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RE: [T3] Crankshaft Specs...???


On 22 Apr 2002, at 11:29, Jaranson, John (J.W.) wrote:

> OK.....I checked the digital caliper that I borrowed from the Lab at work to
> take these measurements.  I used a 50mm gage block and measured 49.93mm.  Makes
> up for most of the error in my measurements.  Looks like the cranks is in good
> shape.  The journals look good, no scoring, still nice and shiny.  Cool!

> I just assumed that the 0.10mm under was just normal wear on a crank with 70k
> miles.  Never thought to check the measuring tool.  Thanks for the advice.

Nice when one of my long shots hits the mark, cool!

> I did ask Berg about welding CW to my crank.  $150, but only done when ever they
> get to the next batch of cranks, so it might not be too timely.  Can the stock
> crank be dynamically balanced or is this pointless?  For a daily driven,
> basically stock engine, is tha CW crank really worth $150?  How's that for a
> loaded question?

Very loaded, but the high RPM flexing crank is the most damaging thing in 
your engine. This is the second thing I would do to any rebuild that might see 
"spirited" driving. The first would be a full flow oil filter.

The stock crank can be dynamically balanced, but only the CWs will keep 
the flexing down at high rpms.

-
Jim Adney
jadney@vwtype3.org
Madison, WI 53711-3054
USA

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