS community
 
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Flagship1

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any update on a resolution on the v35a? The silence on this issue from toyota is what is driving the youtube university pundits to make these clickbait filled videos become the bible on all things v35a.
 
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Tragic Bronson said:
You do have give Tyson credit because he recently purchase a Gen 1 IS (03 Sportdesign manual) not too long ago

And his brother has owned a Gen 1 IS that is turbo'd and may be familiar to the IS community
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Not sure who he is but i’m happy for him lol
 
mikeavelli

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Flagship1 said:
any update on a resolution on the v35a? The silence on this issue from toyota is what is driving the youtube university pundits to make these clickbait filled videos become the bible on all things v35a.
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There is a stop sale. People have to be patient. They are diligently at work on fixes and solutions. Unfortunately it takes time. I rather them take their time to make the proper fix and recommendations than rush a band aid. When ready i assume another press release goes out.

Yes I have talked to people in quality. I don’t envy their work on daily basis recall or no recall. Respect to them.
 
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Flagship1

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Gecko said:

This video is pretty fair and balanced, and he makes some interesting points about Toyota changing over key engine part numbers in January and April of 2024. Hopefully these engines are solid going forward - time will tell.
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I watched the video, and I do agree I do see some piling on the tundra. For instance was reading a complaint of squealing brakes in the morning and how embarrassing it is....surface rust, but I guess other makes and models brake rotors dont rust?

There are legitimate issues that toyota needs to address on TNGA, dealership management, and then their is just wtf?
 
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Flagship1

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The new and improved Scotty Kilmer, now saving Toyotas reputation one BOF at a time. Was the 3.4 video made before or after his purchase?
 
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