Crank bolt for JK block: Reuse, AHU bolt, or other? - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Crank bolt for JK block: Reuse, AHU bolt, or other? by TimpanogosSlim on 27 Apr, 2014 15:25
• just noticed i hadn't bought a crank bolt for my rebuild.
  
  I hear that the original 6 point (iic with captive spacer/washer) has been superseded by a 12 point, but i don't have a part number for that.
  
  I know the diesel crank bolts are longer than gassers. GAP and autohausaz don't list a crank bolt for my car (84 jetta 1.6d).
  
  I haven't gone and dug it out yet, but it sounds like it is up to 55mm long according to sources, that may include the spacer length.
  
  Looks like one suggestion is the bolt for AAZ/1y/1z/AHU aka N90577101 -- 12 point skirted bolt, 47mm long, TTY at 60-some foot pounds
  
  I could also just order a class 10.9 m14x1.5 55mm bolt and a thick washer / spacer from Fastenal and torque to the original 140-some ft/lb - this guy: http://www.fastenal.com/web/products/details/11113430
  
  I know reusing the bolt is frowned upon for obvious reasons.
  
  Opinions?
• #1 by TylerDurden on 27 Apr, 2014 15:33
• Quote from: TimpanogosSlim on 27 Apr, 2014 15:25

  Looks like one suggestion is the bolt for AAZ/1y/1z/AHU aka N90577101 -- 12 point skirted bolt, 47mm long, TTY at 60-some foot pounds
  

  
  That's what I use on my 1.6TDs. AutohausAZ has them.
• #2 by vanbcguy on 27 Apr, 2014 17:56
• Definitely use the newer bolt, that's what VW recommended to the dealer service departments. I would be hesitant to use anything but a factory bolt for those as failure has pretty severe consequences and I'd rather leave the engineering to an actual engineer in this particular case.
  
  Sent from my HTC One XL using Tapatalk
• #3 by TimpanogosSlim on 27 Apr, 2014 21:10
• Alright. I'll call the stealership in the morning.