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Old 11-26-2018, 02:49 PM
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Metal on magnetic oil drain plug

Hello guys I just changed my oil after putting about 600 miles on my new engine build that was done during the summer and this is what I found on my drain plug. Is this normal for a new built engine? This is a 377 dart shp small block chevy and its a full roller setup with a hydraulic roller cam. Engine sounds and runs good and has excellent oil pressure.

Everything was as clean as heck before putting together. Should I be worried?
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Old 11-26-2018, 03:00 PM
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What did you use for assembly paste?

Wait to get some answers from the collective, but you can certainly take a sheet of clean white paper and scrape the schmutz onto it, spreading it out with something thin like a putty knife or razor blade.

You can also send a sample of your oil to Tribology labs like Blackstone. Its not very expensive.
If you used a molybdenum heavy assembly lube, I'd bet this is okay. However, Thats coming more from rear axles and transmissions, where that amount of schmutz is acceptable in a HD application.
Hopefully, The Usual Suspects chime in.
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Old 11-26-2018, 03:15 PM
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Pretty normal for a new engine that wasn't put together in an absolutely surgical clean shop, where everything is ultrasonic cleaned.

if you use one of those on the oil filter magnets, it will all get trapped in the filter against the side of the casing for you to see when the filter is cut open.
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Old 11-26-2018, 03:18 PM
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The red sticky type assembly lube was used for the cam and lifters since it was a hydraulic roller setup. When I wiped it off with a paper towel it was really grainy like a very dark gray and felt like dirt type feeling if that makes sense. When I took the oil filter off I could not really see any metallic type of a look to the oil when it drained.

I will have to cut open my oil filter and see how it looks as well. I don't like the feeling of the way it looks and feel like I have something bad going on even though it runs great and has excellent pressure.
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Old 11-26-2018, 03:35 PM
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I did not have a magnet on the side of my oil filter but I am going to cut it open here shortly and get the tale of the tape and hopefully it will be ok.
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Old 11-26-2018, 04:08 PM
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Looks like Moly paste from the assy lube. I'd run it and keep an eye an eye on it.
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Old 11-26-2018, 06:31 PM
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Well guys the news is good. Cut open the filter and it was as clean as could be and even ran a magnet over the paper of the filter and there was hardly anything that you could even really see and no metallic in the oil from looking in the light and it was very clean indeed. From what was stated above it was most likely assembly lube from the arp stuff used on many of my bolts and did not think about that but this is my first time changing the oil on a fresh rebuild and having a magnetic drain plug in my oil pan. A good learning experience for me. Thanks guys for your comments and always appreciated. I will keep a good eye on it.
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