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'11 E90 N55 bearings @ 167k mi; metal shavings, no knock
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02-26-2019, 09:46 PM | #45 |
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"Because is understood. I would expect anyone able to carry conversation about rod bearing installation to know that assembly lube is used."
What a condescending thing to say. Are you the guy that used a plate to tie his differential to the frame? Steve of Fuel It had a few words to say about that practice. |
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02-27-2019, 07:25 AM | #46 | |
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02-27-2019, 09:12 AM | #47 | |
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02-27-2019, 01:23 PM | #48 |
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Feuer, I was talking about a plate that I thought that you designed, and were selling for about 125 here. It ties the differential to the frame to minimize wheel hop and maximize traction. If that wasnt you, my apologies. Regardless, Steve Jenkins, owner of Fuel-It said it was a dumb idea.
Pladi, the parts for my swap out were ordered this morning. About 450. So along with my mechanic's labor it'll be less than a grand. Regardless of how many people that proactively change these things out only to find out the original set is ok it does not minimize anyone else's risk. Sorry, but I believe that the damage is cumulative, versus a one time event. Having problems after the OFHG may just be the final big straw. Are they not generally done at > 50 K miles? A new engine, oil cooler and Pure 2 + install would easily set me back ten large. No lol matter. Not having the means or wherewithal to either have someone else swap them for a grand, or 500 to DIY is something I'd cry about. As the man said "Pay me now, or pay me later." |
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02-27-2019, 01:37 PM | #49 | |
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Yeah I also think it's like you say the killer that the OFHG just starves oil or something for that much to completely go bye bye. Because we haven't seen new N55s "commonly" (issue isn't that common but you get what I mean) rip after OFHG as we do now right? Buuut at the same time the thing is if we go by that theory N54 rod bearing are the same (unless I am wrong) so... why not happen on N54 "commonly" now. I've did searches and I fail to find as much fails N54 335i than N55 335i ofhg like these and they probably have much more miles and beatings. |
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02-27-2019, 02:15 PM | #50 | |
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02-27-2019, 02:33 PM | #51 |
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but................... they are also different. They do have different cranks. (material composition) And you never know that might be a factor because different metals have different coefficients of expansion.. So i dont like how we keep saying same same same.. not quite the same.
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02-27-2019, 02:35 PM | #52 | |
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02-27-2019, 02:37 PM | #53 | |
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02-27-2019, 02:40 PM | #54 | |
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02-27-2019, 03:00 PM | #55 | |
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The same means ;same metal, same physical dimensions. One of those components is not the same. We can even get into how some metals attract oil additives differently.. and so many other variables.. Last edited by Pladi; 02-27-2019 at 03:10 PM.. |
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02-27-2019, 03:03 PM | #56 | ||
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02-27-2019, 03:04 PM | #57 |
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02-27-2019, 03:59 PM | #58 | |
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02-28-2019, 09:59 AM | #59 |
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That is way too granular. Dimensions are the same. You can argue theory all you want but unless you can quantify for me some significant difference then we go back to the empirical data which shows that there are no main bearings issues which would indicate an issue with the crank. Doesn't cast expand less anyway? The crank expanding less would mean the cast crank maintains better/wider oiling clearances as it heats up.
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02-28-2019, 10:04 AM | #60 | |
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02-28-2019, 10:20 AM | #61 | |
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Not sure why I even bother replying to these threads lol. Waste of time when people can't even be google part numbers to verify for themself that both engines use the same bearings. Last edited by bbnks2; 02-28-2019 at 10:34 AM.. |
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02-28-2019, 12:35 PM | #62 | |
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I did not take your comment out of context at all. Because your overall point is that the bottom end between the two engines is the same.. And its not the case. And you are asking how that is going to impact the bearing ? I am not a mechanical engineer or a metallurgist so i cant answer you but i know that different metals expand differently with heat. All you are doing is saying it desont have an impact. But you dont know. Dont make conclusions. If you think you are too good for these threads dont reply. lol like wtf Last edited by Pladi; 02-28-2019 at 01:33 PM.. |
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02-28-2019, 01:30 PM | #63 |
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I didn't know the crank in the n55 was cast. There's overwhelming evidence supporting forged cranks vs cast. A forged crank might have slightly higher coefficient of thermal expansion but that is easy to factor into the design of other components.
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02-28-2019, 01:32 PM | #64 |
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true say you used different rod bearings LOL but they are the same.
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02-28-2019, 01:39 PM | #65 | |
Clean is the new cool, keep it that way.
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Bruh, noobs got theories and shit.
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2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc.
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02-28-2019, 01:40 PM | #66 | |
Clean is the new cool, keep it that way.
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Yours is, but not all are cast.
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2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc.
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