Major concern, Turbo damage and start stop feature.

Give it about a year and I am sure someone will come up with a start stop override harness to disable that feature permanently like the F150s have now.

 

Automatic Stop Start. If only we had an acronym for that.

 

Not a fan of these gauges. Bar graphs with varying shades of light grey / white? Not exactly high visibility on a glance.

 

If this annoys you, you may need some therapy.

 

While I'm envious of certain features on the higher trims, I'm a big fan of the (mostly) analog gauge cluster in my SR5 when compared to the all-digital gauge clusters. I've yet to find one that mimics the layout that I prefer, despite the amount of customization offered by them. Just personal preference on my end.

 

Because of EPA regulations and CAFE. If the Auto start stop was used to achieve the EPA emissions certification it has to come on every time the vehicle is started. Same thing for the Fuel economy.

“The EPA generally does not allege conduct to be illegal unless and until the agency has developed a factual basis and decided to pursue an enforcement action. To determine whether conduct amounts to illegal tampering or whether an aftermarket product is an illegal defeat device, the EPA would first need to investigate whether each element of the statutory prohibition has occurred. With regard to a start/stop system, for example, before alleging any violation the EPA would need to determine first whether the manufacturer of the vehicle in question used the start/stop system to comply with the applicable regulations concerning emissions. If so, removing that system or rendering it inoperative may amount to illegal tampering, and aftermarket parts and components that bypass, defeat, or render the system inoperative could amount to illegal defeat devices. To date, the tampering and aftermarket defeat device cases EPA has resolved have generally included the complete removal of filters and catalysts that are essential for controlling emissions of oxides of nitrogen, particulate matter, and other tailpipe pollutants.”

So basically since they are achieving the emissions with the start stop system and probably the CAFE numbers as well it can't be something that has to be turned on. It has to default to on.

 

Dadgum G.... uh, nevermind!

Makes sense. Still don't like it.

 

Slip the tranny into neutral just as u stop and the engine will not shut off

 

really surprising that this is in the owners manual. No turbos (especially water cooled ones) in the last 15yrs have needed to idle before being shut down, even after heavy use. The design of the cooling and the synthetic oil make sure of that.

 

The 5.7 is much more purpose built than that by far.

 

The 5.7L is just a tall deck 1UR.

Nothing special.

 

Have you read through the part list for it? Completely over built and the reason they last so long.

 

Yeah I’m familiar with. Still nothing particularly special as Toyota engines go.

Just a 1UR-FE with a taller deck height for added stroke and displacement.

 

Again.... Still over built. The link posted above doesn't really go into depth about the new v6tt.
'integrated main bearings' seems like a miss.

 

I don’t have a dog in the fight, have you read any of @Coal Dragger ’s other posts. I don’t know what the hell he is talking about half the time, but I would bank on him knowing his shit.

 

Integrated main bearings?

I read through that page again, I think I might have been the first to post it here so not new to me.

I failed to find a section addressing bearing shells being integrated into anything. Now the crankcase main bearing caps are integrated into a rigid casting that mounts to the bottom of the engine block, which is awesome if you want the strongest bottom end foundation possible to support a crankshaft. If you have an application that needs to withstand high thrust loads from the connecting rods and ultimately pistons that are seeing high cylinder pressures, a strong, rigid, and fully supported main bearing cap is exactly what you want. This also has advantages in keeping the cylinder block shored up and dimensionally accurate under load.

You will also encounter similar engineering in high performance and race engines where a crankshaft needs to be supported under very high RPM. It’s not a cheap way to build a bottom end because the whole girdle has to be perfect, probably gets extra machine time to align hone the whole assembly. However if you want maximum strength it’s probably the best solution anywhere on an in-line or V engine block.

 

But are they chromoly forged or poured tensile?

 

The caps themselves?

I am not privy to that information, I will assume that the cap material is steel like any other main bearing cap, whether the caps are forged, machined billet, or machined castings I have no way to know. My guess is they’re machined from a casting to save money but that is very much a guess.

How Toyota or other manufacturers manage to cast the aluminum girdle around the caps and keep everything aligned, deal with galvanic corrosion issues/dissimilar metals etc is beyond my knowledge.

There is a chance the entire bottom end main cap/girdle assembly is aluminum. Hard to tell from the renderings on the cited web page.

 

I cant think of a lot of scenarios where you would be traveling at freeway speeds and then immediately slam on the brakes and stop.

if you are traveling at speed you are likely going to coast down some distance, the whole time coolant is passing through the turbos along with oil, pulling out heat.

 

Traveling at freeway speeds and immediately slam on the brakes and stop AND THEN shut the truck off and walk away.

 

Or the truck shuts itself off.

 

Ha! I keep forgetting about that nifty feature. My wife’s VW has it, and it’s instinct to mash the off button every time I hop in.

 

At least they still offer an off button. Lots of cars don't have one.

 

New worry... Excess brake pressure when stopped will only lend to pad material transfer to the rotors. Interesting to see if we hear about lots of 'warpped' rotors.

 

You're right. Missed caps

 

You don’t drive I70 in Colorado very often then 65-0-90 is a regular occurrence.

 

This is a good point that applies to some of my local interstates as well. I’ll have to walk back my earlier sarcasm a bit…

 

No problem.

Also I’m not shitting on the 3UR-FE I’ve owned one for 15 years now and it’s a stout piece of equipment that hasn’t let me down.

If you look at Toyota’s philosophy on engine building though, you’ll see a pattern of overbuilding even the 4 cylinder passenger car engines.

 

My first impression is that with water cooled turbos and synthetic oil (that is thermally managed as well) this won't be an issue.