Scarring found in cyclinder walls

S65Motorsports · 08-29-2018, 02:53 PM

Please help with advice: purchased 2012 e93 with inspection... started getting increased emission code, had dealer check, and found the actuators were going bad, o2 sensor bad, and secondary air pump bad. Repaired all, error kept returning. Pulled a few plugs and noticed 2 looked pretty bad (6&7)... decided to look in cylinder and bad scars. I have had the car 2 months, either rebuild, replace engine or sell. What in the world to do ...

M3 Dreams Crushed

SYT_Shadow · 08-29-2018, 02:56 PM

that's the first time I've heard of that related to a S65

nrubenstein · 08-29-2018, 04:38 PM

Carmax is your friend here.

dparm · 08-29-2018, 04:54 PM

How bad is the scoring? Have you performed compression and leakdown tests?

BOOF-M3 · 08-29-2018, 07:16 PM

Rebuild and replace are probably not options as those will cost half of what your E93 is worth. Selling and not disclosing would be bad mojo (not suggesting that was your intention). Perhaps go back to seller and see if they are willing to help.

Solo_M_Tech · 08-29-2018, 08:49 PM

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

Honda · 08-29-2018, 09:33 PM

Quote:

Originally Posted by Fubar_M3

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

Wouldn't a failed injector through a CEL?

Solo_M_Tech · 08-29-2018, 09:42 PM

Quote:

Originally Posted by Honda

Quote:

Originally Posted by Fubar_M3

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

Wouldn't a failed injector through a CEL?

Yeah it probably did for the previous owner. they dumped the car because of the issues. Used car dealer buys it at auction and gets the injectors fixed because of the misfires. Sells the car but doesnt fix the entire issue. just bandaid it.

Now the OP has to deal with it.

aswy6 · 08-29-2018, 10:33 PM

Quote:

Originally Posted by Fubar_M3

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

When i was changing my plugs, two of them looked really bad... And they were also 6&7 cylinders. The whole plug was pure black and even the coil was dark brown. Would you think that i have similar thing happening here as well?

Solo_M_Tech · 08-29-2018, 10:56 PM

Quote:

Originally Posted by aswy6

Quote:

Originally Posted by Fubar_M3

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

When i was changing my plugs, two of them looked really bad... And they were also 6&7 cylinders. The whole plug was pure black and even the coil was dark brown. Would you think that i have similar thing happening here as well?

Black build up is oil burning. it's possible but more likely valve stem seals.

deansbimmer · 08-30-2018, 12:59 PM

Scored walls happen. How many miles on the car? Cheapest route would be to find a used engine on the lower end of the cost spectrum and have it installed.

aswy6 · 08-30-2018, 08:33 PM

Quote:

Originally Posted by Fubar_M3

Quote:

Originally Posted by aswy6

Quote:

Originally Posted by Fubar_M3

Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it.

You're better off replacing the engine as thats the cheapest route.

When i was changing my plugs, two of them looked really bad... And they were also 6&7 cylinders. The whole plug was pure black and even the coil was dark brown. Would you think that i have similar thing happening here as well?

Black build up is oil burning. it's possible but more likely valve stem seals.

Only on 2 cylinders? In 1 year and 6k miles car did not consume a tiny bit of oil though

Solo_M_Tech · 08-30-2018, 08:44 PM

Quote:

Originally Posted by aswy6

Only on 2 cylinders? In 1 year and 6k miles car did not consume a tiny bit of oil though

You'd have more issues if you had scoring in the cylinders. Those two cylinders are burning oil.

S65Motorsports · 09-08-2018, 11:41 AM

Fubar_ M3 it is buring oil, however no smoke out the tail pipe, or no burning oil smell. I went into limp mode a few days, and took it to the dealer they had to replace plugs 6 and 7... drove great. He mentioned I can periodically swamp those plugs with others to clean them up...

where is this excessive oil going...

deansbimmer · 09-08-2018, 12:00 PM

BMW states any consumption up to 2qts per 1000 miles is acceptable and chalks it up to engine use variables. You don't say how much yours is consuming. You already said you observed scoring in the cylinders. That's what's would cause excessive oil consumption. Piston rings control oil on the cylinder walls. If the walls are scored the rings cannot wipe the oil off as well so you're going use more oil.

You won't smell or see that consumption. The combustion process burns most of it and the catalysts in the exhaust help burn off the rest.

08-29-2018, 02:53 PM	#1
S65Motorsports New Member 1 Rep 6 Posts Drives: e93, e70 and 328i Join Date: Jun 2018 Location: Ga iTrader: (0)	Scarring found in cyclinder walls Please help with advice: purchased 2012 e93 with inspection... started getting increased emission code, had dealer check, and found the actuators were going bad, o2 sensor bad, and secondary air pump bad. Repaired all, error kept returning. Pulled a few plugs and noticed 2 looked pretty bad (6&7)... decided to look in cylinder and bad scars. I have had the car 2 months, either rebuild, replace engine or sell. What in the world to do ... M3 Dreams Crushed
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08-29-2018, 02:56 PM	#2
SYT_Shadow ///M Powered for Life 11500 Rep 10,332 Posts Drives: E90M/E92M/M4GTS/M4GT4/X5M Join Date: Sep 2010 Location: Greenwich, CT iTrader: (2)	that's the first time I've heard of that related to a S65 __________________ DIY: S65 Rod Bearings E9X PFC Z54 BBK on F8X BK harness bar + seats: fit 6 tires in an M3 do88 Cooling Goodies GTS Twins: GTMore project
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08-29-2018, 04:38 PM	#3
nrubenstein Captain 567 Rep 801 Posts Drives: E30 M3/E36 M3/E46 M3/E90 M3 Join Date: Dec 2016 Location: Washington, DC iTrader: (2)	Carmax is your friend here. __________________ 2011.75 E90 M3 \| 2006 GMC Sierra LBZ \| 2004 X5 3.0i 6MT \| 1995 M3 S50B32 \| 1990 325is \| 1989 M3 S54B32 Hers: 1996 911 Turbo \| 1989 325iX
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08-29-2018, 04:54 PM	#4
dparm Stop the hate, get a V8 3851 Rep 8,625 Posts Drives: C7 Corvette GS, AMG C63 S Join Date: Jun 2013 Location: Frisco, TX iTrader: (1)	How bad is the scoring? Have you performed compression and leakdown tests? __________________ Now: 2017 Corvette Grand Sport, 2021 AMG C63 S sedan Past: 2011.5 M3 sedan ZCP
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08-29-2018, 07:16 PM	#5
BOOF-M3 Brigadier General 4452 Rep 4,014 Posts Drives: 2011 M3 Join Date: Nov 2014 Location: South Pasadena Florida iTrader: (1)	Rebuild and replace are probably not options as those will cost half of what your E93 is worth. Selling and not disclosing would be bad mojo (not suggesting that was your intention). Perhaps go back to seller and see if they are willing to help.
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08-29-2018, 08:49 PM	#6
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	Scoring is most likely caused by a failed injector. Fuel washed the cylinder causing a lack of lubrication. Previous owner probably got scared of the repair bill and dumped it. You're better off replacing the engine as thats the cheapest route. __________________ 2014 M5 6MT
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08-30-2018, 12:59 PM	#11
deansbimmer BimmerPost Supporting Vendor 3757 Rep 2,908 Posts Drives: 2011 E93 M3 Join Date: Nov 2014 Location: DFW, Texas iTrader: (17) Garage List 1988 BMW M3 [0.00] 2013 BMW M3 [0.00] 2011 X5M [0.00] 2011 BMW M3 [0.00]	Scored walls happen. How many miles on the car? Cheapest route would be to find a used engine on the lower end of the cost spectrum and have it installed.
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09-08-2018, 11:41 AM	#14
S65Motorsports New Member 1 Rep 6 Posts Drives: e93, e70 and 328i Join Date: Jun 2018 Location: Ga iTrader: (0)	Fubar_ M3 it is buring oil, however no smoke out the tail pipe, or no burning oil smell. I went into limp mode a few days, and took it to the dealer they had to replace plugs 6 and 7... drove great. He mentioned I can periodically swamp those plugs with others to clean them up... where is this excessive oil going...
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09-08-2018, 12:00 PM	#15
deansbimmer BimmerPost Supporting Vendor 3757 Rep 2,908 Posts Drives: 2011 E93 M3 Join Date: Nov 2014 Location: DFW, Texas iTrader: (17) Garage List 1988 BMW M3 [0.00] 2013 BMW M3 [0.00] 2011 X5M [0.00] 2011 BMW M3 [0.00]	BMW states any consumption up to 2qts per 1000 miles is acceptable and chalks it up to engine use variables. You don't say how much yours is consuming. You already said you observed scoring in the cylinders. That's what's would cause excessive oil consumption. Piston rings control oil on the cylinder walls. If the walls are scored the rings cannot wipe the oil off as well so you're going use more oil. You won't smell or see that consumption. The combustion process burns most of it and the catalysts in the exhaust help burn off the rest.
	Appreciate 0 Quote