N55 rod knock/spun bearing tracking

bbnks2 · 07-31-2018, 08:29 AM

Quote:

Originally Posted by TZANIDO777

I am slightly skeptical about plumbing in an accusump as I remember reading that it does not entirely address the issue and is only a band aid.

I know VAC makes a baffle for our oil pan but have never seen a dry sump for our cars which is what we really need. Albeit would be expensive but two blown engines would cost you roughly one dry sump assuming you blow two engines lol

I can't see how an oil pan baffle alone really helps all that much in race conditions. However, it does look like BMW gave the M2 a baffled oil pan:

BMW also gave the M2 a semi-dry sump system which pumps oil from the front of the oil pan (#2) back to the rear of the pan where the oil pickup is (#6):

If only it wasn't so expensive to retrofit the M2 oil system...

The accusump at least guarantees you never see <40psi oil pressure. You rarely see oil pressure loss at max load where you need the 80psi. You usually see it mid-corner or under heavy braking which are both scenarios where you will either be completely off the throttle or only partial throttle. Oil accumulators work. I spoke with Accusump engineer directly recently and he walked me through a ton of different uses.

lwgrenier · 11-13-2018, 03:01 PM

Quote:

Originally Posted by rich_mane

When I worked at the dealership, we only saw a handful of locked up N55s. And almost every single one of them was within a few hundred miles of having their OFHG replaced. We even had it happen once or twice where the tech would replace the gaskets and take it for a spin, and the motor would lock up on the test drive. I'm not sure if they were beating on the motors or what, but have noticed that a lot of these failures come right after the service of the OFHG. Maybe something foreign getting into the filtered oil port and blocking an oil squirter like I've seen mentioned in some other threads like this one:

https://www.1addicts.com/forums/show....php?t=1359507

Exact same thing just happened to my car. OFHG and drove 5mi/10 minutes and engine seized.

xxMike61 · 11-13-2018, 08:12 PM

Is it more of coolant leaking into the oil or something falling into the block? I've seen a few videos of OFHG DIYs and for those who don't drain the coolant it seems that a lot of coolant could easily get into the oil

SnapCoupe · 11-14-2018, 09:26 AM

Quote:

Originally Posted by lwgrenier

Exact same thing just happened to my car. OFHG and drove 5mi/10 minutes and engine seized.

I just posted in your other thread. Did you only have the OFHG replaced, or did you do the oil cooler gasket as well?

lwgrenier · 11-14-2018, 09:45 AM

Quote:

Originally Posted by SnapCoupe

I just posted in your other thread. Did you only have the OFHG replaced, or did you do the oil cooler gasket as well?

I'm an XDrive so no oil cooler. Just the OFHG.

9krpmrx8 · 11-14-2018, 12:13 PM

FYI, having Xdrive has nothing to do with having an oil cooler or not.

lwgrenier · 11-14-2018, 01:17 PM

Quote:

Originally Posted by 9krpmrx8

FYI, having Xdrive has nothing to do with having and oil cooler or not.

Hm is it build date? I figured it was just cause there wasn't space for it with awd. Guess not. I think I'm a pretty early build date.

SnapCoupe · 11-14-2018, 02:47 PM

Quote:

Originally Posted by lwgrenier

Hm is it build date? I figured it was just cause there wasn't space for it with awd. Guess not. I think I'm a pretty early build date.

I think all sport package cars come with the cooler.

lwgrenier · 11-14-2018, 03:21 PM

Quote:

Originally Posted by SnapCoupe

I think all sport package cars come with the cooler.

I think mine is a sport package, just not an M-Sport. I didn't think they all came with paddle shifters.

Pladi · 11-14-2018, 04:14 PM

Quote:

Originally Posted by SnapCoupe

I think all sport package cars come with the cooler.

I thought that was not an oil cooler but a oil thermostat. Maybe combination ? not sure.

9krpmrx8 · 11-14-2018, 04:26 PM

It has nothing to do with Sport or M sport either. It's a "hot climate" option thing, if it has that option then it has an oil cooler. And the paddle shifters are optional as well.

9krpmrx8 · 11-14-2018, 04:27 PM

Quote:

Originally Posted by Pladi

I thought that was not an oil cooler but a oil thermostat. Maybe combination ? not sure.

There would be no need for an oil thermostat without and oil cooler.......

Pladi · 11-14-2018, 04:32 PM

Quote:

Originally Posted by 9krpmrx8

There would be no need for an oil thermostat without and oil cooler.......

Yes true.

lwgrenier · 11-14-2018, 04:41 PM

Just to be clear, these cars have an oil pressure sensor that should throw a warning if pressure drops, correct?

TheMidnightNarwhal · 11-14-2018, 05:15 PM

Hey but guys another thing to keep in mind why on the N54 wouldn't it seize if something is dropped while doing OFHG job. Is it because N54 engine rod bearing a tougher or?

9krpmrx8 · 11-14-2018, 05:24 PM

Quote:

Originally Posted by lwgrenier

Just to be clear, these cars have an oil pressure sensor that should throw a warning if pressure drops, correct?

Yes.

Quote:

Originally Posted by TheMidnightNarwhal

Hey but guys another thing to keep in mind why on the N54 wouldn't it seize if something is dropped while doing OFHG job. Is it because N54 engine rod bearing a tougher or?

Plenty of N54's seize up from rod bearing failure too. But there are always different variables and in no way is it a real problem as it's still a very small number. No one knows if there is even a broad issue on the N55 as most of the failures occur on modified cars and keep in mind that only a small fraction of owners use forums and even then people who have no problems at all don't post up to say everything is fine. Lot's of variables.

Pladi · 11-14-2018, 05:57 PM

Quote:

Originally Posted by lwgrenier

Just to be clear, these cars have an oil pressure sensor that should throw a warning if pressure drops, correct?

Absolutely. Almost every car made with OBD 2 has an oil pressure sensor.

If you can retrieve frame freeze data i would.

Kevin39 · 11-15-2018, 09:04 AM

Quote:

Originally Posted by 9krpmrx8

people who have no problems at all don't post up to say everything is fine.

This

lwgrenier · 11-15-2018, 03:43 PM

Quote:

Originally Posted by Pladi

Absolutely. Almost every car made with OBD 2 has an oil pressure sensor.

If you can retrieve frame freeze data i would.

Found a specialist in my area that was recommended by a few people on FB. Will have him do as thorough of an investigation as he can without really breaking the bank. Either way I know I'm going to be spending $$$

cahme · 01-26-2019, 10:13 AM

Here are a few more that have popped up since the spreadsheet was updated:

balkanbemve 55k 2011 335xi stock
https://www.e90post.com/forums/showt...php?t=1576786&

lwgrenier 68K 2011 335xi E92 MHD
https://www.e90post.com/forums/showthread.php?t=1554479

JasonM335i 50k 2012 335i E92 ??
https://www.e90post.com/forums/showthread.php?t=1557096

cranelec 68k 2011 335xi ? PS2, Custom Tune
https://www.e90post.com/forums/showthread.php?t=1560261

lwgrenier · 01-26-2019, 10:41 AM

I don’t know if mine is really relevant as it was pretty clearly an oiling issue due to error on my mechanic’s part.

Pladi · 01-26-2019, 12:34 PM

Quote:

Originally Posted by cahme

Here are a few more that have popped up since the spreadsheet was updated:

balkanbemve 55k 2011 335xi stock
https://www.e90post.com/forums/showt...php?t=1576786&

lwgrenier 68K 2011 335xi E92 MHD
https://www.e90post.com/forums/showthread.php?t=1554479

JasonM335i 50k 2012 335i E92 ??
https://www.e90post.com/forums/showthread.php?t=1557096

cranelec 68k 2011 335xi ? PS2, Custom Tune
https://www.e90post.com/forums/showthread.php?t=1560261

WOW the mileage correlation is crazy. ( I know we will have a smart ass here saying big words like correlation does not equal causation blah blah

)

But my car has 63K miles build 09/2010.

Fingers crossed

11-13-2018, 08:12 PM	#91
xxMike61 First Lieutenant 79 Rep 239 Posts Drives: 2011 335i Coupe Join Date: Feb 2017 Location: Sacramento, CA iTrader: (0)	Is it more of coolant leaking into the oil or something falling into the block? I've seen a few videos of OFHG DIYs and for those who don't drain the coolant it seems that a lot of coolant could easily get into the oil __________________ 2011 335i M-Sport E92 MHD E30 \| Phoenix Racing CP \| K&N Drop In Air Filter \|Fuel-it Stage 2 LPFP \| xHP Stage 3 \| VRSF DP \| ARM 5" FMIC + Hose Upgrades \| GFB DV+ \| VMR 19" v703
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11-14-2018, 12:13 PM	#94
9krpmrx8 Clean is the new cool, keep it that way. 814 Rep 1,685 Posts Drives: 11' Alpine White 335i Sedan Join Date: Jan 2016 Location: San Antonio, Texas iTrader: (0)	FYI, having Xdrive has nothing to do with having an oil cooler or not. __________________ 2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc. 2015 X5 35i Xdrive Last edited by 9krpmrx8; 11-14-2018 at 04:27 PM..
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11-14-2018, 04:26 PM	#99
9krpmrx8 Clean is the new cool, keep it that way. 814 Rep 1,685 Posts Drives: 11' Alpine White 335i Sedan Join Date: Jan 2016 Location: San Antonio, Texas iTrader: (0)	It has nothing to do with Sport or M sport either. It's a "hot climate" option thing, if it has that option then it has an oil cooler. And the paddle shifters are optional as well. __________________ 2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc. 2015 X5 35i Xdrive
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11-14-2018, 04:41 PM	#102
lwgrenier First Lieutenant 121 Rep 255 Posts Drives: 2011 e92 335i XDrive Join Date: Oct 2017 Location: New Hampshire iTrader: (0)	Just to be clear, these cars have an oil pressure sensor that should throw a warning if pressure drops, correct?
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11-14-2018, 05:15 PM	#103
TheMidnightNarwhal Major General 2814 Rep 6,384 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Hey but guys another thing to keep in mind why on the N54 wouldn't it seize if something is dropped while doing OFHG job. Is it because N54 engine rod bearing a tougher or?
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01-26-2019, 10:13 AM	#108
cahme Second Lieutenant 120 Rep 226 Posts Drives: '11 E90 335i Sport MT Join Date: Jul 2015 Location: Texas iTrader: (0)	Here are a few more that have popped up since the spreadsheet was updated: balkanbemve 55k 2011 335xi stock https://www.e90post.com/forums/showt...php?t=1576786& lwgrenier 68K 2011 335xi E92 MHD https://www.e90post.com/forums/showthread.php?t=1554479 JasonM335i 50k 2012 335i E92 ?? https://www.e90post.com/forums/showthread.php?t=1557096 cranelec 68k 2011 335xi ? PS2, Custom Tune https://www.e90post.com/forums/showthread.php?t=1560261
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01-26-2019, 10:41 AM	#109
lwgrenier First Lieutenant 121 Rep 255 Posts Drives: 2011 e92 335i XDrive Join Date: Oct 2017 Location: New Hampshire iTrader: (0)	I don’t know if mine is really relevant as it was pretty clearly an oiling issue due to error on my mechanic’s part.
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