Excessive crankcase pressure - need a quick and dirty fix! - Troubleshooting - VWDiesel.net The IDI, TDI, and mTDI source.

• Excessive crankcase pressure - need a quick and dirty fix! by MikkiJayne on 28 Dec, 2007 04:16
• Hi all,
  
  My 1Z has way too much crankcase pressure. It can make the oil filler cap hover above the valve cover at idle, and blows oil out of every gasket and seal at an alarming rate.
  
  I know the prime suspect for this is rings, but thats not an option right now so I'm looking for either alternative causes (turbo?) or quick and dirty fixes! I just want to stop the oil leaking while I build up an AHU for it.
  
  I'm thinking about the New Beetle oil breather but any other suggestions are welcome  
  
  Tia, Mikki x
• #1 by burn_your_money on 28 Dec, 2007 08:24
• That rubber hockey puck looking thing on the valve cover could be plugged. Start there, it's cheap and easy
• #2 by MikkiJayne on 28 Dec, 2007 11:33
• Thanks but I've tried that already  :wink:  The crank breather is also fine.
• #3 by jimfoo on 28 Dec, 2007 12:07
• No quick and dirty fix for bad rings, though lowering the fuel and boost will somewhat reduce the blowby.
• #4 by giulianot on 28 Dec, 2007 14:13
• This happened to my 1.6 na diesel cabby and what i did was i took the plate off the crank case breather on the block  (located right beside the oil filter housing) held on by 2 m6 allen bolts. i then drilled and tapped a 1/2 " hole in the plate and installed a barb fitting. from the fitting i ran a 1/2" tube to the intake. (Or vent to atmosphere ). that stopped oil from blowing out the dipstick..... Temporarily good luck :wink:
• #5 by Vincent Waldon on 28 Dec, 2007 16:55
• Here's some discussion that starts off talking about the stock AAZ breather but ends up talking about adding a second breather generically:
  
  http://www.vwdiesel.net/phpBB/viewtopic.php?t=11164&postdays=0&postorder=asc&highlight=oil&start=15
  
  Can't remember if the 1Z has a cover plate on the block....but knowing VW it just might ??
• #6 by MikkiJayne on 28 Dec, 2007 17:33
• 1Z and AHU both have a plastic pipe going from that location up to the breather pod on the valve cover. From there it goes to the inlet. Its all clear and air is flowing freely - there's just too much of it for the amount of space it has to get through    The volume coming out of the breather pipe compared to taking the oil filler cap off is like breathing through a straw compared to a drainpipe.
  
  I've ordered some snake oil that claims to help with worn rings, and I'm going to order the Beetle breather tomorrow. I'll post up what happens  :roll:
• #7 by burn_your_money on 03 Jan, 2008 07:31
• Any luck?
• #8 by clbanman on 03 Jan, 2008 09:11
• Quote from: "libbybapa"

  You could try pouring sand in the intake with the engine running to help the rings re-seat...   :lol:  :lol:
  
  Andrew

  
  
  I thought that only worked for porting your intake?   :wink:
  http://www.audiforums.com/m_693578/tm.htm
• #9 by MikkiJayne on 03 Jan, 2008 09:57
• LOL! I must have missed that when it made it on VW Vortex. Thats almost as good as direct exhaust injection!  :lol:
  
  
  
  Anyway, no progress yet as the car hasn't moved in a week cos he's eaten his first CV joint already  :roll:  The snakeoil turned up today though so I'll put that in tomorrow and I have some long journeys next week to see what happens....
• #10 by jtanguay on 03 Jan, 2008 13:00
• maybe not sand, but something very very fine grit.  i seem to recall reading borax being sucked through the intake of some diesel engine to help seat the rings???  then obviously flushing the oil afterwards  :lol:
• #11 by jimfoo on 03 Jan, 2008 16:30
• Just get a hole in the hose from your air filter and drive around on dusty roads for a while. It will seat your rings so well you will need to replace them and bore out the block. :evil:
• #12 by burn_your_money on 03 Jan, 2008 19:53
• 2 tablespoons of dust will wear out rings enough to require a rebuild.