BAM Crankshaft Tolerances

[hoffmanvp3]

Just a quick one chaps.
Does any one with ElsaWin spare a few minutes and tell my the various service limits to the BAM crank shaft?
I believe VAG offer a over size shell for the crank casing section if they require over size machining? The yellow shell?
And vise verso with the connecting rod section of the crank.

Cheers much appreciated.

 

[russwuss]

I might be able to help you tomorrow mate.. waiting for my copy to arrive (due anytime...)

that's if no one replies today.

 

[cooper86]

hopefully this is what your after, for a bam engine code

Crankshaft dimensions Up to approx. 05.2000

Honing dimension (in mm)	Crankshaft main bearing journal Ø	Conrod bearing journal Ø
Basic dimension	54.00	–0.022 –0.042	47.80	–0.022 –0.042
1st undersize	53.75	–0.022 –0.042	47.55	–0.022 –0.042
2nd undersize	53.50	–0.022 –0.042	47.30	–0.022 –0.042
3rd undersize	53.25	–0.022 –0.042	47.05	–0.022 –0.042

From approx. 05.2000

Honing dimension (in mm)	Crankshaft main bearing journal Ø	Conrod bearing journal Ø
Basic dimension	54.00	–0.017 –0.037	47.80	–0.022 –0.042
1st undersize	53.75	–0.017 –0.037	47.55	–0.022 –0.042
2nd undersize	53.50	–0.017 –0.037	47.30	–0.022 –0.042
3rd undersize	53.25	–0.017 –0.037	47.05	–0.022 –0.042

 

[hoffmanvp3]

Thats part of the info im after.
Was there any more info that came with those Dims Cooper? how to`s e,t,c
Cheers

 

[cooper86]

Thats part of the info im after.
Was there any more info that came with those Dims Cooper? how to`s e,t,c
Cheers

That was the only info in that section for the crank, i'll check for any more tonight tho when i get home ;-)

 

[<tuffty/>]

How to's? as in checking tolerances? you use plastigague for that...

Plastigauge - The Accurate Way to Measure Bearing Clearances...

<tuffty/>

 

[hoffmanvp3]

Thanks cooper
Some thing to do with the colour coding of the OEM replacement bearing shells for the crank and con rods.
Basically if my crank is needing machined due to ware then i need the info on what size to machine it down too the the appropriate dim then there is a range of OEM replacement bearing Shells to use after the machining had been completed.
Hope that made sense lol.

cheers

 

[badger5]

hopefully this is what your after, for a bam engine code

Crankshaft dimensions Up to approx. 05.2000

Honing dimension (in mm)	Crankshaft main bearing journal Ø	Conrod bearing journal Ø
Basic dimension	54.00	–0.022 –0.042	47.80	–0.022 –0.042
1st undersize	53.75	–0.022 –0.042	47.55	–0.022 –0.042
2nd undersize	53.50	–0.022 –0.042	47.30	–0.022 –0.042
3rd undersize	53.25	–0.022 –0.042	47.05	–0.022 –0.042

From approx. 05.2000

Honing dimension (in mm)	Crankshaft main bearing journal Ø	Conrod bearing journal Ø
Basic dimension	54.00	–0.017 –0.037	47.80	–0.022 –0.042
1st undersize	53.75	–0.017 –0.037	47.55	–0.022 –0.042
2nd undersize	53.50	–0.017 –0.037	47.30	–0.022 –0.042
3rd undersize	53.25	–0.017 –0.037	47.05	–0.022 –0.042

interesting how the tolerances vary with model year?
wonder why?

 

[hoffmanvp3]

well mines a 2003 BAM S3 so im guessing the 5.2000 on wards is me
I guess i`ll just hope my cranks journals are within sped when i strip the motor.
Its had a full service history so im guessing the shells will ware first.
I`ll be plasti-gauging every journal just to be safe.
Does every one just use the green one?
Cheers

 

[hoffmanvp3]

looks like i just answered my own question
Plastigauge PL-X

For measurements of:0.018mm to 0.045mm

 

[cooper86]

I got a green set unused if your after plastigauge

 

[hoffmanvp3]

Isn't is supposed to be the white?
The PL-X plasi gauge Cooper?
Thought the green wasn't small enough graduations?

 

[cooper86]

Not to sure on the measurements or even if it is a green set, its been sat in my tool box for awhile, will check what set it is an the measurements tomorrow when i'm in work an let you know ;-)

 

[cooper86]

Also if you search on youtube for "1.8 20v assembly" theres a guy that has done 4 or 5 videos of him rebuilding a 20v engine, which shows everything including fitting rings, rods, big ends and honing an measureing the tolerances an ring gaps. Its quite a handy couple of videos to watch ;-)

I'll try an find the link for you

Edit:

Link found
http://m.youtube.com/results?q=1.8 ....1ac.1.23.youtube-reduced..18.0.0.J72zMu-WsCw

Its the second one down, 6 videos in total but only 5 to do with the assembly

 

[hoffmanvp3]

Thanks for that Cooper.
Yea i`ve been watching those videos for dinner for the last month lol.
My brother being a machinist and me being an engineer off shore we can fabricate just about any thing
I really need to get the Elsawin Cd`s

 

[cooper86]

Thanks for that Cooper.
Yea i`ve been watching those videos for dinner for the last month lol.
My brother being a machinist and me being an engineer off shore we can fabricate just about any thing
I really need to get the Elsawin Cd`s

Yea i watched them a few times aswell before i started my rebuild lol. Yea the elsawin program is a massive help, i got mine when i had my A8 but didnt really use it that much, now that i got the S3 tho i'm using it all the time lol

 

[hoffmanvp3]

yea i made the mistake of buying it off the net to download it and it so big(that's what she said),25GB its usually corrupt when you finished downloading it
The company has re linked me to the download link and i`ll try again when im home.
Deff gonna buy the CD of Flea bay as its on 5 quid more