BE Bearings removed at 5,130 miles

[UPSROD]

Originally Posted by Doc Oc

The question is, how many RB failures were actually caused by a MB failure taking out the RB? How many mechanics pull the oil pan and rod caps, see a destroyed rod bearing, and never look at the mains?

Usually caused by a super charger!

[doogee]

Originally Posted by deansbimmer

You'd not get much business if that was your model, lol. Turns a $2000 job into a $4500-5000 job.

Yeah but it’ll keep you from dealing with upset customers when the bearings can fail a week later.

[doogee]

Originally Posted by SYT_Shadow

I don't see why. How many main bearings blowing up do we see for each case of rod bearings? 50 to 1?

Impossible to say when our only “data” is what’s posted online

Every S65 I’ve ever seen taken apart has ruined main bearings. And that’s 8 motors.

Oh, and only one of them was supercharged.

[carenthuziast]

Originally Posted by deansbimmer

You guys know that the main bearings aren't a quick job like the rods, right?

estimate cost?

Are OEM bearings lead copper and did bmw? change the material in 2010+ as well?

Does BE offer main bearings as well?

[doogee]

Originally Posted by carenthuziast

estimate cost?

Are OEM bearings lead copper and did bmw? change the material in 2010+ as well?

Does BE offer main bearings as well?

You would have to call shops for estimates. Not cheap whatsoever.

Yes BMW changed the material.

No one offers an aftermarket bearing solution at the moment.

[aus]

Originally Posted by doogee

Impossible to say when our only “data” is what’s posted online

Every S65 I’ve ever seen taken apart has ruined main bearings. And that’s 8 motors.

Oh, and only one of them was supercharged.

Do you have any links or pics of these motors?
I'd like to add to the blown motor registry.
.

[doogee]

Originally Posted by aus

Do you have any links or pics of these motors?
I'd like to add to the blown motor registry.
.

Last time I shared those, an owner got upset.

So no I don't have any to share. Sorry

[MaximusB]

Just out of curiosity... could we not take out the oil filter periodically to check for signs of bearing particles/material? Or would you need to put back in a new filter each time?

Only asking because I know some mechanics like to cut open oil filters during oil change to see the condition of the engine. I think airplane mechanic do that in particular.

[Doc Oc]

Originally Posted by MaximusB

Just out of curiosity... could we not take out the oil filter periodically to check for signs of bearing particles/material? Or would you need to put back in a new filter each time?

Only asking because I know some mechanics like to cut open oil filters during oil change to see the condition of the engine. I think airplane mechanic do that in particular.

You can, but by the time you've got metal in the oil filter big enough to see with the naked eye it may be too late. Instead, suck out a couple oz and send to Blackstone.

[kyrix1st]

Originally Posted by Green-Eggs

The bearings shown above were using OEM rod bolts torqued to OEM specifications.

BE will continue to provide fact based results using real and verified measurements. If people want to call that feeding ignorance and a bad business practice, so be it.

Have you followed the TIS of 5Nm, then 20Nm and angle torque 120 degrees?

What were your clearances when you plastigauged them before torquing down?

[Green-Eggs]

Originally Posted by kyrix1st

Have you followed the TIS of 5Nm, then 20Nm and angle torque 120 degrees?

Yes, all of the BE Bearing measurements are made with OEM bolts and following OEM procedures.
http://wiki.rcollins.org/core/index....5_Rod_Bearings

What were your clearances when you plastigauged them before torquing down?

Bert uses bore gauges and micrometers to measure. I know he did a set with Plastigage, but no idea what it came out to. Plastigage isn't accurate or consistent. One person's measurements won't match another, even with the same crank, rods, and bearings.

[Golddots]

Originally Posted by kawasaki00

I am not new to this game so I will stick with 0-40. But only the Castrol, the Mobil is not as good since switching to the FS version

Hi there.

Which castrol oil are you using? Is it the edge b3/a4? Would you use that 0w40 castrol year round even light hpde use? I live in northern va and I’m on original bearings at 81k.


Thanks!

[groovetek]

Originally Posted by doogee

Last time I shared those, an owner got upset.

So no I don't have any to share. Sorry

You can share the photos without mentioning any names.

You said you've opened 8 X S65 engines, and all had ruined main bearings. This is a massive statement and implies something very serious.

Probably need deansbimmer to reply here to say how many MBs he's done and how many were already ruined...

[Helmsman]

Originally Posted by groovetek

You can share the photos without mentioning any names.

You said you've opened 8 X S65 engines, and all had ruined main bearings. This is a massive statement and implies something very serious.

Probably need deansbimmer to reply here to say how many MBs he's done and how many were already ruined...

Agree, 8 of 8 is a pretty scary number, still I can only recall one or so motor blown due to main bearings. Would be interesting with some more insight here so I have something to worry about after I get my RBs replaced.

[Solo_M_Tech]

This thread hurts my brain. To much speculation, and opinions and imo, very little data.

Ya'll need to stop worrying so much. If you're stressed about everything that could go wrong, how do you enjoy your cars? How?

I have only seen a handful of S65 main bearing failures on the forums over the last few years. I've seen a good deal more rod bearing failures. ( only counting those who's engines catastrophically failed due to bearing failure, not just bad bearing wear examples)

If you're worried about it and can afford to rebuild the S65, do it. Stop worrying. If you can't, and it bothers you so much, sell out and go drive something else.

We are never going to convince mother BMW and her engineers that she did something wrong, bearing related, on the S65.

It would be nice to see the community post more threads about how much they enjoy their cars, and less about " Im worried about muh bearin's..... Go enjoy your car.

[Helmsman]

This is a (of plenty but still) bearing thread Fubar. A ton threads about the way we enjoy our cars as well - go and have a read man!

[doogee]

Originally Posted by Helmsman

Agree, 8 of 8 is a pretty scary number, still I can only recall one or so motor blown due to main bearings. Would be interesting with some more insight here so I have something to worry about after I get my RBs replaced.

Yes its unfortunately the exact same situation with the mains. Every S65 has rod bearing wear and mains always show the same issue. Just a much lower chance of complete failure.

[deansbimmer]

I agree that in the S65 every set of main bearings will be wearing poorly, but the term "ruined" will have different meanings to different people. Every S65 main set I've removed had unacceptable wear just like rod bearings. However out of the couple dozen sets I've had out, only a few were brought to me because they had actually failed.

Seeing as mains don't fail as frequently and their replacement cost by a professional shop can approach the price of a replacement used engine, it's a gamble I'll much more readily suggest than forgoing the rod bearing service.

[Mvy]

Deans right. The mains are the gamble that you probably have to let it ride. From a cost perspective, if you cannot DIY, its just too expensive to justify. In my case I decided that I would just replace the rod bearings, supercharge at 8 years old and just have fun with the car. If I wanted to throw 12 grand into my 10 year old car to do the mains, I would be talking myself into just stroking the motor and fixing this once and for all for 20k.

Just like if you were adding back the stock rod bearings(not additional clearance), I just don't think we have enough info to say throwing new mains in at the stated color BMW says they should be on the motor fixes things. Maybe its worn in enough by now that no further wear is going to happen. Maybe adding new mains starts the wear all over again. Since I made it to 70k miles, OA shows no unusual wear metals over a number of years now, maybe leaving well enough alone is the best advice.

[Richbot]

At some point the poor topends are going to need a refresh after being caned for 200k miles or more. I’d think that’d be an intelligent time to just pull the damn things out and do it all if one were seeking to maintain factory freshness