Rod Bearings?

[behindthen0thing]

ok Just had mine done here.
Cost a grand.

Got 61K miles, been tuned very early on. Running aftermarket turbos, meth. Dynod at 672 hp .

Always use royal purple or Amsoil. Always change oil between 3-6K miles.
I don't use auto stop start.

Here are my bearings.

The scratches are just from them banging around in my trunk.

I don't know if the marks you see are superficial or not. There are oil grooves that are no longer there in the darkened areas.

The shop here recommends if you plan on keeping the car for the long haul to change the bearings around 100K Kilometers which is about 60,000 miles.

[TractionControlDelete]

Originally Posted by behindthen0thing

ok Just had mine done here.
Cost a grand.

Got 61K miles, been tuned very early on. Running aftermarket turbos, meth. Dynod at 672 hp .

Always use royal purple or Amsoil. Always change oil between 3-6K miles.
I don't use auto stop start.

Here are my bearings.

The scratches are just from them banging around in my trunk.

I don't know if the marks you see are superficial or not. There are oil grooves that are no longer there in the darkened areas.

The shop here recommends if you plan on keeping the car for the long haul to change the bearings around 100K Kilometers which is about 60,000 miles.

Looks good to me! I'll try to find a photo from my M6 to show what terrible bearings look like haha

[behindthen0thing]

Originally Posted by F82KPowers

Looks good to me! I'll try to find a photo from my M6 to show what terrible bearings look like haha

I'm not saying they are bad, Chances are they could last a long time who knows,

But you don't really know until you remove so the price wasn't aweful and it seemed like a good preventative thing to do because of my power level and I'll be relocating to another country soon that doesn't have the knowledge and expertise found here in eu.

[TractionControlDelete]

Originally Posted by behindthen0thing

I'm not saying they are bad, Chances are they could last a long time who knows,

But you don't really know until you remove so the price wasn't aweful and it seemed like a good preventative thing to do because of my power level and I'll be relocating to another country soon that doesn't have the knowledge and expertise found here in eu.

Great point. Really appreciate you for posting about it 💪

[behindthen0thing]

Originally Posted by F82KPowers

Great point. Really appreciate you for posting about it 💪

Ok So I sanded it down just now.

Sanding the darkened area it got slightly more silver then turned copper.
Doesn't seem like allot left after that dark area.
I'm not sure what the thickness of a new bearing is compared to what I have here,

I can measure one at a darkened area, the copper and the silver part in a few days at work to get an idea, but overall it does appear to be close to the copper at the darkened spots.
Didn't take long to get to copper.

[sly1types]

Originally Posted by behindthen0thing

ok Just had mine done here.
Cost a grand.

Got 61K miles, been tuned very early on. Running aftermarket turbos, meth. Dynod at 672 hp .

Always use royal purple or Amsoil. Always change oil between 3-6K miles.
I don't use auto stop start.

Here are my bearings.

The scratches are just from them banging around in my trunk.

I don't know if the marks you see are superficial or not. There are oil grooves that are no longer there in the darkened areas.

The shop here recommends if you plan on keeping the car for the long haul to change the bearings around 100K Kilometers which is about 60,000 miles.

Wow those look great especially compared to mine. For the money its worth having the peace of mind.

[hC1001]

Originally Posted by behindthen0thing

Ok So I sanded it down just now.

Sanding the darkened area it got slightly more silver then turned copper.
Doesn't seem like allot left after that dark area.
I'm not sure what the thickness of a new bearing is compared to what I have here,

I can measure one at a darkened area, the copper and the silver part in a few days at work to get an idea, but overall it does appear to be close to the copper at the darkened spots.
Didn't take long to get to copper.

Thanks for showing us. I always thought there was no copper layer on these bearings.

[IamFODI]

Originally Posted by behindthen0thing

I can measure one at a darkened area, the copper and the silver part in a few days at work to get an idea

And one of the relatively intact areas, please!

This would be great.

[TopJimmy]

behindthen0thing my mechanic asks if your car had ever spun a crank hub in its lifetime? He needs that info before commenting.

[behindthen0thing]

Originally Posted by TopJimmy

behindthen0thing my mechanic asks if your car had ever spun a crank hub in its lifetime? He needs that info before commenting.

Never spun a hub.

I had a bolt capture installed around 30k miles

And around 40k I had the Insane hub installed and the stock hub that came out looked fine and the friction washer was still intact as well

[hC1001]

Wish someone would plasti gauge a new bearing set vs old bearings. Id pay for the new bolts too.

[IamFODI]

Originally Posted by hC1001

Wish someone would plasti gauge a new bearing set vs old bearings. Id pay for the new bolts too.

Nice.

Gotta control for tolerances though. Would need to do this before-and-after on the new set, or on LOTS of different sets.

[fivaxis]

My E92 M3 has 155k on stock rod bearings, I think my F82 will be ok.

[Graves]

So, took my car in today for a ticking/knocking noise. Car has 23,555 miles. CH done, Downpipes, intakes, and tune. Attached is the video of the noise and then the video from BMW. Car drives perfectly fine, pulls hard, just makes noise until it’s warm. Car doesn’t smoke idling or under WOT (that I have ever noticed). Dealer says it could be the exhaust camshaft which is what I think it is, but they’re also saying rod bearings because they found metal in the oil filter (can’t see it in the video. At least I can’t). Going to have them crack the top half and check it. But told them I want to personally inspect it myself. The tech in the video says “may need a new motor” but I doubt it needs that. Worst case, new bearings should do the trick as long as there is no major scoring or damage that can be seen. From the research I have done, if the exhaust camshaft is bad, the gear on it gets chewed up and that would explain the metal shavings as well. Anyhow, curious on people’s thoughts that have personally dealt with this. Thanks.

https://youtube.com/shorts/KIM8Q9PZ6C0?feature=share

http://cbmwsga.mkvwa24.com/p/1UCmce.html

[Joy15779]

Pay attention mates... my engine has been f...ed by one of this...
Now cp carillo pistons, Arrow rods and REINFORCED bearings. Result = mig 28

[Track/S]

Originally Posted by Joy15779

Pay attention mates... my engine has been f...ed by one of this...
Now cp carillo pistons, Arrow rods and REINFORCED bearings. Result = mig 28

You have pictures? How do you know who was guilty?

[Joy15779]

Yes I have pics plus tuner analysis. Gonna send asap

[undermine]

Originally Posted by Ravcik

Two Months ago i have been doing crank hub FIX, so when oil pan was dissasembled i decided exchange rod bearings with timing chain and timing belts. Car has over 100 K kilometers so if you want keep car in good shape and doing crank hub is recommended to check rod bearings, and all stuff around.

You can see that rod bearings was not tragic but in few k kilometers should be replaced. Keep in mind that i dont smoke tires in every corner, so it depends how you ride and how often you replace oil.
I change oil every 5-6 K kilometrs and use Millers CFS 5w40 nt+.

Can anyone tell me which crankshaft holding tool is pictured or another for the S55, PN please.

[papasmurf_m3]

Sorry not gonna read through all this but, yea I really hope you guys are not swapping rod bearings as preventative? Facepalm.

You can pull any rod or crank bearing off any S55 and look pretty same as the next. Bearings are suppose to wear down like that.

E92 M3 engine eat rod bearings. S55 does not.

[Jim45678]

OK, so here is my story with ROD BEARINGS. I planned to finally install Vargas Spline Lock crankhub fix and made an appointment with my mechanic.

We did the installation but "while we were there" we decided to replace timing belt, chain etc and verify rod bearings. I was surprised that we want to check them in S55 with this low mileage i have but hey, we are already there and i'm not planning opening engine any time soon again. Not sure about my car but at least i don't

So here we are... I already showed these pictures to couple of friends who are more mechanical oriented than me and they all claim it was time to replace them. I read full thread here and especially papasmurf_m3] comment and i'm confused either this wear is typical and is fine or my engine got some beating from previous owner and they look now as they do.

Engine was never opened before, no spun on crankhub, no problems at all. My best 100-200 is 6.8sec on BM3 Stage 1 and i drive mostly on CS map. No track days, barely hard driving.

My engine is supposed to have around 30K km but also can have around 60K km as i'm not able to verify / confirm the mileage when i bought it. Engine is 2019 production year and I did 12K km on this engine, always waiting till the temperature is in full operational range before reaching high rpms.

Im curious what do you guys think and if this wear is normal or it was last minute to make replacement.

[IamFODI]

Originally Posted by Jim45678

OK, so here is my story with ROD BEARINGS. I planned to finally install Vargas Spline Lock crankhub fix and made an appointment with my mechanic.

We did the installation but "while we were there" we decided to replace timing belt, chain etc and verify rod bearings. I was surprised that we want to check them in S55 with this low mileage i have but hey, we are already there and i'm not planning opening engine any time soon again. Not sure about my car but at least i don't

So here we are... I already showed these pictures to couple of friends who are more mechanical oriented than me and they all claim it was time to replace them. I read full thread here and especially papasmurf_m3] comment and i'm confused either this wear is typical and is fine or my engine got some beating from previous owner and they look now as they do.

Engine was never opened before, no spun on crankhub, no problems at all. My best 100-200 is 6.8sec on BM3 Stage 1 and i drive mostly on CS map. No track days, barely hard driving.

My engine is supposed to have around 30K km but also can have around 60K km as i'm not able to verify / confirm the mileage when i bought it. Engine is 2019 production year and I did 12K km on this engine, always waiting till the temperature is in full operational range before reaching high rpms.

Im curious what do you guys think and if this wear is normal or it was last minute to make replacement.

The ones where you can still see the grooves are fine.

On the others, take some sandpaper and sand the discolored parts where the grooves have worn away. If the discoloration goes away before you hit copper, the bearing was fine. Otherwise, yeah, replacement was probably a good call.

[Jim45678]

Originally Posted by IamFODI

The ones where you can still see the grooves are fine.

On the others, take some sandpaper and sand the discolored parts where the grooves have worn away. If the discoloration goes away before you hit copper, the bearing was fine. Otherwise, yeah, replacement was probably a good call.

what paper hardness should I use?


PS: How many miles is proper brake-in period after rod bearings replacement? 1000 miles + oil change and I'm ready to hit redline?

my mechanic claims I should drive carefully for about 1500-1800 miles