Colour code Crankshaft and conrod bearings.

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Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 22. Jun 2014, 21:41

Hi guys

where can i find wich Bearing colour codes i need to get matching my crankshaft and conrods?. im currently rebuilding my 2.5-16V engine and i want to order new bearings shells, but i cant seem to find any info on the engine block or on the crankshaft.

thanks for the help guys !
wesley
Cloudini
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Hubert » 23. Jun 2014, 15:03

Hi,

afaik the only thing you need to know is the size of the crankpin, before buying conroad bearings.

If its not grinded down to the next repair stage, there is no reason using other bearings than standart.

The main bearings should be marked by the factory, so you need to clean the bearings carefully and look at them. then you order the same by colour.

But in every case you have to measure the clearance with plastigauge or something like this.

Thats the way I did, and if i remember right, its also the way WIS recommends.
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 24. Jun 2014, 22:46

it is not stamped in the crankshaft what the size of the crankpin should be from factory right ?
and there is an mercedes mark on the bearing cap but how can i see what colour that is ?
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Hubert » 25. Jun 2014, 17:04

Hi,

no, size isnt stamped in, imho.

The matching color should be indicated with a dab of paint on any side of the bearing shell.

Hope you didnt wipe it away.
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 11. Nov 2014, 21:13

well it has been a while, but i havent wiped or cleaned the bearing caps yet But i cant see any colour on it, so that means im screwd ?

is there no other way to figure this out ?
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 14. Nov 2014, 00:30

i have been looking with my nose

ive found green dots on the crankshaft (wich i think where blue in the past ?)
so that means 58mm blue color bearing caps for the crankshaft if someone can confirm this for me ?
and if i mount the new bearing shells i need to check with plastigage, what thickness should really be the oil film play ?
Old bearings on the crankshaft had the numbers 102-5101 and 102-5002 (if i match this numbers with the new ones the same is that safe aswell?)


and speaking of the conrods
i couldnt find any dots on them except for on the caps (watch the picture) can i thrust this color ? cause there is so much parts in the engine block that has red paint.
these had the bearings numbers : 102-4210 and 102-4211

let me know your thoughts.
tnx
Wesley
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 16. Nov 2014, 17:24

this is what ive found on WIS but i dont actually get it yet, i do have 2 punch marks at every bearing seat on the crankcase as shown in this picture
but i dont really get this schematic,
how i read it is i have blue dots on my crank (i quess, its actually greenish) so it could be blue, color number 52, matching 2 punch marks everywhere wich is yellow? so i need yellow bearings wich are number 54 ?
or am i doing this really wrong ?
cause if i have yellow dots its still 54 with 2 punch marks wich is also yellow bearings ?

your thoughts thank you :)


Kurbelwelle-crankshaft.jpg



Edit by Henger: Bild als Dateianhang eingefügt.
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 26. Jan 2015, 00:25

hey friends,

im still havent figured out this issue,

does anybody know the Tollerance of oil clearance between bearing cap and crankshaft for the crankshaft itself and the crankcase, and for the conrod and crankcase ??
if i know an oil film clearance, or oil clearance than i can just measure the right bearings with plastigage.

i cant find anything in WIS (maby im searching wrong ?)

thanks
Wesley
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Hubert » 29. Jan 2015, 01:37

Hi, the clearance of the crankbearings for the engine #102.983 should be 0,025-0,045. wear limit is 0,07mm.

gauging out the clearance of the engine #102.990/991/992 is not needed, WIS said.

I think you're right by orianting the clearance of the .983.
I read the WIS document for "bearing out the crankshaft", but I'm not familiar with matching out the bearings with the color-code.
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Re: Colour code Crankshaft and conrod bearings.

Beitragvon Cloudini » 10. Mär 2015, 20:33

hi
Tnx Hubert for your information,
ive emaild Thorsten Stadler, and he gave me this information :
The clearance at the crankshaft should be 0,035 to 0,055mm. The clearance at the conrods should be 0,035-0,05mm.

so that should cover my awnser and it also is pretty much the same as your awnser ! so im very happy with that one,

but now my other problem :(
in Holland at All Mercedes Dealers. they cant suply me on the crankshaft bearing cap bolts (A102 011 04 71) they are not available anymore.
does anyone know where i can get them outside the netherlands ? are these bolts being used in any other car ?

i need 6 of them.
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