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Flaking aluminum oil pan #4508172
09/05/17 01:56 PM
09/05/17 01:56 PM
Joined: Jul 2009
Posts: 24
Canada
Boosted240 Offline OP
Boosted240  Offline OP
Joined: Jul 2009
Posts: 24
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?




Re: Flaking aluminum oil pan [Re: Boosted240] #4508188
09/05/17 02:28 PM
09/05/17 02:28 PM
Joined: Oct 2005
Posts: 4,631
Atlanta
DuckRyder Offline
DuckRyder  Offline
Joined: Oct 2005
Posts: 4,631
Atlanta
If I’m looking at the right area it almost looks like the tool which tightened the upper pan got into the casting...


Robert
  • 2007 Toyota Prius Touring
  • 2005 Honda Civic Sedan
  • 1972 Ford F100
Re: Flaking aluminum oil pan [Re: Boosted240] #4508224
09/05/17 03:19 PM
09/05/17 03:19 PM
Joined: Jul 2009
Posts: 24
Canada
Boosted240 Offline OP
Boosted240  Offline OP
Joined: Jul 2009
Posts: 24
Canada
Hmm quite possible. The area left behind from the flaked aluminum is rough, like it was sand casted.

Last edited by Boosted240; 09/05/17 03:30 PM.
Re: Flaking aluminum oil pan [Re: Boosted240] #4508300
09/05/17 05:01 PM
09/05/17 05:01 PM
Joined: Dec 2016
Posts: 7,171
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,171
Waco, TX
What engine/vehicle?


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Flaking aluminum oil pan [Re: Boosted240] #4508311
09/05/17 05:16 PM
09/05/17 05:16 PM
Joined: Mar 2017
Posts: 6,525
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,525
...
From that affected area, go down just past that ridge. Looks like pits where something hit the pan. Same tool?


Cannot see signatures any longer so it doesn’t matter.
Re: Flaking aluminum oil pan [Re: Linctex] #4508634
09/06/17 12:02 AM
09/06/17 12:02 AM
Joined: Jul 2009
Posts: 24
Canada
Boosted240 Offline OP
Boosted240  Offline OP
Joined: Jul 2009
Posts: 24
Canada
Originally Posted By: Linctex
What engine/vehicle?


Nissan SR20DET

Re: Flaking aluminum oil pan [Re: Boosted240] #4508642
09/06/17 12:27 AM
09/06/17 12:27 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
The flakes might not even be metal; they might be vinyl or some other non-metallic coating.

Re: Flaking aluminum oil pan [Re: Merkava_4] #4508655
09/06/17 01:10 AM
09/06/17 01:10 AM
Joined: Mar 2017
Posts: 6,525
...
PimTac Offline
PimTac  Offline
Joined: Mar 2017
Posts: 6,525
...
What Merk just said prompts me to wonder if any additives were used in this Nissan? Cerakote etc?


Cannot see signatures any longer so it doesn’t matter.
Re: Flaking aluminum oil pan [Re: Boosted240] #4508760
09/06/17 06:37 AM
09/06/17 06:37 AM
Joined: Oct 2005
Posts: 4,631
Atlanta
DuckRyder Offline
DuckRyder  Offline
Joined: Oct 2005
Posts: 4,631
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. I’ve never tried to use it on Aluminum or on a non hot tanked used part though.


Robert
  • 2007 Toyota Prius Touring
  • 2005 Honda Civic Sedan
  • 1972 Ford F100

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