Good video on engine break in, including the usefulness of bearing break in

[Obioban]

https://www.youtube.com/watch?v=zg6xa2caG-I

C8 Z06 engine engineer talking about the usefulness/function/benefit of bearing break in ~5:25

[stephen]

Woops. I had the rod bearings done in my M5. Sent it as soon as the oil was up to temp.

[George Hill]

You just opened a can of worms, lol.

My shops policy is to follow the BMW recommendation from when the RB service action was in play.

[Icecream]

You just opened a can of worms, lol.

My shops policy is to follow the BMW recommendation from when the RB service action was in play.

I think he closed it actually.

[George Hill]

I think he closed it actually.

Maybe for the people who already followed the idea of a rod bearing replacement... but I doubt one engineers blurb is going to change the minds of the "bearings don't have a break-in, you idiot" personalities.

With that said I could get behind that logic, but to know definitely I'd want to hear something similar from multiple sources.

[Jimbo's M]

Besides the initial break-in, I had to do the SA twice. I followed the procedures to the letter, not just because I certainly think BMW engineers know just a touch more than me, but also because I didn't want my warranty voided if I deviated from said break-in.

BTW, do any other BMW's since the E46 M require this? I have no idea..

[cobra]

This video is full of anecdotes with no data to back up any of these statements.
"Thermal shock"
"High temperatures"
"Variable load"
"200-300 miles"
relative to... what?

There is nothing you can realistically do to damage or benefit the engine if you're being a normal person and running it within normal operating conditions.

Performing a special break-in procedure at X RPM for X number of miles is a waste of time.

[jet_dogg]

I'm definitely going to listen to a random dude on the internet with a shiba in his avatar versus a mechanical engineer in the field.

Disclaimer: I didn't watch the vid 👺

[fattycharged]

I vote operating temp and send it


Sent from my iPhone using Tapatalk

[liam821]

That's how I've always done all the engines I've built. Bring up to temp on break-in oil and heat cycle, oil change, then it gets broken in on the dyno.

[JudahJD904]

im in the process of doing my rod bearings , when i finish i planned on doing the 1,200 mile run in service that requires the engine to stay below 5.5k rpms. gotta mate those surfaces.

[Bry5on]

I'm definitely going to listen to a random dude on the internet with a shiba in his avatar versus a mechanical engineer in the field.

Disclaimer: I didn't watch the vid 👺

But.. if the random dude on the internet is also a mechanical engineer in the field

[cobra]

I'm definitely going to listen to a random dude on the internet with a shiba in his avatar versus a mechanical engineer in the field.

Disclaimer: I didn't watch the vid 👺

Shiba dude on the internet being skeptical
or

90 year old Chevy engineer saying "you gotta bed in them surfaces!"

[Amos]

Ok I am at 500 kilometers since getting my rod bearings replaced and I'm itching to hit the red line, just put it my Eventuri intake. Will my engine blow up or not

[Slideways]

It's a dog-eat-dogg world out there