All I would say is to take it to Toyota to look at. Maybe that will alleviate some of the mental stress. I'm not happy about it but...I get that production errors happen in the first year. The worst part is the customer service timeline to get things finalized. The dealership has been amazing though.
Thank you, this makes so much sense and explains why it only sounds like this at cold start. I’m much more comfortable now.
are you? Because that same sound was tracked down to my engine cylinder 1 issue. engine torn down in pics on post 1. I'd say taking it to your dealer to have them diagnose it would be a better option.
That is why I think the blowoff valve is more likely to cause an exhaust leak like sound, in comparison to wastegate valve. The noise from the waste gate should be more insulated since it diverts flow to/from the exhaust.
Any theories as to why cylinder #1 ?? Guess will know more after Toyota engineer has a look?
"the engineer removed fuel from each cylinder to locate which cylinder the noise was coming from. When removing fuel from cylinder 1 the noise went away. This lead to a total tear down of the engine (in pictures). The engineer is thinking bad universal bearing in the block. There were metal shavings in the oil as well. They are waiting for Toyota corporate to send someone out to verify the findings." --from post 1 that I updated.
I really hope this ends up well for you. I hope it’s not as bad in the end as it sounds currently- for yours & everyone else’s sake and sanity.
I was told that when the engine heats up that metal expands cleans up the slop essentially. I'm no engine mechanic but just relaying here. And yes. I'm pretty sure it's the rod bearing.
weird that it says "uphill". I wonder if that's a gravity fuel delivery thing. though you'd think the spray would be pressurized enough to account for that.
Maybe have to do with engine load and not fuel delivery.
I think they just listed most common conditions for the engine RPM to be high (going up hill and accelerating).
Should everything expand proportionally though? I know metal expansions can cover up manifold leaks, but that is because manifold and the engine block are at different temperatures. Cylinder wall and piston should be at the same temperature.
That's actually a great idea wonder if anyone with a Tacoma iforcemax could confirm. Follow up to that would be... are the engines made in same plant.
No, LC is made in Japan. Tacoma is made in Texas or Mexico.
The Tacoma is made in the Baja plant. I believe the majority of the engines for the Tacoma are built in Alabama.
Thanks. So, then another possible angle to explore is does a Tahara plant produced LC make the same sound as the Hino / Hamura ones.
