New head install leaked coolant - page 2 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #15 by Dakotakid on 22 Apr, 2010 22:18
• Exacalackalie!
• #16 by chrisrandle1 on 24 Apr, 2010 23:54
• So I had the crank at TDC for sure.  Now for the cam...It is at TDC when the lock is able to be slid into place on the opposite side of the gear.
  
  So if Pistons 1 and 4 are all the way up and the cam is locked into place I shouldn't have any problems right?
  
  That is how it was.  Now one of the studs wont come out, have to get the right size studd puller on monday.  Anybody know if I can buy one stud from ARP.
  
  -Chris
• #17 by Mark(The Miser)UK on 25 Apr, 2010 03:21
• Quote from: chrisrandle1 on 24 Apr, 2010 23:54

  So I had the crank at TDC for sure.  Now for the cam...It is at TDC when the lock is able to be slid into place on the opposite side of the gear.
  
  So if Pistons 1 and 4 are all the way up and the cam is locked into place I shouldn't have any problems right?
  
  That is how it was.  Now one of the studs wont come out, have to get the right size studd puller on monday.  Anybody know if I can buy one stud from ARP.
  
  -Chris
  

  
  Can't you lock 2 or even 3 stud nuts together on the stud?
  I would have thought, clamping down with a cam lobe out would have caused more of a torrent, than a leak.
• #18 by theman53 on 25 Apr, 2010 04:33
• there should be a hex in the top of the stud you can use a hex key *allen wrench* to remove ther stud. If not double nuting it like the above post should definately work. The studs were only hand tight, correct?
• #19 by chrisrandle1 on 25 Apr, 2010 23:35
• Yes they were installed hand tightned.  The Hex on the top got rounded, and the two nut trick isn't working just sliping, didn't think to try 3.
  
  Thanks again
  -Chris
  Any other ideas why it leaked?  Could I have just screwed up when installing the head?
• #20 by rabbid79 on 26 Apr, 2010 19:44
• Quote

  Anybody know if I can buy one stud from ARP.

  Yes, you should be able to buy just one.  Give their tech support a call for the right part numbers.  The part numbers for single pieces are really weird.
• #21 by Quantum TD on 26 Apr, 2010 21:57
• Was the exhaust manifold on when you installed and torqued the head?  If so, the ears of the manifold might have caught the back edge of the block. In such an instance, your head would not seat to the block, but you'd be able to toque it. The head would be kept off the block, preventing the gasket from sealing.
  
  There is quite a bit of play in the head bolts on the VW diesel, so you have to actually center it and hold it in place when you snug the head down, and be certain that nothing is binding.
  
  I once tried to install a milled head with the exhaust manifold on, and I noticed that the ears (where the manifold bolts to the head) of the manifold projected beyond the surface of the head, and were "standing" the head off the block and preventing a clean mating surface.
  
  The ONLY way you'd have coolant pouring out of a head is if you did this (above), or had a cracked head, or had something between the head and the block. Not even the crappiest headgasket will "pour" coolant out with 90 lbs on the bolts (BTW, I think you can go even higher). Nor will any warped head "pour" out coolant with that much torque on them. I'm sure it would when running under pressure, but not when filling it up.