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EGR water, why is this happening

This is a discussion on EGR water, why is this happening within the General Help forums, part of the LSx Technical Help Section category; I did the whole cleaning the intake with seafoam and noticed a little improvement in the way the car ran. ...

  1. #1
    Member Lethal Z's Avatar
    Join Date
    Aug 2008
    St. Louis

    98 Z28

    EGR water, why is this happening

    I did the whole cleaning the intake with seafoam and noticed a little improvement in the way the car ran. So I decided to try to keep it clean by adding a catch can in between the valve covers and the pcv, just wanted to see what I might catch. This is when I noticed something very weird. Now this only happens when its cold outside. The catch can actually started taking on water as the car idled. It wasn't pouring in, but after about 5-6 minutes it would just condensate and eventually there would be maybe 4-5 tablespoons of water and a little oil. Not much but just enough to turn the mixture milky. When I first saw this I started to panic, however there where no signs of problems from the crank case, and the oil looked normal. I emptied the mixture, cleaned it reinstalled it and took the car for a drive. After driving the car for about 10 minutes I stopped to check it. Same thing, now there was a lot less water this time maybe a tablespoon. I cleaned it and drove the car again and the problem stopped. Now this is not a daily driver. She sits in the garage and I usually only drive it on the weekends if the roads are clear. But if it happens to be a cold day this process starts all over again.
    So my question is, can this be normal? The car never showed any signs of problems before nor does it now. It just seems weird to me that this much water would be entering the engine. Im just concerend that this could have hydrolocked the engine had I not caught it.
    Last edited by Lethal Z; 01-18-2009 at 07:10 PM.

  2. #2
    That guy thearborbarber's Avatar
    Join Date
    Nov 2007

    White over Red
    1991 Suburban

    Mine does the same thing. It's just condensation burning off in the crank case.

  3. #3
    Exalted Cyclops 67CamaroRSSS's Avatar
    Join Date
    Feb 2007
    San Diego, CA

    2002 Z28 A4 NBM
    Sadly now demodded :(

    ^^ Condensation. It's normal....

  4. #4
    Yo Da Lin The Valley..... astyles's Avatar
    Join Date
    Mar 2006

    same here too......

  5. #5
    Member 346ci's Avatar
    Join Date
    Sep 2007

    1998 Z-28

    mine too, just condensation

  6. #6
    Veteran 0rion's Avatar
    Join Date
    Aug 2005

    98 Formula
    06 duramax

    that's why you shouldn't run a car just for a few minutes and shut it back off before it gets up to temp and burns all that water off. Both of my ls1's make a ton of condensation.....they basically piss out the tail pipes until they get good and hot.

  7. #7
    Senior Member ss~zoso~ss's Avatar
    Join Date
    Dec 2004

    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    yup, just water condensing from the hot air from crankcase

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