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Leak or Soot Formation on underside of engine ...?

discoganya
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discoganya Member

discoganya

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I'm seeing a black residue on the under surface of my engine cover at the highlighted yellow oval (see picture). I'm not sure if it is oil mixed with dust or soot from the exhausts. I don't have a single drop on the driveway. Anyone have any thoughts on this? Thanks

Orient Express: I borrowed your image from the DIY Section, simply because it's so easy to show something on it. I hope you don't mind.

post-2-1154623231_thumb.jpg

post-11357-1154624470.jpg

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  • 5 months later...
johnj.moran Member

johnj.moran

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I'm seeing a black residue on the under surface of my engine cover at the highlighted yellow oval (see picture). I'm not sure if it is oil mixed with dust or soot from the exhausts. I don't have a single drop on the driveway. Anyone have any thoughts on this? Thanks

Orient Express: I borrowed your image from the DIY Section, simply because it's so easy to show something on it. I hope you don't mind.

I have the same exact residue that you described in the same location. I have a MY99 C4 Cab. I showed it to the local Porsche mechanic and he said that a flat six will often times weep a small amount of oil and since there's nothing hitting the ground it's fine.

Did you ever get a resolution on this? Please let me know if so. Thanks.

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johnj.moran Member

johnj.moran

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I just noticed the same thing on my MY 99 C2. Does anyone have any further information on this? Is this normal or something to be concerned about?

Pete

I believe the dry sooty substance is on the Vario Cam F1 equipment, passenger side, am I right? I showed it to a mechanic at Stevens Creek Porsche and he said it's normal, especially since my engine hasn't been cleaned since new, 7.5 years. Perhaps the driver's side Vario Cam isn't covered because the anti-freeze tank above is usually replaced due to cracks, etc, and everything on that side gets wiped down on repair.

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