If you're a Gen 3 owner, what do you do?

The crank is plausible. I like that one. I still think machine debris upstream is possible too. Either debris would easily consume a bearing. My first consideration is that the crank could be an easier fix because perhaps the cranks could be isolated and perhaps the debris contained to a single place as opposed to who knows where the hell it is in motor now. Lots of perhaps but the crank seems like a good theory. Back in the day service could do bearing work at the dealer level. Due to the cost structures, I find it unlikely labor at that level would be used now. Interesting theory though.

 

Don't forget the crankshaft bed. I've have no experience in this engine design, looking at diagrams, if there are oil passages it's potential also. Question is, are the crankshafts and or crankshaft beds single sourced?

 

Nothing of substance will be posted unless and until Toyota speaks up and tells us the real story, IF they ever do. Until then the internet mechanics here will try to fill that void with all manner of speculation having zero data to base it on. And if one of the guesses proves to be close to true, they will want those internet points! But what else do we have to do until late July? I guess this beats worrying too much about when our engines are going to explode.

 

Just when you think a thread has completely degenerated into a penis measurement and poo flinging contest, some actual content.
Still speculation of course, because that's the real answer to the "what do you do" question, but at least it feels like adults are talking.
For the moment anyway.

 

I’m starting my SWAG with the simplest answer.

1.) What part could it originate from that is probably not made by Toyota in house? Because they will have checked over all their own stuff first because they have unfettered access.

2.) What part is the first source of oil flow upstream from a main bearing that has oiling passages machined or drilled in it?

3.) What is materially a possible source of hardened metal debris that can and will embed in a bearing shell?

My first answer that most probably meets those criteria and is dirt simple is the crankshaft. At least that’s the first place I would look.

 

Is there a data which crank bearing fails? #1? (front).

 

Yeah, I mostly agree. I will summarize what I know for sure:

--Gen 3 Tundra engines are failing at a rate that caused Toyota to declare a recall. What that exact rate is, IDK.
--I can read the failure thread to see how this issue presents to drivers, but that doesn't tell me much, if anything, technically.
--Toyota's report mentions debris as a potential cause but provides no mechanism as to how that might happen.
--Some numbers of engines built after the production changes to "fix" the debris issue are failing. Same rate as before? Less? And what does that mean? IDK.

Unless I am missing something that is literally ALL I know.

Then we get 150 pages in one thread and 25 or so in this one from that. Half of that is speculation on the failure modality, the other half is moaning. I myself have probably done both. LOL. It is interesting to a point but sometimes borders on the ridiculous. I am just going to have to unwatch this thread for a few weeks or go into a 12-step program.

 

in theory I agree but entrenched sides of being right when it is all but speculation is downright obnoxious. The “does the truth hurt?” Garbage is lame and so is the belittling of someone who has concerns even if Toyota will “fix it”.

Reminds me of a troll on an old sports message board I was on. Constantly screaming about how he was right. Ended a rant with “THOSE ARE THE FACTS IMO”

 

Who said he is taking a loan? Not all of us on here have to resort to borrowing like you. Another assumption by @assumptionphilly

 

I could have never imagined that my first new/different pickup in 20 yrs would have resulted in this shit mess. I drove a 2003 Silverado from new until March 2022 and it definitely had its nickel and dime issues which steered me away from GM.
I test drove a 2.5 Tundra in 2019 and was not enamored with it in any way. It was like I was driving a 10yr old truck when it was brand new. Then in 2021 I started seeing news of a redesigned Tundra that would put it on par with the current Big 3 offerings, oh boy we’re in business now!
Picked up the new Tundra in April ‘22, drove it straight to my shop and installed a level kit with 35’s on TRD wheels. I was proud as a peacock, driving around in my rare at the time 3rd gen Tundra.
Fast forward to December 2022, with 8600 miles on the clock, she blew up on a cold December night. I was one of the first and kind of went through hell as my dealer really didn’t know what to do while corporate was having engineers look at it and write SOP’s for tear down.
I looked into a buyback at that time but the interest rates, coupled with the $3-4k increase in prices from ‘22-‘23 didn’t make financial sense so I took the 7yr/100k bumper to bumper that was offered.
Now here I sit, looking at having to have yet another engine installed in this pickup while the value plummets even further….FML

 

I’m now at 26k miles and no it hasn’t let go again but if they end up having to replace engines under the recall it’ll have 3 installed in 30k miles.

 

I like this guy. He actually understands how a combustion engine works and how complicated the lubrication system is. If this #1 bearing failure is due to debris in the engine its originating from upstream of the #1 bearing, which is being exposed to the majority of the debris first. The crankshaft shaft passages is a likely bet. Combustion engines have gotten more complicated, but the basic principles still apply.