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Targa, Panamera Turbo
Join Date: Aug 2004
Location: Houston TX
Posts: 22,366
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You Ever Wonder Why You Get Copper in Your Oil Analysis Sample?
A recent development has been occurring throughout the diesel world. Folks engaging in oil analysis of their engine oil for newer engines have been seeing sporadic increases in copper in their used engine oil analysis. Most new diesel engines have oil coolers - inside those coolers is a network of small honeycombs plated with copper.
The zinc dithiophosphate used in many engine oils as an anti-wear component that will leach the copper. It won't hurt you per se but it does monkey up the oil analysis results making you think that you could be getting wear from valve train bushings, wrist pin bushings, cam bushings, thrust washers, governors, connecting rods bearings, valve gear train thrust buttons. Here is a pic I just took - about 40X magnified. You can see the copper. Sounds simple enough but the OEM (Izuzu for GMC) had no clue this was going on. Even more surprising was the lead I have been seeing leach out of Cummins engines. Thats a whole other story. 
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Michael D. Holloway https://simple.m.wikipedia.org/wiki/Michael_D._Holloway https://5thorderindustry.com/ https://www.amazon.com/s?k=michael+d+holloway&crid=3AWD8RUVY3E2F&sprefix= michael+d+holloway%2Caps%2C136&ref=nb_sb_noss_1 |
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07-31-2009, 05:47 AM
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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,133
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interesting stuff Lubey!
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Steve '08 Boxster RS60 Spyder #0099/1960 - never named a car before, but this is Charlotte. '88 targa  SOLD 2004 - gone but not forgotten
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07-31-2009, 05:51 AM
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Somewhere in the Midwest
Join Date: Oct 2001
Location: In the barn!
Posts: 12,499
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"Plating" is an important word in the analysis, yes? The oil circuit on a 911 has no plated part (none that come to mind right now) that comes in contact with the oil. The key is understanding the system and what it's made off before making a final analysis. I'm not sure a lot of wrenchers think deep enough....
Last edited by MotoSook; 07-31-2009 at 06:06 AM.. |
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07-31-2009, 06:04 AM
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Registered
Join Date: Feb 2002
Location: Montana
Posts: 715
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So, care to elaborate about the lead in the Cummins engines? Is it something I'd need to worry about?
Thanks
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1982 930, K-27, BL adj. WUR, Rarlyl8 Headers and Hooligan muffler, PK CDI, 22 and 30mm torsion bars, poly bronze bushings 30mm raised spindles and custom valved Bilstein shocks (by Elephant Racing), monoballs front and rear (by Rennline), Alton 17" Fuchs, Fred Cook fuse panel |
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07-31-2009, 06:05 AM
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Wood Magician
Join Date: Jun 2002
Location: Costa Mesa CA.
Posts: 891
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The early 911 oil tanks are copper plated inside and out, 67-70 are for sure
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07-31-2009, 08:16 AM
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Targa, Panamera Turbo
Join Date: Aug 2004
Location: Houston TX
Posts: 22,366
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Quote:
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Michael D. Holloway https://simple.m.wikipedia.org/wiki/Michael_D._Holloway https://5thorderindustry.com/ https://www.amazon.com/s?k=michael+d+holloway&crid=3AWD8RUVY3E2F&sprefix= michael+d+holloway%2Caps%2C136&ref=nb_sb_noss_1 |
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07-31-2009, 10:20 AM
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