Results 1 to 4 of 4

Thread: 455 crank

  1. #1
    My crank is 30 under they say it needs turn down40 under . can any body tell me if this
    bad or ok?

  2. #2
    Not a good thing. You may have a tuff time finding bearings..

  3. #3
    Senior Member
    Join Date
    Feb 2009
    SLO POKE, I actually ran my Olds for nearly 20 years on a crank that had been turned .040 under on rods and mains. The only reason I went that route instead of finding another crank was that mine was a Nodular iron unit as opposed to the standard cast iron. If you don't feel comfortable using a crank turned down so far, perhaps your crank grinder/machine shop can get you an exchange unit in a larger size. In any event you should seriously consider having the crank nitrided. Stock Olds is hardened to about .005". Once cut, the hardening is gone. Nitriding will put a hard surface back on the journals-something the Olds really needs.

  4. #4
    i would find a new crank look in any 68 to 70 455 olds they have the N stamped on the crank.

Similar Threads

  1. 427 crank ???? BBC
    By junkyardhunter in forum Gear Heads
    Replies: 7
    Last Post: 09-30-2006, 09:21 AM
  2. Crank ?
    By Taylorman in forum Gear Heads
    Replies: 3
    Last Post: 11-18-2004, 03:01 PM
  3. need a 455 crank
    By RaginRedneck in forum Jet Boats
    Replies: 7
    Last Post: 05-16-2003, 12:52 PM
  4. Crank still not right
    By 396_WAYS_TO_SPIT in forum Jet Boats
    Replies: 8
    Last Post: 03-03-2003, 07:48 PM
  5. what is the better crank
    By joe in forum Gear Heads
    Replies: 4
    Last Post: 09-17-2002, 03:01 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts