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  #1  
Old 07-22-2002, 05:57 PM
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Location: Atlanta, GA
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Need tech info M103 engine

I need to know if I need oversized main and rod bearings. I cannot find this information anywhere!!! I just spend $80 on an official mercedes benz service manual and it wasn't in there. Can anyone help me out? What is the standard journal diameter and when does it require oversizing? I have already measured my crank...i just need data to compair it too. Thankyou!
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  #2  
Old 07-22-2002, 06:50 PM
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Location: Tucker, Ga USA
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Standard size main crank journal is 57.950 to 57.965mm.
Std size rod journal is 47.935 to 47.955mm.

There are 4 repair sizes for either, mains or rods in .025mm increments.

.06mm clearance on the mains would be max.
.04mm clearance on the rods would be max.
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  #3  
Old 07-22-2002, 10:07 PM
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Thankyou Pat, I appreciate it!
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  #4  
Old 07-22-2002, 10:20 PM
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I have figured out that I can stay standard on both my main and rod bearings...can I just assume that my thrust bearings are standard too? If not, can you give me those clearances too?
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  #5  
Old 07-23-2002, 09:21 AM
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The standard size of the thrust bearings is 2.15mm & the clearance(endplay) is 0.10 to 0.20 mm.
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MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
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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  #6  
Old 07-23-2002, 11:15 PM
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I don't suppose you could tell me the stock thickness of the head gasket...could you?
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