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Old 08-13-2007, 04:52 PM
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Question Help identifying m103 rocker arm types

My camshaft has some wear, I have established that Brabus reprofiled the original M103 camshaft for more lift. My camshaft has the mercedes stamp followed by "103" and "22" below that, on the other side "AE2". My chassis number tells me that my camshaft is of the later, chilled cast iron type.
I want to know how to identify the rocker arms that accompany these as a MB breaker friend of mine has some good ones. Did the bearings change or just the rockers? What numbers should I look out for stamped on the rockers.

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Old 08-13-2007, 05:21 PM
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Modified rocker arms have a 2MM thick hardened material WELDED to the surface of the rocker where it contacts the cam.
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Old 08-15-2007, 09:26 AM
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Thank you M.B. Doc. It looks like my car does have the older style without the inserts afterall? What material was this? The pics also show the mod Brabus did to get manual lifters into the M103 rockers. They pressed in and welded a cylindrical piece of metal which was tapped to allow a screw type valve adjustment similiar to the early m102 cars.
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Old 08-15-2007, 09:46 AM
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Hardened cast iron... Make sure to put those rockers back on the SAME cam lobe they were removed from. otherwise....

You might think about having those surfaces polished & "hardened" by a cam re-grinder.
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ASE Master Technician
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44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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  #5  
Old 08-15-2007, 02:59 PM
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A camshaft grinder will be re-grinding my Brabus camshaft for the same lift although my engineer is in touch with him, not me. I assume if my engineer sends my rocker arms to him he can save my rocker arms?

To answer my own question, yes, to the tune of 196+VAT for the rockers, my camshaft re-profiling is costing me 225+VAT.


Last edited by brabus3.6; 08-16-2007 at 03:25 PM.
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