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Thread: Tdi - engine oil escaping from filler due to pressure

  1. 19th August 2007, 07:08 AM #1
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    Tdi - engine oil escaping from filler due to pressure

    98 Discovery tdi - 190,000kms on the clock.

    From an inspection under the vehicle it appears there is a significant oil leak as everything is covered in a nice coat of anti-rust. Traced the oil all the way to the top of the block where it appears to be coming out the oil filler cap.

    I imagine this is due to a build up of pressure somewhere but where and how to solve i'm not so sure. Any ideas?
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  2. 19th August 2007, 07:22 AM #2
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    blocked crank case breather is your first bet... find it and clean it up.
    Dave

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  3. 19th August 2007, 12:33 PM #3
    mcrover Guest
    Yep I agree with Blknight, Blocked PCV valve.
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  4. 19th August 2007, 12:56 PM #4
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    pull the black canister thing off the side of the valve cover and clean it out with some brake clean or something like that and check all the hoses are clear. mine had this problem and actualy blew the gasket out on the timeing cover.
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  5. 19th August 2007, 01:13 PM #5
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    Yep, the Black canister on the Drivers side of the Rocker cover will be the 1st place i would look. Make sure the hoses going from it to the Sump and intake are clear as well.

    Get onto it quickly as that is the 1st track for a Deisel running on its own oil.... then its bye bye engine.....

    Steve
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  6. 20th August 2007, 12:03 PM #6
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    Cool, thanks guys. Will check it out next time i have a chance.
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  7. 1st September 2007, 01:02 PM #7
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    Cleaned out the PCV valve last weekend and checked the hoses. Was not blocked and the hoses are clear. Oil is still escaping out the filler cap.

    What's the next thing to check?
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  8. 1st September 2007, 01:15 PM #8
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    compression! got any photos or video of it? mine was bad enough to leak past the rear main and timeing cover gasket with the filler cap on
    Last edited by 460cixy; 1st September 2007 at 01:18 PM.
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  9. 1st September 2007, 05:06 PM #9
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    Quote Originally Posted by 460cixy View Post
    compression! got any photos or video of it? mine was bad enough to leak past the rear main and timeing cover gasket with the filler cap on
    What do you mean by compression? As for photos, I could, but imagine oil pooling around the top of the plastic cover near the filler hole and thats what it looks like.
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  10. 1st September 2007, 05:27 PM #10
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    ahh i was thinking more of a mist like excesive blowby than actual oil. maybe as simple as the cap leaking but even with the cap off it shouldent realy spit oil out well not alot anyway.
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