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Craig 930 RS's Avatar
 
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Question Silver GOO in the drain plug..........pls. help with the mystery...

The Turbo has about 30 hours on the engine since a Gamroth rebuild in 2004. Several oil changes since the rebuild, then I took ownership.

Found a very, very fine silvery goo in the circumferential groove of the tank drain plug at the last oil change , probably about 1 1/2 teaspoons worth. Almost looks like a prep paste in color and consistency.

Any educated guesses as to what this is, based upon the rebuld timeframe - and what this trypically could be?

THX

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Old 10-14-2005, 07:07 PM
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I had the same stuff in my oil drain plug. It is my first Porsche and my first oil change on it. I think it is (and hope it is) a moly additive in the oil. I've seen some of this stuff for sale. I'll have a better idea after the 2nd oil change.
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Old 10-14-2005, 07:23 PM
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Old 10-14-2005, 07:25 PM
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Might be antiseize compound.
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Old 10-14-2005, 08:34 PM
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The drain plug in magnetic, these are wear particles from the engine wear the reason it looks like anti-seize is that anti-seize is usually made up of fine metal particles like silver and nickle graphite, copper etc. in a mineral oil, When i was in the the navy there were certain jobs where we actually would have to mix our own it would be graphite, red lead, and mineral oil. blended into a heavy paste. The fact that the particles are on the drain plug means that it is doing it's job by removing them from the oil stream.
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Old 10-14-2005, 09:57 PM
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Couldn't it be some fine particles from the engine break-in? 30 hours doesn't sound like much it could be just wear on a new rebuild.
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Old 10-14-2005, 11:14 PM
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Isn't it odd that after perhaps 4 or 5 oil changes that the goo is still present?
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Old 10-15-2005, 08:43 AM
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Just changing oil will not remove the goo; you need to clean the plug each time. A very fine sediment on the magnetic plug is normal.
I changed the plug in the oil tank to a magnetic one; now I have two: One in the sump and one in the tank.
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Old 10-15-2005, 09:21 AM
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Exactly. I've performed 1 oil change since buying the car - and saw the goo in the plug.

Was the goo ever removed - that is the question
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Old 10-15-2005, 10:03 AM
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Quote:
Originally posted by Paulporsche
Might be antiseize compound.
Thats my thought too.
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Old 10-15-2005, 10:59 AM
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Craig:

I'm not sure I'd be overly concerned about that. Very few people actually
take the time to wipe the drain plugs completely clean and degrease with brake cleaner.

Personally, I've make it a practice to do just that for 30+ years so I can spot any changes. From your description though, I don't see a problem.

You might ask Randy if he removed and scrubbed out (or ultrasonically cleaned) the oil tank when the new engine was reinstalled. Very few individuals (or shops) do that unless the old engine suffered a mechanical failure.

As SOP, one should remove ALL of the oiling system components, disassemble and clean everything out. All coolers and tanks should be ultrasonically cleaned, oil lines scrubbed out VERY thoroughly, and thermostats disassembled and cleaned out.
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Old 10-15-2005, 11:28 AM
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To satisfy our curiousity - if for no other reason - let's do this:
- post a closeup pic if you have one of the drain plug
- see if it is magnetic
- pull some off w/ a white paper towel and see if it is gritty or smears right out
- dilute it with brake cleaner and see if there are tiny shards in there (use a magnifying glass)
- get a periodic oil analysis done if you don't mind adding about $15 to each oil change
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Old 10-15-2005, 12:03 PM
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Like a numbnut, I didn't take a pic. I do recall the scenario quite clearly:

1) Smeared right out
2) Very very fine, almost like a moly paste
3) No shards

My take on this is that it is not a problem; just haven't seen this with other oil changes on 2 previous 911 engines I've had.
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Old 10-15-2005, 02:13 PM
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It is just metal particles from your engine that are sticking top the magnetic drain plug. I have seen this on every car that I have ever changed oil in that had a magnetic drain plug. You have nothing to worry about unless it starts to become flakes or bits small enough that you can feel. The paste is normal.

It would not be "anti-seize" as that is made from powdered aluminum and therefore not magnetic.
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Old 10-15-2005, 02:34 PM
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Given that info - it probably is not metal particles from your engine. If it was, there would surely be some shards and it wouldn't smear out perfectly. Note he doesn't say it is magnetic. Maybe it is anti-sieze.

I agree re the ubiqitous nature of shards on teh plug at every oil change -- maybe we should why you DON'T have them...

Clean the plug real well next time - then inspect.

I would not worry, but would do periodic oil analyses depending on my level of paranoia and/or curiosity.

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Old 10-15-2005, 03:21 PM
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