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Significant oil leak, help
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Posted by bobc [Email] (#473) [Profile/Gallery] (more from bobc) on Fri, 23 Feb 2018 15:53:38 Share Post by Email
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The patient is a 2000 Aero with 180k on the clock.

It has had an oil leak under the passenger side engine for a while now. It was not alarming but it did always leave a spot in the the driveway.My primarty suspect was the oil pump cover o0ring and seal.

so here is what I did:
- replaced the o-ring and seal on the oil pump cover. the O-ring was hard, brittle and cracked.
- replaced the oil sender (it did not appear to be leaking but as long as Im in there ... )
- replaced the oil trap hoses which were spongy and swollen.
- replaced the o rings on the oil
- dropped the oil pan to check for sludge for the hell of it (clean as a whistle btw!). used proper anerobic sealant on the pan when I replaced it.
- replaced the oil pickup tube o-ring in the pan, it was in bad shape.
- replaced the oil delivery tube o-rings, they were really bad, hard and deformed


Buttoned her up, but still on jack stands I idled the car for about 20 minutes. to check for leaks.

- there seems to be minor seepage around the crank shaft seal that I had replaced. very minor but irritating. Im not too concerned about this.
- there is a slow drip-drip off of the oil drain plug. This drip-drip is what I am calling "significant". I estimate 3 drips per minute.

investigating ... the oil seems to be dripping down the side of the pan and dripping off of the drain plug.

but I cant find where the oil is originating from.

I notice that it is dripping down oil trp tube where it connects to the pan:



It looks like it is dripping from the connection to the pan, but it seems to be wet above that point, as if something is dripping onto that hose.

I notice a wet spot on the bottom of the intake manifold:


any thoughts or help on what to check next? its dripping enough that I would think it would easy to find ... but I'm stumped!

_______________________________________ '08 9⁵ 2.3T SportCombi, Polar White '01 9⁵ Aero Midnight Blue (benched) '00 9⁵ Aero Midnight Blue (rescued) '99 9⁵ Base model, Cosmic blue '00 9⁵ Aero Silver (RIP - transmission )


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