The motor in the trucks is beefed up to handle the heavy duty cycle of trucks and cannot be compared directly to the car platform engines. Apparently about 50% of the parts are different.
Hearing a rattle noise at low gear acceleration.
- Thread starter ryroam250
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The problem is a T24A- FTS should be the same internally whether it’s in a car or a truck. The externals can be different. If the internals change between car and truck then the FTS should change also.
Should may differ from actually do...
The changes can absolutely make a difference in sound profile. The truck engine is using 50% new parts, is in a different orientation, and is built to a much higher load standard.
Listen to this interview with the Toyota VP of engineering starting around 56:00
More information has come out reported directly from Toyota. The V35A-FTS had the main bearing redesigned. We were told engine debris.. IMO it was both a design and manufacturing problem combined.
The T24A-FTS will also see a redesign.
Read through it twice, keep missing the part where it says there's an issue with the 4cyl Engine. I'll grab my tinfoil hat and try again...
The sky could be falling, we could be under attack by aliens, and I STILL CANNOT WATCH THAT GUY’S CONTENT..
The V35A main bearing originally didn’t have a resin coating. Just about every Toyota engine including the T24A has a resin coating on the bearings. The T24A doesn’t need a bearing redesign.
For everyone following along let's hope my engine issues were just a one off situation. At the very least if you are having "piston slap noises" test your oil. Some of the T24A-FTS's did not make it out of the factory without issues. I still believe there has been redesign to the main bearings for the T24A-FTS.
If Toyota or the dealership tries to tell you this noise is normal... be skeptical.
If Toyota or the dealership tries to tell you this noise is normal... be skeptical.
I wonder if the land cruisers being built today still make the noise. They probably still do.
Toyota Recalls Certain 2024 Toyota Tundra Vehicles - Toyota USA Newsroom
PLANO, Texas (May 20, 2026) — Toyota is conducting a safety recall involving certain model year 2024 Toyota Tundra non-hybrid vehicles in North America and Latin America countries. Approximately 44,000 vehicles are involved in this recall in the U.S. There is […]
pressroom.toyota.com
Toyota recently performed a full engine tear down on my 2024 First Edition which has had an engine knock when warming up from a cold start, btw 1500-2500 RPM since I got the car.
After the Toyota service department initially dismissed it as normal engine performance on the first couple of visits, they eventually acknowledged this was an issue when I persisted in mentioning this noise every service appt over last ~18 mos. Truck has only ~11000 miles.
They found bearing material in the oil, and excessive play on connecting rods 1 + 2, plus delaminated bearings. Proposed resolution was to replace short block, turbo, oil cooler, oil pump, some other lower end components, and then putting it all back together. They declined to replace any other engine parts.
Overall a very disappointing saga and outcome. I've only just gotten car back - I have not heard the noise, but still attempting to verify the fix.
After the Toyota service department initially dismissed it as normal engine performance on the first couple of visits, they eventually acknowledged this was an issue when I persisted in mentioning this noise every service appt over last ~18 mos. Truck has only ~11000 miles.
They found bearing material in the oil, and excessive play on connecting rods 1 + 2, plus delaminated bearings. Proposed resolution was to replace short block, turbo, oil cooler, oil pump, some other lower end components, and then putting it all back together. They declined to replace any other engine parts.
Overall a very disappointing saga and outcome. I've only just gotten car back - I have not heard the noise, but still attempting to verify the fix.
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Has anyone else undergone this or another fix for this issue? I know there were many mentions / videos of this particular noise on this thread and several others on this forum. Would be curious to hear about your experience(s) if so.
That’s not going to be good if all the vehicles with the noise are in need of an engine replacement. I know some have had an engine replacement from a specific problem. To have loose con rods and no noise all the time is odd IMO.
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Thanks for posting an update. There are few of us actually posting meaningful information on this thread.
I was offered the same fix and with no assurance from Toyota that it would even resolve the issue. Toyota redesigned the main bearings and there will be more failures later down the road probably outside of the warranty.
As you can see from my oil testing the main bearings were coming apart and destroying the engine. I was given the same story from FTS, Corporate and the dealership. That all changed when I went a different route and I no longer have the vehicle… there was no way I was going to take that risk and with Toyota in full denial mode, given the recent manufacturing issues. They honestly don’t care.
I think this is also related to bearing material change that was done on the V6 around the same time.
You are first on this thread that actually went through with the short block replacement… hopefully others will post if they have as well.
As far as it actually fixing the problem only time will tell… I think they are scrambling behind the scenes and really hoping the T24A doesn’t have the same failure rate as the V6. Remember Toyota was fully aware of this August 2024. You would have 100% received the redesign, but remember even after the update to the V6 we saw failures.
Good luck and it’s really unfortunate this is what Toyota has become. No one deserves this from manufacturer built on quality and dependability.
I asked the head tech same question when picking up the car from the service dept. He cited metal expansion as the engine warms up as the reason the noise would go away. I'm no mechanic, just sharing what they said...
Yea that don’t make any sense to me. A loose rod won’t hold together. The noise on mine sounds nothing like loose rods. The noise isn’t there or can barely be heard when the vehicle is first started. When the vehicle warms up just a bit it’s easily noticeable.
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Anyone gotten an update on where the noise is truly coming from. I remember many folks hearing the rattle. I’m wondering if cruisers built now still have the sound. Is it possible the sound is from the D-4ST system.
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