Blown engine

I am guessing Toyota would step up on this for you should it occur. There are enough of these reports that it is concerning to me, but I’ve developed an admitted bias against the 3rd Gen and how Toyota has handled early problems when trucks have been sidelined.

As pointed out by others if this were considered as a percentage of trucks in service, it’s not a huge problem for the vast majority of owners.

 

Know owners well of our local Toyota dealership and trust me, Toyota isn’t much better with their current trucks. We can all cherry pick bad stories of every brand.

 

Might have had trash on that bearing if rest were good.

 

Would anyone be surprised if the reason for so much shoddy product could be as simple as the manufacturers no longer giving a monkeys about ICE vehicles? They know their days are numbered, tooling up for electric will make a huge dent in their bottom line, from their point of view better to get the electric running properly and hope to lean on the glory days past for repeat business than put valuable R&D into a vehicle that will be obsolete in ten years (if hype is to be believed). Obviously you have to put enough in to keep up with the hordes baying for more electronic whizz-bangs but do you really want to go all in, after all if you want to be number 1 you don't need to be perfect you just need to be slightly better than the competition.
People tend to forget fairly quickly short term hiccups, you only have to look at the Datsun example - a reasonable looking stable, for the time, reliable, for the time, but you only had to sneeze on them and the blasted things would rust through. Sort out the rust issues, brush the Datsun name under the carpet and call yourself Nissan and hey presto...

 

So this goes back to the wonderful debate of how soon should one change the oil for the first time...500 miles? 1k? 2k? Etc?
Would this even help is the next question...

 

Good question but almost impossible to answer because we don’t know the cause of the failures yet. Change at a thousand then every five if you want to be proactive. If it is manufacturing debris which was mentioned earlier in this thread, we still don’t know enough about the debris to make meaningful changes in our trucks. Maybe the facts will leak out some day but I doubt Toyota will volunteer that info unless the failure rate gets really high and they issue a recall, extended warranty or other campaign. I want to believe Toyota will make it right if it becomes a widespread problem. In the meantime enjoy your truck.

 

The obsession with eliminating ICE vehicles is a fool’s errand.

All it will accomplish is forcing people to keep older ICE vehicles in service way way longer than normal because EV’s will be too expensive, and still have too many limitations for many people.

 

Unfortunately just because a lot of us agree with your sentiments doesn't mean manufacturers will go fighting each other to produce future decent ICE vehicles.

 

Then they will go out of business as their products will be too expensive to buy and sales revenue will not support their business models.

 

So the blocks themselves are likely not being processed correctly post machining, and metal shavings that should have been cleaned out are making their way into oil passages and clogging them?

For crying out loud thoroughly cleaning out an engine block after machine work is some pretty well understood basic stuff.

 

Manufacturers won't make it through to an EV conversion without the earnings from ICE sales so they'd better keep their old school customers happy until EV's start delivering on the bottom line (which could be never). They are getting killed on EV's in both capital costs and operating margin.

 

Oh heck yes, toyota needs to take a lesson and offer the 5.7 in a tacoma, I would return LOL.

 

A lot of old school car guys like myself do change the oil after the first couple of thousand miles on a new motor just to get any manfacturing debris out of the engine, it should not be necessary to do this but here we are.

 

Which is why my post makes sense. The part that nails the coffin shut is the staying ahead of the big 3, who are also looking to get ahead in the EV market.
Economics might not have been a fun subject in school but it did leave some remnants behind in my memory. Everyone bangs on about cost, which is a very reasonable concern, especially here in the States where the consumer seems to pay considerably more for like-for-like vehicles than they do in Europe.
Cast your minds back to the first ICE vehicles, the first landline phones, the first mobile phones, the first personal computers, the first vacationers to Italy or the even just the first people to vacation using air travel. Notice that there is one common user type among all of those, the rest of us in the past have had to whistle for a while.
It's funny that I brought this up because while checking out the headlines on the front of the major news corporations websites when I turned in about 15 minutes later last night I noticed that CNN was leading with a story on the effects car loans are having on the US general public. The upshot is that more people are already getting squeezed out of the car market by high prices and loan conditions. So why, I ask myself, would things be any different when it comes to EV's?

 

I, Spraynard, also think feel this is a vendor QA issue rather than an in-house failure of the quality policy.

Fun Fact: my outfit gets the living daylights audited out of it by our customers and regulatory agencies on site. In 2020 through the 1st half of 2022, nobody showed up. It was all Zoom/Teams virtual bullshit and fill-out-this-questionnaire.

I could've sold shit to a dairy farmer during that time but we, and especially I, do not tolerate obfuscation.

 

I didn’t pay any adm or add ons, depends on where you are I guess

 

That LS3 is taking up about as much engine bay space as practical. I own a 3UR-FE and an LS3 and the LS3 is much much more compact in comparison. The DOHC cylinder heads on the 3UR-FE do not help packaging efficiency at all.

 

The 7.3 also has not been all bliss. Lifters and camshafts are delaminating at 30-40k miles. https://m.youtube.com/watch?v=VdODNCV1dis&pp=ygUaZm9yZCA3LjMgZ29kemlsbGEgZmFpbHVyZSA=

 

Don't think it's possible to fully clean the engine. I hot tanked two engines (non-Toyota) with forced air induction in all oil and coolant channels, taking parts out from time to time and washing the channels with clean water. The cylinder block and the head were boiling separately, for about 6 hours each. Upon reassembly still saw carbon chunks falling off from the channel openings. Metal shavings in the engine will remain there and accelerate bearings and shafts wear.

 

I would switch immediately to a thicker oil. Spun bearing is oil starvation. Could be the truck operates at insufficient oil pressure levels in some modes, or 0w20 oil is too thin in maximum power mode and allows metal to metal contact. Thicker oil will help with that.

 

However, if the clearances are tight then a more viscous oil will exacerbate the problem at start up and low engine temps..

 

You have to scrub the passages, and all other surfaces to do it right.

https://www.speedwaymotors.com/Engi...2XHD9EmPH8pGfBh1HnBcA_WmJYCrbYQxoCpksQAvD_BwE

Simple brush kit, hot soapy water, and elbow grease followed by generous amounts of WD-40.

 

No. Oil viscosity differs thousands of times in 0F and 200F, yet the engine is fine in the whole range of the temp.



See how little is the difference between 0w20 and 5w30 in warm temps? 75 C on the right is not even operational temperature. Oil passages must let oil flow at any temperature (while the oil is liquid).

 

You are probably much better versed than I am in oil behaviour so I shall assume that your posting is correct, but if I understand it correctly a shell must maintain a coat of oil to prevent spinning, it is after all the friction between metal and metal that result in a spin up which the oil is supposed to prevent. If a shell is drying up because of inefficient oil delivery system due to smaller tolerances would not a more viscous oil have greater problems maintaining surface tension than a lower viscosity?

 

Higher viscosity gives a better protection during start, when oil flow is not established yet everywhere in the system. There's not a single reason why 0w40 would be worse than 0w20 in this engine, besides pump losses and worse MPG.

 

That’s pretty much what I have been told, or the debris make it directly to the bearing. This can explain why the other bearings have no damage and it can fail randomly with no other signs. Hopefully the numbers stay low and eventually this issue diminishes.

 

I still think these main failures are from Oil not meeting spec. You’d have some early failures. These are all after 1-3 oil changes.
If it was debris - there’d be cam bearings or other bearings failing. We all know dealerships don’t carry the correct oil - it’s bought in bulk and cheapest available.

These engines are extremely high tolerance, high torque. More stress on those mains than anything Toyota has made recently, you could get away with crap oil in a 5.7L for 300K plus miles, not anymore. Low quality oil just wont have the surface tension to withstand the torque in the twin turbo. The first main bearing that loses oil tension will be damaged and the engine is toast. To me, these failures seem to be from bad oil. It’s the same failure type you see when guys boost their diesels too much, the torque exceeds the oils ability to surface tension. Just 1 bearing usually drops first. Maybe I’m wrong and it is debris or bad bearings from Toyota but I still highly doubt it. The days of robust and way over engineered are over.

 

So Ford can engineer a forced induction V6 that survives variable oil quality at Ford dealers, but Toyota can’t?

I think you’re incorrect here. If these were oil related failures every bearing would look like hammered out dog shit too.