Re: [Chrysler300] crankshaft

["George Riehl" <longrams@xxxxxxxxxxxxx>]

Ah, hah! Excellent question! You can tell a balanced crank by the "extended" (1/2" to 5/8") castings on the 4 rod journal throws.  One will see something that looks like "chisel" marks on the machined end surface. Those marks are done by the balance machine, generally 3 to 4 "marks".  That means the crank has been balanced to spec. An unbalanced crank will not have the journal extensions or any marks, but it will have "machineing"  on the large counterweights. Balanced cranks will also have machineing on the counterweights more radical than the cast cranks. 
   George



  ----- Original Message ----- 
  From: Rich Barber 
  To: 'George Riehl' ; 'Jonnie' ; chrysler300@xxxxxxxxxxxxxxx 
  Sent: Tuesday, December 18, 2007 10:07 PM
  Subject: RE: [Chrysler300] crankshaft


  Thanks to George for another quick and accurate answer to a burning
  question. Now, I'm curious as to whether the journals are machined and
  polished before and/or after heat treating??? And, how do you tell the
  difference between standard and high-performance cranks? Are different part
  numbers stamped somewhere on the crank??

  That precision balancing explains why it idles so sm-sm-sm-smooth. She does
  level out soon after coming off the idle stop, though!!

  C-300'ly,
  Rich Barber
  Brentwood, CA (the rainy season finally got here--we need it)

  -----Original Message-----
  From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
  Behalf Of George Riehl
  Sent: Tuesday, December 18, 2007 4:10 PM
  To: 'Jonnie'; chrysler300@xxxxxxxxxxxxxxx; Rich Barber
  Subject: Re: [Chrysler300] crankshaft

  Rich; Just had this discussion with a Club member.........both cranks are
  forged.......300, marine and industrial crank bearing journals are flame
  hardened to .060, New Yorkers and Imperials are not hardened. Other than
  that, both are the same in dimentions and interchangeable. Tri-metal bearing
  used on hard cranks, Non tri-metal bearings used on the others.
  George Riehl

  ----- Original Message ----- 
  From: Rich Barber 
  To: 'Jonnie' ; chrysler300@xxxxxxxxxxxxxxx 
  Sent: Tuesday, December 18, 2007 4:32 PM
  Subject: RE: [Chrysler300] crankshaft

  Just curious. Is there any difference between a 1955 C-300 crank and one
  from a NY or Imp? 

  C-300'ly,
  Rich Barber
  Brentwood, CA
  1955 C-300 

  -----Original Message-----
  From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On
  Behalf Of Jonnie
  Sent: Tuesday, December 18, 2007 1:12 PM
  To: chrysler300@xxxxxxxxxxxxxxx
  Subject: [Chrysler300] crankshaft

  Does anyone out there have a 55 C300 crankshaft they would like to sell
  ?-----Johnnie Slayton

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