Preparing a HYDROLIC! CY engine for boost - page 2 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• #15 by Powered by Spearco on 09 Nov, 2010 08:07
• Um, you have to  .
  I blocked the drain in the head with an aluminum plug.
  I blocked the coolant hole on the block with a chunck of rubber.
  I'm pushing 30psi of boost, and it holding just fine.
• #16 by zukgod1 on 09 Nov, 2010 09:31
• I've been there as well.
  
  Used a Hydro head on a solid block.
  
  I welded up the coolant passage in the block and welded the hole in the head up.
  
  Drilled the head and block for the extra AAZ coolant holes.
• #17 by Powered by Spearco on 09 Nov, 2010 21:02
• The AAZ head has the smaller steam holes already and its the block that you drill out.
  
  Thats what I did.