BRZ Battery died, when I tried starting it it made a terrible noise.

[Apoc]

Originally Posted by nycbrz

Not very smart to bring it to dealer with non oem parts. they can deny your warranty easily

They can't unless they can prove it caused the issue.

[wparsons]

Originally Posted by gramicci101

You'd have to over-rev the shit out of it to do that, and I don't think the starter is that powerful. I'm glad they're replacing it under warranty though.

I would expect a floated valve or few LONG before a piston leaves the block if it was over revved.

[cmspooner]

Well I finally got to see the engine of the BRZ when I dropped off my summer wheels at the Subaru dealership. We're still waiting for gaskets to come in.

It turns out that a piston hit a valve and caused the piston to explode, bending the rod and messing everything else up.






The metal chunks are what is left of the piston and valves.

[Dipstik-sportech]

Judging by that damage that was over revved by possibly someone missing a shift..... No way that happened at idle, we're not getting the real story

The Frozen North

[cmspooner]

You and subaru agree; but I am telling the truth. You can see from the original post that I didn't think anything major happened.

[cmspooner]

Sorry to double post but I did give it gas when it didn't start up right away; a bad habit from driving old German cars.

[FreshFRS]

it looks like a massive over-rev, but giving you the benefit of the doubt, giving it a little gas when starting isn't going to cause this type of damage. i mean its definitely a bad habit but it at worst would push the engine to its rev limiter.

I have a total guess, i don't know if it's even possible, but could one of the Cam phasing Solenoids malfunctioned and kept a valve or 2 open long enough to slap the piston repeatedly during startup?

[BRZnut]

so let me get this right, the engine self destructed during a jump start??? Are these engines that flimsy????

[wparsons]

Originally Posted by Dipstik-sportech

Judging by that damage that was over revved by possibly someone missing a shift..... No way that happened at idle, we're not getting the real story

The Frozen North

A missed shift wouldn't over rev like that, the rev limiter would still stop it. The only way to over rev it enough would be to downshift instead of upshifting (ie hit 3rd from 4th instead of 5th), or downshift at too high of revs.

Originally Posted by BRZnut

so let me get this right, the engine self destructed during a jump start??? Are these engines that flimsy????

ANY engine will blow apart if you smash a piston into a valve, regardless of why they hit.

I think the idea of the AVCS failing would be worth pursuing. There's not enough range of adjustment to allow a piston to hit a valve, but if something broke and it was way outside the normal range then it's entirely possible this happened at very low RPM.

[Dipstik-sportech]

That's what I meant by missed shift, the old 1-2-1 lol. I just can't see that kind of destruction happening at idle.

The Frozen North

[celica73]

at least the DI seal on the pictured injector is in good shape! Ya have that going for you.

Sometimes things break, I'm not judging, could be one of many things. Glad they are fixing it for you!

[Hawaiian]

Originally Posted by cmspooner

Looks Good!
-JV

[xwd]

Originally Posted by BRZnut

so let me get this right, the engine self destructed during a jump start??? Are these engines that flimsy????

Did you read the original post? Is this is a serious question? Obviously something mechanical broke and caused valve/piston contact, and then it's all she wrote.

[stugray]

Originally Posted by cmspooner

Well I finally got to see the engine of the BRZ when I dropped off my summer wheels at the Subaru dealership. We're still waiting for gaskets to come in.

It turns out that a piston hit a valve and caused the piston to explode, bending the rod and messing everything else up.






The metal chunks are what is left of the piston and valves.

I am sorry, but that damage did NOT occur in a couple of seconds at idle.
You can clearly see that something hit the head what appears to be thousands of times.
Lets see. Even if idle is high (1500 RPM) based on that pic you let it run "like ball bearings in a blender" for a FEW MINUTES?

The only explanation is that the trouble was occurring before you shut off the car, but you didnt notice until trying to restart it.

Any chance someone else dove the car before you tried to jumpstart it?
Maybe that person left something on and drained the battery too.

And for a piston to hit a valve, the timing chain must have come off or broken.
If an engineer designed an engine that can vary the valve timing enough in software to contact a piston, then they should be fired (it's called fault tolerance)

Oh and the dealer is "waiting for gaskets to come in"?
Sounds like they are rebuilding it?

I would demand to get a completely new long block.
No way I would let them rebuild it after that.

If they DID rebuild it, I would make sure to destroy it again to force them to replace it.

There is no way the lower end of that engine is sound after taking a beating like that.