Identify Main Bearing

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Identify Main Bearing

Post by EngineerTEN on Tue Jun 16, 2009 11:43 pm

Could someone please identify the main bearing size for me? It is an original vw part # 131.105.531

Thanks,
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Re: Identify Main Bearing

Post by 71_georgia_beetle on Tue Jun 16, 2009 11:54 pm

65.0mm O.D
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Re: Identify Main Bearing

Post by EngineerTEN on Wed Jun 17, 2009 3:12 pm

Thanks Scott,

Where did you find that? So 65MM OD refers to the case line bore? I know the crank is standard or should be as the rod bearings are std.

I am trying to identify the correct replacement main bearing set using a rebuilt crank .25mm. The question is, what is the line bore?

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Re: Identify Main Bearing

Post by 71_georgia_beetle on Wed Jun 17, 2009 11:36 pm

Sorry, I thought you meant physical size. I found it on Old Volks and confirmed on three other sites. Not sure about the rest of you questions.
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Re: Identify Main Bearing

Post by EngineerTEN on Thu Jun 18, 2009 12:22 am

Hmm...

I measured the outer diameter of the bearing. Looks like about 2.57"

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Re: Identify Main Bearing

Post by EngineerTEN on Thu Jun 18, 2009 12:37 am

If the bearing diameter is 65 mm, what is the standard bore size?
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Re: Identify Main Bearing

Post by 71_georgia_beetle on Thu Jun 18, 2009 9:57 am

EngineerTEN wrote:Hmm...

I measured the outer diameter of the bearing. Looks like about 2.57"
=65.27800 millimeters
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Re: Identify Main Bearing

Post by Clyde on Tue Jun 23, 2009 11:01 pm

Sorry, all my T1 mains are numbered 111 198 4_ _
T4 are 021 198 4_ _

I'd just measure what you have and convert to MM.

Std case is 2.560"
Std crank is 2.165"
std thrust is .867"
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