Apex F80 M3 Blown Up S55

Robin_NL · 10-16-2021, 03:47 AM

Interesting.

From 18:21 on....

(I'm getting my preventive crank hub fix nov 1st.)

Cheers
Robin

Niart906 · 10-16-2021, 07:06 AM

Interestingly, it wasn't the crank hub that let go. The #5 cylinder wall developed a hairline crack and was letting coolant into the combustion chamber.

ofer1353 · 10-16-2021, 02:43 PM

Crank hub fix wouldn’t do anything for this.

Also, I doubt you are using your S55 to the same level that they are. I would not look much into the failure of a block that is extensively used on a racetrack with pretty extreme duty cycles.

Wanted_M · 10-16-2021, 02:51 PM

Second motor to fail around 35k mark..

mdrobc13 · 10-17-2021, 10:23 PM

So what is the repair? New motor? Core exchange? Cost? Specialty repair from what I can tell you are saying....back to BMW to fix?

hellokitty · 10-18-2021, 12:03 AM

Quote:

Originally Posted by mdrobc13

So what is the repair? New motor? Core exchange? Cost? Specialty repair from what I can tell you are saying....back to BMW to fix?

they said in the video that they were dropping in a new motor and salvaging what they can from the old motor to use as spare parts and keychains lol

Peter_2jz · 10-18-2021, 04:11 AM

Strange place the motor let go , #5 cylinder wall has a hairline crack in it? What could have caused it ?

Does anyone know of similar cases with other S55's ?

hellokitty · 10-18-2021, 09:20 AM

Quote:

Originally Posted by Peter_2jz

Strange place the motor let go , #5 cylinder wall has a hairline crack in it? What could have caused it ?

Does anyone know of similar cases with other S55's ?

A few hundred laps around the ring and a 500-550hp tune caused it lol…

That's why race teams occasionally rebuild their engines I guess

rmanm4 · 10-18-2021, 10:30 AM

This is not common on a closed deck engine like the S55. The whole purpose for a closed deck block is to strengthen the walls.

White340 · 10-18-2021, 10:41 AM

35k on a motor running at full rpm 70% of the time seems pretty good.

x.shell · 10-18-2021, 10:46 AM

This is their 3rd S55 motor. They've averaged about 35,000 kilometers (21,748 miles).

They've only replaced the motors with used power plants; not new.

This was not a crank hub issue. They hairline cracked the block.

The M6 GT3 cars also average 30,000 - 35,000 kilometers on their race driven motors.

Most of us are not running our cars like they do.

///Msports180 · 10-20-2021, 03:57 AM

The old saying used to be 100kms on the race track is a 1000kms on the road, they have done 35,000kms on the ring, so possibly 1500+ laps at 500+hp. I reckon that is pretty damn impressive for a factory engine.

maddmatth · 10-20-2021, 04:20 AM

35000km of nearly all full speed Nordshleife miles. Remember this car is mostly driven flat-out by professionals and runs 500-550hp tunes. In an engine that wasn't brand new to begin with.

You are NOT putting anywhere near the same level of stress on your engine with the occasional trackday and canyon blast

I wonder if it would be more economical for them to do a rebuild at 25000km or so rather than keep buying new engines. Not sure if a rebuild helps when it's the block cracking though?

Peter_2jz · 10-21-2021, 11:15 AM

Can anyone advise if the crack in the cylinder wall can be welded ?

Just curious

Spun Pornhub · 10-21-2021, 11:30 AM

the crack looks to be a very minor issue from numerous high heat cycles. if anyone paid attention, the owner mentioned that they could have continued to drive on the engine without major issues but they decided to pull it for a tear down to be extra safe.

the physical cylinder wall itself is 100% ok. it's only the LDS coating that developed a hairline crack which has minimal impact on the block's structural integrity. the engine can be salvaged by an experienced machine shop using cylinder sleeves in place of the LDS coating.

swagon · 10-22-2021, 04:49 AM

Quote:

Originally Posted by Spun Pornhub

the crack looks to be a very minor issue from numerous high heat cycles. if anyone paid attention, the owner mentioned that they could have continued to drive on the engine without major issues but they decided to pull it for a tear down to be extra safe.

the physical cylinder wall itself is 100% ok. it's only the LDS coating that developed a hairline crack which has minimal impact on the block's structural integrity. the engine can be salvaged by an experienced machine shop using cylinder sleeves in place of the LDS coating.

What a username lol

10-16-2021, 03:47 AM	#1
Robin_NL S0THPAW 8716 Rep 7,846 Posts Drives: HS M2 Competition Join Date: Apr 2005 Location: The Netherlands iTrader: (0)	Apex F80 M3 Blown Up S55 Interesting. From 18:21 on.... (I'm getting my preventive crank hub fix nov 1st.) Cheers Robin
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10-16-2021, 07:06 AM	#2
Niart906 First Lieutenant 179 Rep 331 Posts Drives: 2017 M3, 2003 M3 Join Date: Feb 2015 Location: Dalton, PA iTrader: (0)	Interestingly, it wasn't the crank hub that let go. The #5 cylinder wall developed a hairline crack and was letting coolant into the combustion chamber. __________________ 2017 F80 M3 - Mineral White/Amaro Brown 2003 E46 M3 - Jet Black/Cinnamon
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10-16-2021, 02:43 PM	#3
ofer1353 Private 45 Rep 81 Posts Drives: 2018 M3 ZCP, 2022 X5 45e Join Date: Dec 2020 Location: IL, USA iTrader: (1)	Crank hub fix wouldn’t do anything for this. Also, I doubt you are using your S55 to the same level that they are. I would not look much into the failure of a block that is extensively used on a racetrack with pretty extreme duty cycles.
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10-16-2021, 02:51 PM	#4
Wanted_M Captain 756 Rep 946 Posts Drives: Frozen Blue M4CS Join Date: Jul 2009 Location: Norcal iTrader: (2)	Second motor to fail around 35k mark.. __________________ M4CS Frozen Blue ARM DP's/Resonated Mid-pipe \| SPL links \| Hotchkis bars \| JRZ RS2/camber plates \| K&N \| Koyorad HX \| Powerflex purple \| Rouge \| Spiegler \| Speed Eng. snorkel \| Vargas CBC/hub \| Wagner IC \| xHP \| Xpel stealth ppf
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10-17-2021, 10:23 PM	#5
mdrobc13 Colonel 338 Rep 2,232 Posts Drives: Made in Bavaria Join Date: Oct 2007 Location: On a base somewhere near or afar! iTrader: (8) Garage List 2021 BMW X3e [0.00] 2016 BMW M4 [9.00]	So what is the repair? New motor? Core exchange? Cost? Specialty repair from what I can tell you are saying....back to BMW to fix? __________________ '22 BMW M4 Comp (SSG/Black) '16 BMW M4 (Shakir Orange/Black) - gone not forgotten '15 BMW M3 (Black/Black) - gone not forgotten '10 BMW X5M (Black/Black) - gone not forgotten '08 BMW M3 (Space Gray/Black) - gone not forgotten
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10-18-2021, 04:11 AM	#7
Peter_2jz New Member 5 Rep 12 Posts Drives: 15' F82 M4 Join Date: Apr 2021 Location: Europe , Bulgaria , Sofia iTrader: (0)	Strange place the motor let go , #5 cylinder wall has a hairline crack in it? What could have caused it ? Does anyone know of similar cases with other S55's ?
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10-18-2021, 10:30 AM	#9
rmanm4 Lieutenant 871 Rep 433 Posts Drives: BMW M4 F82 Join Date: Apr 2021 Location: Toronto iTrader: (0) Garage List 2020 BMW M4 [0.00]	This is not common on a closed deck engine like the S55. The whole purpose for a closed deck block is to strengthen the walls.
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10-18-2021, 10:41 AM	#10
White340 Lieutenant Colonel 1392 Rep 1,985 Posts Drives: 2018 M3 Comp / 2022 X5 45e Join Date: Dec 2015 Location: NYC iTrader: (3)	35k on a motor running at full rpm 70% of the time seems pretty good. __________________ 2022 X5 45e : AW/Tartufo 2018 M3 Competition : AW/SO 2016 340i xDrive : AW/CR (sold)
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10-18-2021, 10:46 AM	#11
x.shell ▆ ✚✚ ▆▆▆▆▆▆ 6579 Rep 5,304 Posts Drives: ▋ ▉▉ Join Date: Nov 2012 Location: ▆▆▆ ▆▆▆ ▆ iTrader: (3)	This is their 3rd S55 motor. They've averaged about 35,000 kilometers (21,748 miles). They've only replaced the motors with used power plants; not new. This was not a crank hub issue. They hairline cracked the block. The M6 GT3 cars also average 30,000 - 35,000 kilometers on their race driven motors. Most of us are not running our cars like they do.
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10-20-2021, 03:57 AM	#12
///Msports180 Private First Class 61 Rep 140 Posts Drives: F80 C63 Join Date: Nov 2013 Location: Bunbury WA iTrader: (0)	The old saying used to be 100kms on the race track is a 1000kms on the road, they have done 35,000kms on the ring, so possibly 1500+ laps at 500+hp. I reckon that is pretty damn impressive for a factory engine. __________________ - F80 YMB - W205 C63 AMG - Ford Ranger -
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10-20-2021, 04:20 AM	#13
maddmatth Major 555 Rep 922 Posts Drives: F82 M4, E92 335i Join Date: Jun 2015 Location: New Zealand iTrader: (0)	35000km of nearly all full speed Nordshleife miles. Remember this car is mostly driven flat-out by professionals and runs 500-550hp tunes. In an engine that wasn't brand new to begin with. You are NOT putting anywhere near the same level of stress on your engine with the occasional trackday and canyon blast I wonder if it would be more economical for them to do a rebuild at 25000km or so rather than keep buying new engines. Not sure if a rebuild helps when it's the block cracking though?
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10-21-2021, 11:15 AM	#14
Peter_2jz New Member 5 Rep 12 Posts Drives: 15' F82 M4 Join Date: Apr 2021 Location: Europe , Bulgaria , Sofia iTrader: (0)	Can anyone advise if the crack in the cylinder wall can be welded ? Just curious
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10-21-2021, 11:30 AM	#15
Spun Pornhub Car Noob 79 Rep 87 Posts Drives: 2018 F80 Join Date: Jul 2018 Location: SoCal iTrader: (0)	the crack looks to be a very minor issue from numerous high heat cycles. if anyone paid attention, the owner mentioned that they could have continued to drive on the engine without major issues but they decided to pull it for a tear down to be extra safe. the physical cylinder wall itself is 100% ok. it's only the LDS coating that developed a hairline crack which has minimal impact on the block's structural integrity. the engine can be salvaged by an experienced machine shop using cylinder sleeves in place of the LDS coating.
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