Crank bolt removal? - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Crank bolt removal? by westcoaster on 01 Jan, 2008 19:28
• I'm in the process of stripping down the 1.6TD for rebuild.
  
  The bolt on the crank... Is that a left hand loosen or a right hand loosen? (I wasn't able to get it to budge...)
  
  Injector pump sprocket removal.... Any tips on this?
  I put a puller on it and tried tapping with a hammer. So far, no go...
  
  
  Thanks,
• #1 by vanagonturbo on 01 Jan, 2008 19:34
• lefty loosy
  
  on the IP get a good puller and slightly tap on the bolt part of the puller when its under a fair amount of tension.
• #2 by CoolAirVw on 01 Jan, 2008 19:56
• An impact is nice.
  
  If you have the stretch bolt and no impact then you need something to hold the crank in place.  
  
  In the following thread (vwdieselparts.com/forum) there is libbybapa's crank holder.
  
  http://www.vwdieselparts.com/forum/viewtopic.php?t=771&postdays=0&postorder=asc&start=30
  
  There's also some improvised pump pully methods in the same thread.
• #3 by westcoaster on 01 Jan, 2008 20:17
• Brahahahaha!!!!
  
  Here I thought my weak knee impact gun was going to do damage to the sprocket bolt....
  
  What I really need is a whole lot of leverage!
  
  
• #4 by saurkraut on 02 Jan, 2008 06:26
• Alternatively, set up the gas axe, and an impact with the correct socket close at hand.
  
  Fire up the gas axe.  Heat the head of the bolt until its just starts to turn red.  Shut off the torch and immediatly apply the impact wrench.  Typically they pop right out.
  
  When I put the bolt back in, I put on a big gob of red Loctite, and wack it back in with the impact.
  
  I know it sound primitive, and the bolt may become tempered, but I haven't had a failure yet, and I've done it hundreds of times.
• #5 by commuter boy on 02 Jan, 2008 07:12
• Shouldn't be re-using the bolt anyways, it's a stretch bolt.
  
  I'd be more worried about doing something to the crank, I suspect it would be less tolerant of heat cycling than the bolt.
• #6 by bert on 02 Jan, 2008 12:24
• Especially on a AAZ  
  Bert
• #7 by CoolAirVw on 02 Jan, 2008 19:26
• I'll second the stretch bolt and proper torquing procedure.
  
  12 point bolt is a stretch bolt.  Dont reuse it.
• #8 by westcoaster on 02 Jan, 2008 20:00
• Ok,
  now I'm getting confused.....
  
  The head on the 1.6TD crank bolt didn't appear to be any different than any other bolt. (6 points)
  Is it a streach bolt still?
• #9 by Vincent Waldon on 02 Jan, 2008 20:11
• Quote from: "westcoaster"

  Ok,
  now I'm getting confused.....
  
  The head on the 1.6TD crank bolt didn't appear to be any different than any other bolt. (6 points)
  Is it a streach bolt still?

  
  
  Yeah... it's a bit confusing.. but it's mostly just a historical difference.
  
  The original OEM bolt on the early series of 1.5 and 1.6 diesels had six sides (and wasn't a stretch bolt iirc) but the replacement bolts for the 1.6 series and *all* of the 1.9s are an improved design 12-point stretch bolt.
  
  If you buy a new crank bolt for any VW diesel at the moment they will hand you a new and improved 12-pointer.