Board member AWE46M3 Rod-Bearings Service/Concept

[ChapterM3]

Anri at it again! So happy to see this - Nick I'm really excited to see how this car comes out and finally back on the road to enjoy

[AWE46M3]

Anri at it again! So happy to see this - Nick I'm really excited to see how this car comes out and finally back on the road to enjoy

Thank you, Jonathan! Enjoying the play by play and discoveries along the way. Life would be much easier if we got these things brand new, but here we are 😄

[Anri]

Time for G420 re-seal. The typical leak from the cases.
New seals, Replacing the broken spring.

[bmwfnatic]

Time for G420 re-seal. The typical leak from the cases.
New seals, Replacing the broken spring.

Nice, also good time to clean the magnet.

[George Hill]

...Replacing the broken spring.

I don't think I've ever seen this spring broken on a MT, its always the SMG. Thanks for the data point!

[chris719]

That is correct, micro scoring establishes when cars are not driven often meaning say ones a month
sort of how collectable cars are. By the time the oil builds solid film little at a time it causes micro scoring.

Cars in cold climates with the combination of the 10W60 are the worst combo. This is why I like 5W50
0W50, 5W40 oils. 10W60 is way too thick in cold climate or long term storage dry start.

Regards,
Anri

Anri, this is excellent information, thank you. What do you think of the King XPC bearing which is coated without the loss of clearance since it is designed in?

I realize you recommend HX clearance, but if STD do you still think ACL is better than the Glyco OE?

[usdmej]

WPC has absolutely no benefits whatsoever from any point of view for bearings. I have proved
this times and times again.

just in this case or bearings in general?

would you recommend WPC treatment for anything else?

[Anri]

Anri, this is excellent information, thank you. What do you think of the King XPC bearing which is coated without the loss of clearance since it is designed in?

I realize you recommend HX clearance, but if STD do you still think ACL is better than the Glyco OE?

Hi,

Thanks for your reply.

Both works. OEM, OE/Glyco nothing wrong. But it's not optimum, look at the picture
I posted, OE Glyco with around ~1000miles.

As long as the King coated bearings have min of 0.050mm oil clearance then
you are good. But if they have 0.038mm then ehhh not ideal.


Regards
Anri

[Anri]

just in this case or bearings in general?

would you recommend WPC treatment for anything else?

I like to try stuff, abuse it and then take it apart and draw
conclusion.

You can not believe money I have spent on testing stuff
simple stuff like bearing coating to the right sealant etc..

On my track S38 engine I have shim under camshaft followers.
I decided to treat them to try it. All nice and smooth...Installed
them went to break in the cam on the street did some pulls. After
about 100mile before I went to the dyno to tune it I removed the
valve cover to inspect them. I removed the cams and inspect the
the entire bucket. Absolutely nothing I mean nothing was left.
Means the way I sent them before treatment is how I found them
after 100miles.

Took all 24 followers vapor blast them and sent them to DLC
coating.

DLC-REM for the win!

Regards
Anri

[Anri]

Da G420 re-seal is done.

Moving forward.

[sapote]

I don't think I've ever seen this spring broken on a MT, its always the SMG. Thanks for the data point!

Any ideas why not happen on MT?
The robot shifted too forcefully too fast?

[bmw m3 s50]

Obviously, ones the oil pressure is build the journal does not touch the bearing. its been
like that since combustion engines are around...



That is correct, micro scoring establishes when cars are not driven often meaning say ones a month
sort of how collectable cars are. By the time the oil builds solid film little at a time it causes micro scoring.

Cars in cold climates with the combination of the 10W60 are the worst combo. This is why I like 5W50
0W50, 5W40 oils. 10W60 is way too thick in cold climate or long term storage dry start.


Regards,
Anri

Do you recommend cars in cold climates that are rarely driven maybe 3-4-5K miles a year, stored over the winter and stored in a somewhat temp controlled garage, be started once a month for a minute or two to get the oil moving around? Or even idling until oil gets warmed up?

[BRiley]

Do you recommend cars in cold climates that are rarely driven maybe 3-4-5K miles a year, stored over the winter and stored in a somewhat temp controlled garage, be started once a month for a minute or two to get the oil moving around? Or even idling until oil gets warmed up?

This is empirically a bad idea. Used oil analysis shows it's far better to just let the car sit versus cranking it once in a while. Especially if you're not going to get it to operating temp.

[bmw m3 s50]

This is empirically a bad idea. Used oil analysis shows it's far better to just let the car sit versus cranking it once in a while. Especially if you're not going to get it to operating temp.

Well, I guess meant letting car to get to operating temperature when starting the car.

[Slideways]

Well, I guess meant letting car to get to operating temperature when starting the car.

You want to drive it a few seconds after startup. Starting up and letting it idle to warmup, especially on an engine that has not been started for a long period of time (weeks/months/years), is not a great idea. The excess fuel on cold start can wash the bores and dilute the oil.