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General Information => Troubleshooting => Topic started by: MikkiJayne on December 28, 2007, 04:16:51 am

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: MikkiJayne on December 28, 2007, 04:16:51 am

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

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: burn_your_money on December 28, 2007, 08:24:00 am

That rubber hockey puck looking thing on the valve cover could be plugged. Start there, it's cheap and easy

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: MikkiJayne on December 28, 2007, 11:33:13 am

Thanks but I've tried that already  :wink:  The crank breather is also fine.

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: jimfoo on December 28, 2007, 12:07:13 pm

No quick and dirty fix for bad rings, though lowering the fuel and boost will somewhat reduce the blowby.

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: giulianot on December 28, 2007, 02:13:09 pm

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:

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: Vincent Waldon on December 28, 2007, 04:55:26 pm

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 ??

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: MikkiJayne on December 28, 2007, 05:33:30 pm

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:

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: burn_your_money on January 03, 2008, 07:31:38 am

Any luck?

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: clbanman on January 03, 2008, 09:11:05 am

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

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: MikkiJayne on January 03, 2008, 09:57:22 am

LOL! I must have missed that when it made it on VW Vortex. Thats almost as good as direct exhaust injection!  :lol:

(http://www.polov8.co.uk/images/DirectExhaustInjectionFail.jpg)

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....

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: jtanguay on January 03, 2008, 01:00:21 pm

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:

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: jimfoo on January 03, 2008, 04:30:59 pm

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:

Title: Excessive crankcase pressure - need a quick and dirty fix!
Post by: burn_your_money on January 03, 2008, 07:53:38 pm

2 tablespoons of dust will wear out rings enough to require a rebuild.