F2X Con Rod bearing Code.

[Dumaurier7]

Hi all, I am currently gathering the required parts to do a crank hub upgrade along with the S55 oil pumps and sump swap, whilst there I'd like to do the con rod bearings too, I know the motor bearing combination codes are stamped on the crank but is there another way to get this information BEFORE pulling things apart so that I can have them in hand before I start? I don't want to have her down whilst waiting on parts!

 

[Dumaurier7]

Hmmm... No response so I guess the isn't another way ! guess I'll have to a bearing inspection and oil pump/sump upgrade before tackling the hub and con rods.

 

[9krpmrx8]

No I do not think you can get that info without pulling the pan. But you can just run standard size aftermarket bearings.

 

[NoQuarter]

Videos I have seen dont suggest it is necessary to know that info prior. Shops take them apart and install them same day.

 

[Dumaurier7]

I would hate to think BMW went through all that trouble for no reason at all!

 

[9krpmrx8]

 

[Dumaurier7]

View attachment 47419

Yes, this is what I'm referring to but its only accessible when the crank case is dropped which SUCKS bigtime!

 

[Bmw63]

Yes, this is what I'm referring to but its only accessible when the crank case is dropped which SUCKS bigtime!

On the side of the block are codes like BBAAAB which refer to bearings, Im just not sure if they refer to mains or rods

 

[Dumaurier7]

Ok

 

[Dumaurier7]

Can you specify which side? Don’t want to do extra work for no reason.

 

[Dumaurier7]

On the side of the block are codes like BBAAAB which refer to bearings, Im just not sure if they refer to mains or rods

Based on what I’ve seen the numbers are the crank mains and the letters refer to the connecting rods.

 

[9krpmrx8]

 

[Dumaurier7]

That shit is confusing!

 

[Dumaurier7]

It I think it refers to the crankshaft upper and lower bearings.