Supercharged E90 M3 engine kaput on highway

[NiBe]

Hi,

found this on YT (17:00 is the part of the video):

What do you think the root cause is?

Pretty good footage of the "engine kaput" moment

[darren p.]

doesn't appear to be rod bearings...

[Soden82]

Idk but that black series is a bucket list car.

[NiBe]

I think it is a blown head gasket

[amrazM]

theres gonna be a hole in the block nearest the back cylinder. when you wanna do hits on this car back to back to back those rear cylinders get hot fast.

[NiBe]

if anyone is interested here is the continuation. They show what happened to the car at 5:30.

[kolosy]

Originally Posted by NiBe

if anyone is interested here is the continuation. They show what happened to the car at 5:30.

i'm glad he's concerned about the important mods. like that the valve covers match the brake calipers.

[GORDON.M3]

Originally Posted by NiBe

Hi,

found this on YT (17:00 is the part of the video):

What do you think the root cause is?

Pretty good footage of the "engine kaput" moment

they abused the living shit out of that car though, so I'm not surprised it blew up.

[gh0stE92M3]

I wonder if they did an engine break in procedure? Seems like they put it back together and went straight to the dyno and ripped on it. It’ll be interesting on how long this motors gonna last.

[NeverL8]

Main bearing #1 and took out rods with it. Superchargers put a lot of pressure on those mains

[drwankel]

Originally Posted by NeverL8

Main bearing #1 and took out rods with it. Superchargers put a lot of pressure on those mains

This is my biggest fear about being supercharged. Putting more pressure on mains in a car that already has bearing clearance issues.

The good news, is this car is a 16 year old now, and there are a ton of people running superchargers these days. Main bearing failures seem to be rather rare. I expected it to be more of a thing over the years and it just wasn't.

[E92Bean]

Originally Posted by drwankel

This is my biggest fear about being supercharged. Putting more pressure on mains in a car that already has bearing clearance issues.

The good news, is this car is a 16 year old now, and there are a ton of people running superchargers these days. Main bearing failures seem to be rather rare. I expected it to be more of a thing over the years and it just wasn't.

To be fair, the owner states the main bearing went as a result of over-revving the engine. He swapped to shorter gears with a lower top speed, and sat at the limiter WOT.

[drwankel]

Originally Posted by E92Bean

To be fair, the owner states the main bearing went as a result of over-revving the engine. He swapped to shorter gears with a lower top speed, and sat at the limiter WOT.

Yep, and this is one of those rare examples of a main failure. You can break anything if you try hard enough.