oil sample result help

Discussion in 'Trucks [ Eighteen Wheelers ]' started by dieseldan2005, Jun 13, 2013.

  1. dieseldan2005

    dieseldan2005 Light Load Member

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    Feb 6, 2009
    North Branch, MN
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    Hey guys i just bought an 07 t600 with a c15 in it. It has 745k on it with no major overhaul. It had rod and main bearings done 4k ago. I had an oil sample ran this week and my copper and silicon came back high. Is this normal after a bearing replacement? My cat tech didn't seem too concerned about it being it was right after the bearing replacement. Just wondering if anyone else has experienced this after such work? I can't afford to dive into the engine right now as i am just getting started. Any info would be great! Thanks
     
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  3. Heavyd

    Heavyd Road Train Member

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    If something was went wrong with the bearing roll, the engine would have seized by now. The oil sample will be off after any time the engine has been opened up and internal parts replaced. Keep this handy and get another sample at your next oil changed and compare the levels again. I'll bet it will be normal.
     
  4. dieseldan2005

    dieseldan2005 Light Load Member

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    North Branch, MN
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    Thanks heavyd. That's what the cat tech said as well. Its just a little scary to see that.
     
  5. Cowpie1

    Cowpie1 Road Train Member

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    If you can, scan and attach the report so we can look at it. For a clearer perspective, we need to see the entire report and what the numbers are.

    Copper, most times by itself without a corresponding increase in lead or tin, usually is coming from the oil cooler. Silicon is dirt, pure and simple. That would mean a lousy air filter or lousy installation of one. If bearings were the problem, you could get spikes in lead and tin to go along with copper. We need all the numbers. And one report by itself may mean nothing. It is patterns you look for over several samples. Just about anything can cause a one time spike in a wear number or contaminate, and there is no real problem.

    Heavyd has it right. Shortly after and engine is opened up, all kinds of goofy things can show up on an oil sample. The next reports, combined with the one you have now, will show a better picture of things. I wouldn't let your paranoia gland grow too big just yet.
     
    Heavyd Thanks this.
  6. dieseldan2005

    dieseldan2005 Light Load Member

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    I will try and scan it tomorrow. The only other metal that was even close to the other 2 was the iron, but it wasn't even mentioned as a problem on the report.
     
  7. dieseldan2005

    dieseldan2005 Light Load Member

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    I attached a copy of the oil sample.
     

    Attached Files:

  8. Tom'o

    Tom'o Bobtail Member

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    The lab once told me silicon refers to the state of the air cleaners.
    high silicon they said means you need to replace the air cleaners
     
  9. Tom'o

    Tom'o Bobtail Member

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    Nothing seams to be over 50 ppm, if you worried swing buy a cat dealer and get them to extract another sample out of the dipstick tube after 100hrs
    As cowpie 1 said air cleaners
     
  10. Cowpie1

    Cowpie1 Road Train Member

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    Yep, Silicon is indeed high. Gut would tell me to get new and better filters installed. But I am also taking into account the fact that the engine was opened up recently. That could also be the source, and it would be a one time hit. Same for Copper, which also is a little high, but not critical. All the other numbers look just fine, so I am not inclined to go with anything other than this is a one time hit on an engine that was just worked on. Tom makes a good point.. run it for a while, and have another sample run down the road. I would also have a secondary sample run elsewhere to compare at the same time. While I do not care much for Speedco, they do fairly good on oil samples. I have compared samples run by them and had a second sample from the same time line sent to my normal lab for comparison. Pretty darn close. So I would recommend taking two samples and have Cat run one and take the other to Speedco and have them run it and compare results. Sure, a little extra money, but information is what you need to make an informed decision.
     
  11. dieseldan2005

    dieseldan2005 Light Load Member

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    I appreciate all the insight. I will keep on it and pull another sample on my next service.
     
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