Rant: Head Bolts

[rocco16v at netzero.net (L F)]

Bolts should accept design torque, even if they are bottomed out. (torque is torque)
Either the bolt (that broke) or the torquing process was flawed.

Larry
  ----- Original Message ----- 
  From: Eric S 
  To: Patrick Bureau 
  Cc: scirocco-l@scirocco.org ; 'Krazy Horse' 
  Sent: Monday, January 26, 2004 9:39 AM
  Subject: RE: Rant: Head Bolts



  And, please please tell me you cleaned, then cleaned again, then cleaned 4
  more times the holes in the block.  Breaking bolts is quite common if
  those holes aren't spotless...if any oil is in there, you'll hydraulicly
  lock the bolt as you turn it down (trying to compress the oil in the
  hole), breaking the bolt.

  -- 
  Eric
  www.vintagewatercooleds.com

  79 VW Iltis
  81 Rabbit Truck 2.0 16v
  81 Scirocco S (TDI Swap project)
  90 Corrado TDI
  91 Cabriolet (2.0 Crossflow swap project)

  Patrick Bureau said:
  > And you used NEW headbolts right ?
  >
  > ATS - Patrick Bureau -  85 2L, 102.5 whp, 121 ft/lbs torque
  > Email : ats@longcoeur.com - Web site : http://ats.longcoeur.com
  > AIM: texasscirocco - Yahoo: atsgtx - ICQ: 32918816 - MSN:
  > atsgtx@hotmail.com
  > 1975, 77, 78, 79, 80, 81S, 82 and 86 coming soon!
  >
  > -----Original Message-----
  > From: scirocco-l-bounces@scirocco.org
  > [mailto:scirocco-l-bounces@scirocco.org] On Behalf Of Krazy Horse
  > Sent: Monday, January 26, 2004 2:29 AM
  > To: scirocco-l@scirocco.org
  > Subject: Rant: Head Bolts
  >
  > So I pulled the head and replaced the broken exhaust studs, gaskets and
  > did
  > some clean up to the internal workings of the engine. All is going well,
  > the
  >
  > head is back on and its time to put the head bolts back in.
  >
  > Look in the bentley for the torque specks and it says "44ft. lbs and 1/2
  > turn (180 degrees)" Get out my torque wrench and st it for 44ft lbs. I
  > proceed to torque all of the bolts; all is still well. I then start in on
  > the 1/2 turn for the bolts. Of the 180 degrees that I have to tighten I
  > get
  > to about 176 and...
  >
  > *SNAP*
  >
  > Broke a f*cking bolt. I long string of profanity and I start to feel a
  > little better, but still pretty pissed off. I tighten all the other bolts
  > just fine. I know have the bolt in my hand taunting me, what a pisser.
  >
  > Grrrrr...
  >
  > -Craig
  > "Nightmare" '88 16v (PG-T Proj.)
  > "Calypso" '91 Golf GL (Daily Driver)
  >
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