The video every 3rd gen owner wanted.

TCCN’s V35A teardown.

I’m pretty sure Ryan donated the block, thanks Ryan!

https://youtu.be/VBRS_cffEhM?si=Kk18pCy4ENVCkMVl

 

Doesn't give the warm fuzzies.

 

I’ve seen worse things.

 

I enjoyed the video.

But, why would someone donate this engine to this guy, and not give him the specifics on mileage and the "event" that took it down?

I'm still not convinced the engine failures aren't related to the main bearing girdle design, versus having individual main caps. The lack of bearing locator tabs also is suspect to me. That seems like an invitation to have the bearings walk.

 

Are locator tabs going to stop a bearing from walking ? He seems to say no

but not sure what there is to gain , besides some entertainment from a motor that was oil starved and went boom and they don’t know why or how many miles

would have been cool to see one pre and post bearing issues

and a new one to see what Toyota changed

 

Very cool - Heading there now. Thanks

 

Interesting indeed.

 

Absolutely tabs help prevent bearing walk, or at least prevent bearings from moving while installing the crank. You saw how he fumbled with that in the video.

On older engines that I'm familiar with, every main bearing and cap had a specific location. A typical build included checking the oil clearance on every main bearing. I know this new girdle design has been around for a while, but I'm not convinced it's a better design.

 

My theory is the strange coating this guy found on the main bearings is just a disposable coating that compensates for different oiling tolerances across all the main bearings due to the girdle design's lack of precision.

Probably cheaper to build in a fudge factor than get every bearing's clearance tolerances precise.

I'm no mechanical engineer, but I've re-built a few, and I know how important main bearing tolerances are.

 

Very interesting ... steel caps molded into aluminum girdle, oil flow, and the 2 different part numbers for the four crank bearings. Design flaw? I also think bearing locating tabs are a thing of the past from what I read.

 

All I know is, I’m not too worried. I changed the oil at 900 miles and plan to do it every 5k. I’ve also got the platinum 10 year / 125k mile warranty if anything ever arises. I do like that the car care nut owns an iForce max tundra and gives real world updates on his truck.

 

I did the same, and have the same warranty. I have 26k miles with nos issues and no worries. They claim they will give me a new motor with turbos and all this summer. I will likely have over 30k miles by then....

 

I believe when the core was originally up for sale it didn’t come with any history. This could’ve been solved by a vin search to see what happened and when but I guess that’s gonna be a mystery for all of us.

Yeah not having locator tabs is concerning especially considering how much vibration and thermal expansion happens in those areas. And his video showed the deformed bearing and seized oil rings so I’m really curious about the owners maintenance and driving habits as well because things aren’t adding up but who knows at this point.

 

Great video!

design flaw: 1000
machining debris: 0

Redesign incoming.

 

And from that what is the design flaw?

 

Don’t feed into it. Just another insecure 2nd gen owner who’s here to tell us how superior his engine is.

 

It's my understanding that Ryan got a brand new short block to tear apart and study, so I don't think this was his engine. I could be wrong.

Yeah, this video would have been much more informative with the history of the engine and how it failed. What I can't figure out is what caused the outer diameter of the #1 main bearing to shrink and fit so loosely in the cradle? That doesn't seem consistent with "machining debris".

 

I’m trying to find the part when he said in the video that this particular engine had an event that wasn’t part of the recall. I thought I heard in the video somewhere that something along the lines of it seeming like this event could have been prevented or there was a preventative maintenance mistake.

 

I don't think he ever offered any explanation of what caused this engine to fail. He repeatedly just called it the "event". The #1 piston was missing, so the event was probably related to that cylinder.

One thing is clear, the event may not have been related to the main bearings, but that #1 bearing was on its last leg, and undoubtedly would have failed.

 

Man, did you watch the whole tear down? The failed bearing? Evidence of differences in wear rate and load patterns front to back? If you’re suggesting any of that discoloration from heat (the bluing he talks about) and wear is “normal”, we’ve got a different set of expectations.

 

if it was oil starved wouldn’t the heat generated during the event deform that? Seems like it would

 

Can you point me in the direction of the kool aid stand please?

 

He sorta did, said it was a non-recall event resulting in it being oil starved causing issues to #1 piston. So some info, but not really what happened. Problem is an oil starved engine is going to have significant wear issues, so it’s hard to say what is regular wear and what was caused by the oil issue.

 

nice try at the spin, your improving

but , you said it was a design flaw, I asked what design flaw you saw

and all that shit he saw was from a oil starved and failed motor, so you cant state the bearings were just worn normal and flawed , the event messed up all of that information

 

Random guy on internet says it’s not debris, is a manufacturing issue, but cannot back it up besides pointing to an oil starved engine that wasnt related to the recall. You know being contrary to all existing info without any evidence. Can you point us to the troll cave?

 

There’s ALWAYS one 2nd genner who feels the need to comment! Haha

 

lol, ouch

 

100%, It’s usually the guy who heard from a former roommates friend that lives in his mother’s basement that everyone else is wrong. He may never gotten out of high school but he knows more than the engineers who developed it.

 

I don’t mind the comments and discussions at all, normal truck stuff

plus we get to know what the design flaw is now that whypat says he saw it in the video

 

The last engine I tore down and rebuilt was a 1981 AMC 360 with unknown mileage. The original main bearings, crank, cylinder walls, and valves all looked better than the engine in this video.

Here's the before and after.