Blown motors, S65 failure registry - v2, failures catorgorised

Confirmed, main bearing #1 failure. The bearing didn't even spin, but the block is cracked at the oil port all the way up to the bores. Terrifying considering the engine ran perfectly fine and didn't have much of a noise besides a slight knock.

ab987 wrote

Confirmed, main bearing #1 failure. The bearing didn't even spin, but the block is cracked at the oil port all the way up to the bores. Terrifying considering the engine ran perfectly fine and didn't have much of a noise besides a slight knock.

Damn, sorry to hear that, RIP another S65 .
I'll add your case to the mains failure list.

Assimilator1 wrote

Damn, sorry to hear that, RIP another S65 .
I'll add your case to the mains failure list.

=> https://www.m3post.com/forums/showthread.php?t=2107450

Can you make this list a spreadsheet (google doc?) so one can sort by year, mileage, bearing version, etc?

I'm afraid I don't have a clue how to.
Can't you copy and paste the op to achieve that?

///M Power-Belgium wrote

=> https://www.m3post.com/forums/showthread.php?t=2107450

Adding another one to this list, my replacement engine has a cracked crown/ringland on cylinder #3.

ab987 wrote

Adding another one to this list, my replacement engine has a cracked crown/ringland on cylinder #3

I'm sorry to hear this mate ..

ab987 wrote

Adding another one to this list, my replacement engine has a cracked crown/ringland on cylinder #3.

No way!
I don't suppose you can use a piston from the other engine?

Thanks for LMK anyway (btw, do you know what year and miles its done?).

Assimilator1 wrote

No way!
I don't suppose you can use a piston from the other engine?

Thanks for LMK anyway (btw, do you know what year and miles its done?).

2011 with 94k miles

ab987 wrote

2011 with 94k miles

Ta
Added to 'Other causes' list.

M3 UK 103k miles. Not supercharged. Engine went for rocket gasket and found r/h vanoss exhaust spring not in the correct position (unknown reason). Both vanos covers where missing. On the l/h found both cracked.
Found them on the sump and plastic particles found on rod bearings too. Engine requires rebuild.

It didn't blow up but it was close to.



https://www.m3post.com/forums/showthread.php?t=2114569

Thanks for the heads up, will add your case to the list when I've read more about it.
Sorry to hear about your engine trouble btw .

Out of curiosity, are you a member at m3cutters too? (a UK M3 forum). If you haven't yet found a place to sort out your engine or a replacement, some people there will probably be able to recommend someone.

Assimilator1 wrote

Thanks for the heads up, will add your case to the list when I've read more about it.
Sorry to hear about your engine trouble btw .

Out of curiosity, are you a member at m3cutters too? (a UK M3 forum). If you haven't yet found a place to sort out your engine or a replacement, some people there will probably be able to recommend someone.

No, I'm not. I found a place that gives quite a lot of warranty (2years or 20k miles) called selected Motorsport that looks like they did quite a few engines already too. I asked the usual like hacks etc but or is almost impossible to contact with them or they don't want to job at all. But I will ask anyway, thank you!!

Updated the list, added 8lueM3's case.

(Hmm, I see I still need to look into fernando155's case......)

fernando155 wrote

M3 UK 103k miles. Not supercharged. Engine went for rocket gasket and found r/h vanoss exhaust spring not in the correct position (unknown reason). Both vanos covers where missing. On the l/h found both cracked.
Found them on the sump and plastic particles found on rod bearings too. Engine requires rebuild.

It didn't blow up but it was close to.

https://www.m3post.com/forums/showthread.php?t=2114569

I see from the other thread that the metal was down to a VANOS spring rubbing the front cover.

Btw, what year is the car?

Johnny E92 wrote

This guy on YouTube just a big engine failure too

Looks like I forgot about this case.he shows that a piston has broken up and the rod out of place. In his next video he shows the big end of the rod broken off in pieces, but itslooks clean!
Looks to me like a rod bolt worked loose (or less likely, broke).
In his last update about the car (that I could find) 6 months ago, he talks only about getting a replacement engine. So we're not likely to find a certain cause for the failure.

And as Spammy mentioned, no8 has some.

Added to undetermined/uncertain list.

Assimilator1 Matt at REPerformance had his engine melt pistons whilst on a trip to visit the Ring. Incident didn’t happen on track. They just did a video on it for YouTube a couple days ago.

Thanks for the heads, nice one:cool!:

They posted an update today. The engine is completely scrapped. Piston was destroyed to the point where there was only a rod and pin in the cylinder.

Ah yea, I did see that, so they believe that a weak mixture melted the piston over time, then a piece of the piston broke off breaking a valve and entirely destroying the piston.
They state that no EML illuminated for the weak mixture (which would be concerning for all of us!).

That explanation for the piston breaking up seems odd to me.
I would've thought that if indeed there's a marginally weak mixture (enough to cause damage) then the piston would be slowly eroded/melted until either the piston is holed and compression lost, or piston lands melted and compression lost.
But my experience/knowledge with engines failing in this manor is limited, am I missing more unusual failures?

spammysammich wrote

They posted an update today. The engine is completely scrapped. Piston was destroyed to the point where there was only a rod and pin in the cylinder.

Now added to the list, in the 'other' failures list.

Assimilator1 wrote

Now added to the list, in the 'other' failures list.

My guess would be a dropped valve due to valve spring failure like I’ve seen on a Subaru.