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#4508172 - 09/05/17 02:56 PM Flaking aluminum oil pan
Boosted240 Offline


Registered: 07/06/09
Posts: 20
Loc: Canada
About a week ago I drained my oil and pulled the lower oil pan, saw that the residual oil in the pan seemed to have a fine glitter to it in the sunlight. I cut open the filter and found about a dozen <1mm diameter flakes in the pleats that were non magnetic. I luckily sampled the oil drain so I sent it off to Blackstone last week. The report came back with nothing too concerning. Been scratching my head for days. Today i was cleaning up the gasket surface of the upper aluminum oil pan to reinstall the lower portion I removed last week. After removing some varnish with a towel soaked in brake clean I came across what I believe to be the source of the flakes. It appears to be a rough casting defects from the factory, I also was wonder if high detergent synthetic oil also accelerated the flaking? I scratched a little off with a pick and it produced identical flakes to the ones I found in the filter. What kind of aluminum casting anomaly is this?




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#4508188 - 09/05/17 03:28 PM Re: Flaking aluminum oil pan [Re: Boosted240]
DuckRyder Offline


Registered: 10/20/05
Posts: 4214
Loc: Atlanta
If Iím looking at the right area it almost looks like the tool which tightened the upper pan got into the casting...
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#4508224 - 09/05/17 04:19 PM Re: Flaking aluminum oil pan [Re: Boosted240]
Boosted240 Offline


Registered: 07/06/09
Posts: 20
Loc: Canada
Hmm quite possible. The area left behind from the flaked aluminum is rough, like it was sand casted.


Edited by Boosted240 (09/05/17 04:30 PM)

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#4508300 - 09/05/17 06:01 PM Re: Flaking aluminum oil pan [Re: Boosted240]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
What engine/vehicle?
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#4508311 - 09/05/17 06:16 PM Re: Flaking aluminum oil pan [Re: Boosted240]
PimTac Online   content


Registered: 03/04/17
Posts: 4316
Loc: Soviet State of Washington
From that affected area, go down just past that ridge. Looks like pits where something hit the pan. Same tool?
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#4508634 - 09/06/17 01:02 AM Re: Flaking aluminum oil pan [Re: Linctex]
Boosted240 Offline


Registered: 07/06/09
Posts: 20
Loc: Canada
Originally Posted By: Linctex
What engine/vehicle?


Nissan SR20DET

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#4508642 - 09/06/17 01:27 AM Re: Flaking aluminum oil pan [Re: Boosted240]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
The flakes might not even be metal; they might be vinyl or some other non-metallic coating.

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#4508655 - 09/06/17 02:10 AM Re: Flaking aluminum oil pan [Re: Merkava_4]
PimTac Online   content


Registered: 03/04/17
Posts: 4316
Loc: Soviet State of Washington
What Merk just said prompts me to wonder if any additives were used in this Nissan? Cerakote etc?
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#4508760 - 09/06/17 07:37 AM Re: Flaking aluminum oil pan [Re: Boosted240]
DuckRyder Offline


Registered: 10/20/05
Posts: 4214
Loc: Atlanta
It is probably going to be tough to get it clean enough, but if it is in fact a casting porosity you might be able to seal it with Glyptal. If you can find 1201B it is thicker. Iíve never tried to use it on Aluminum or on a non hot tanked used part though.
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