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  1. #1
    Active Member Two Rings
    Join Date
    Feb 04 2013
    AZ Member #
    108888
    My Garage
    aw11, 3x Starions, e70 X5, LMM dually
    Location
    Asheville

    Mystery oil leak 1.8t - resolved with explaination

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    So I recently fixed a few issues with my 1.8t. Things were good until I drove it to work ~ 50 miles away. When I pulled into the lot, tons of smoke was coming from underhood. I thought it might be the cam chain gasket or the half moon on the valve cover gasket. Both looked good. I threw an oil absorbant pad in there for the drive home. Took it all apart when I got home and resealed everything. Degreased the engine compartment because it had gotten everywhere. Took it for a spirited drive today to shake it down and had the same problem. WTF.

    So when I got the car home I left it running and wiped everything down and started looking for leaks. The valve cover gasket was dry and holding, the cam chain tensioner gasket was dry and holding. Then I noticed that one of the three chrome set-balls in the aft-most part of the cam chain tensioner was weeping oil at idle. I wiped it down and watched it some more. The damn thing was leaking. I revved the engine a bunch and then hooked up VCDS and actuated the N205 a bunch of times (until it timed out). Now there was a mist of oil all over everything again around the back of the CCT.

    I searched around on the internet but didn't see any related posts.

    Just wanted to share my experience.

  2. #2
    Senior Member Two Rings Lockon_B7's Avatar
    Join Date
    Oct 17 2014
    AZ Member #
    289198
    Location
    New Jersey

    Great find!
    2016 A4 auto P+ Daily driver
    2016 S3 Sepang Blue Sold
    2009 A4 2.0T, 6MT, P+, Sport Package, Meteor Grey. Sold
    2008 A4 2.0T 6MT RIP

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