[Pussiwillow]

Who's logged some decent miles on after market bearings.
I'm replacing my rod bearings and still on the fence if I should do oem or aftermarket, I have an f30 ewg n55, but y'all share the same lower end basically and a lot of you aren't afraid to wrench so I may get more answers here, I have king and acl coming.
Im leaning on acl based on other platforms etc… would love to hear some feedback
Thanks everyone

[lightmanek]

Originally Posted by Pussiwillow

Who's logged some decent miles on after market bearings.
I'm replacing my rod bearings and still on the fence if I should do oem or aftermarket, I have an f30 ewg n55, but y'all share the same lower end basically and a lot of you aren't afraid to wrench so I may get more answers here, I have king and acl coming.
Im leaning on acl based on other platforms etc… would love to hear some feedback
Thanks everyone

Is 35000 miles on King any good?




Absolutely fine, but they had easy life with up to 750hp crank and 1000Nm.
Still using them after putting engine together with new piston rings.

Hope this helps

[Pussiwillow]

Originally Posted by lightmanek

Is 35000 miles on King any good?




Absolutely fine, but they had easy life with up to 750hp crank and 1000Nm.
Still using them after putting engine together with new piston rings.

Hope this helps

Dang, rod bearings as well? I say at 700+ for that many miles is a good review haha

[Aceway]

I've had king bearings in my N55 for 1k miles. No issues.

[Pussiwillow]

Originally Posted by Aceway

I've had king bearings in my N55 for 1k miles. No issues.

Did you by chance grab clearance data? From what I see it's right around .002
Oem is around .00135-.0015
Any reason you chose king over acl? Assuming after market for more clearance and price

[Aceway]

No sorry, didn't measure. Just went standard clearances. After seeing the condition of my original bearings it was not needed at all. OPG job and baffle was being welded to the pan so figured bearings should be changed too. Went with king because a full set was $80.

[Pussiwillow]

Originally Posted by Aceway

No sorry, didn't measure. Just went standard clearances. After seeing the condition of my original bearings it was not needed at all. OPG job and baffle was being welded to the pan so figured bearings should be changed too. Went with king because a full set was $80.

I'm doing the pan gasket and mmr bolt in baffle, how many miles were on your engine at time of replacement?
You said the original were still in good shape?
I have 80k on mine and it's been maintained very well, more than the average owner would for sure, I've been debating touching them to begin with but I have everything on hand, ha

[lightmanek]

Originally Posted by Pussiwillow

Did you by chance grab clearance data? From what I see it's right around .002
Oem is around .00135-.0015
Any reason you chose king over acl? Assuming after market for more clearance and price

I went with tiny bit bigger clearance with my King bearings to help with running thicker oil for abusing engine on a track. Normally I run 5W40 and for hot summer track action 5W50.

[Aceway]

Originally Posted by Pussiwillow

I'm doing the pan gasket and mmr bolt in baffle, how many miles were on your engine at time of replacement?
You said the original were still in good shape?
I have 80k on mine and it's been maintained very well, more than the average owner would for sure, I've been debating touching them to begin with but I have everything on hand, ha

163k miles. PO did some track days with the car and oil was changed pretty religiously. Can't hurt to do it and good peace of mind.

[Pussiwillow]

Originally Posted by lightmanek

I went with tiny bit bigger clearance with my King bearings to help with running thicker oil for abusing engine on a track. Normally I run 5W40 and for hot summer track action 5W50.

That's what makes me lean on after market over oem, little more clearance for thicker oil, which gives that little extra protection with abuse.
Hmmm

[Pussiwillow]

Originally Posted by Aceway

163k miles. PO did some track days with the car and oil was changed pretty religiously. Can't hurt to do it and good peace of mind.

Ya I would love the peace of mind for sure knowing it's fresh and trouble free, the 8xk mile mark has seemed to be a bad luck number for a few lately

[haaken675]

Originally Posted by Aceway

I've had king bearings in my N55 for 1k miles. No issues.

I would really hope with new bearings you didn't have issues at 1,000 miles......

[Pussiwillow]

Originally Posted by haaken675

I would really hope with new bearings you didn't have issues at 1,000 miles......

Lol 😂

[feuer]

Originally Posted by Pussiwillow

Dang, rod bearings as well? I say at 700+ for that many miles is a good review haha

Most definitely it didn’t run for 35000 miles making 700hp non stop. It doesn’t work like that. Anyhow, I have 22000 miles on mine. KOLBENSCHMIDT bearings. Standard. Daily driver. Winter -30c. Summer 40c. Few tracks days too. I use Rotella T6 0w-40 or 5w-40

[Saif2018]

Originally Posted by feuer

Most definitely it didn’t run for 35000 miles making 700hp non stop. It doesn’t work like that. Anyhow, I have 22000 miles on mine. KOLBENSCHMIDT bearings. Standard. Daily driver. Winter -30c. Summer 40c. Few tracks days too. I use Rotella T6 0w-40 or 5w-40

He clearly said it was crank HP and he babied it. Its possible.

[feuer]

Originally Posted by Saif2018

He clearly said it was crank HP and he babied it. Its possible.

Hey without a lector on this forum we won’t be able to understand anything Easy life was sarcastic.

[lightmanek]

Originally Posted by feuer

Most definitely it didn’t run for 35000 miles making 700hp non stop. It doesn’t work like that. Anyhow, I have 22000 miles on mine. KOLBENSCHMIDT bearings. Standard. Daily driver. Winter -30c. Summer 40c. Few tracks days too. I use Rotella T6 0w-40 or 5w-40

Who drives like that? Where? Dyno runs all the time?

Here is a rough description of how I use my car:
Car was tracked once, did 179Mph (289kph) on Autobhan and average speed for over 600 miles was at 100Mph with hours doing 120Mph+ where possible, went through 7 map revisions and 2 tuners which needed multiple WOT's for logging at various Ethanol content (easy 100+ pulls and a dozen interrupted ones), accidentally ran 29psi for few WOT's making way more than 700whp, etc. but yes, most miles were done on motorways with easy UK style driving I typically ran 23psi on pump 94Oct fuel due to poor availability and price of Ethanol in UK, but went through few tanks of E30, E40 and E60+ mixes at up to 26psi, which is more than 700hp crank, but I rather understate than overstate.
Make no assumption on how I drive, as I tend to use full power on every trip when starting from lights, overtaking or simply doing spirited drives on twisty roads. No videos of this type of driving as they might be deemed here an offence, despite me keeping large margin of safety on public roads and mostly keeping to speed limits.
I do look after it well, never use high revs or drive it hard if oil is not up to temp., do normal maintenance, oil, filters, etc. and most importantly, when engine had new bearings installed, I wore them in gently, driving slowly for the first 3000miles before upping boost and using full revs. The end result is minimal wear considering power and how I use my car.

PS. Only reason I took engine apart was to check my piston rings and gap them for higher boost after I accidentally ran that 29psi map with low E25 mix. It was a good call as rings needed changing on cylinder 1 and 2, they closed completely and made tiny mark on cylinder wall. Worth noting, OEM rings from prior to 2019 (my previous ones) had smaller gaps than current version (0.0134inch old vs. 0.016inch new).

[feuer]

Originally Posted by lightmanek

Who drives like that? Where? Dyno runs all the time?

Unfortunately some people are very literal and place huge emphasis on numbers. How many HP, how many miles, and etc. What matters most is how engine was utilized. 300hp engine with lot of on-off cycles will endure lot more wear than 600hp that ran on the Hwy. For whatever the reason 9 out of 10 people won’t even consider this. So when you tell them 700hp for 30k+ miles it must be good yes? I say it could be but not necessarily. Seems like you are talking very good care of your engine thus running longer although is heavily modified. I have 2008 335i that is on a second engine already and this second engine has the bottom end rebuild already. Chassis doesn’t even have 130k miles. One will say oh that’s not reliable engine at all, but I have done over 50 track days. I’m talking road corse. Like 5 to 7 sessions about 30 min each per day when you drive like bat out of hell. So to me these engines are quite strong. That is about my twin turbo n54. I also have single turbo n54 with PI. I have pushed it past 30psi many times but at high RPMs so not so tough on the engine. It’s automatic car so that is easier on the engine too. Manual shift at 30psi will result badly I think. I track both of them. The single turbo is like a prostitute. At least 10 different drivers have been driven it with in the last year. They don’t baby it when they drive it either. Have done 300kmh like you. They have seen very hot temps and very cold too.

[Pussiwillow]

Amazing guys, anyone here wanna recommend me a torque wrench? Oem rod bolts 20nm plus 70* plus 70*
Was looking at the cdi torque angle wrench in 1/4" drive (dunno if it's a good amount of leverage) goes to 240in lbs which is enough for rod bearings and for windage and oil pan bolts
Which all need torque angle and low torque value, thoughts?

[lightmanek]

Originally Posted by feuer

Unfortunately some people are very literal and place huge emphasis on numbers. How many HP, how many miles, and etc. What matters most is how engine was utilized. 300hp engine with lot of on-off cycles will endure lot more wear than 600hp that ran on the Hwy. For whatever the reason 9 out of 10 people won’t even consider this. So when you tell them 700hp for 30k+ miles it must be good yes? I say it could be but not necessarily. Seems like you are talking very good care of your engine thus running longer although is heavily modified. I have 2008 335i that is on a second engine already and this second engine has the bottom end rebuild already. Chassis doesn’t even have 130k miles. One will say oh that’s not reliable engine at all, but I have done over 50 track days. I’m talking road corse. Like 5 to 7 sessions about 30 min each per day when you drive like bat out of hell. So to me these engines are quite strong. That is about my twin turbo n54. I also have single turbo n54 with PI. I have pushed it past 30psi many times but at high RPMs so not so tough on the engine. It’s automatic car so that is easier on the engine too. Manual shift at 30psi will result badly I think. I track both of them. The single turbo is like a prostitute. At least 10 different drivers have been driven it with in the last year. They don’t baby it when they drive it either. Have done 300kmh like you. They have seen very hot temps and very cold too.

Absolutely right!
But these engines are hard. Friend of mine has 118i N54 swapped and tracks it or drives like it's stolen. Engine is keeping strong and running 3rd season since replacing rod bearings and doing proper maintenance, but twin turbos were a weak link (3 sets of hybrids failed prematurely, where stock turbos were running fine a long time). Not pushed to the limits as this is a 500hp car, and even at this power he has more radiators fitted than Bugatti Veyron to keep it cool on a race track, but he is now converting to a G30-660 single turbo setup.