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Bimmer Performance Center S63 tear down for bent rod (Pic Heavy)

Discussion in 'S63' started by [email protected], Aug 8, 2018.

  1. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
    Hey guys here are some photos I took during a tear down of an F10 that came in. Customer brought this M5 in because of a really bad sound coming from the engine. Surprisingly a check engine light never came on or a warning message. Once we brought it into our center we could hear the noise right away. Once we looked over the car and made sure everything externally was ok we performed a compression test. During this test we found cylinder 5 to be the culprit. We pulled the drivers side cylinder head and removed piston/ rod combination from cylinder 5. Hope this sheds light on something that's rarely seen.
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  2. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
    Only very minor scoring on the cylinder walls. Most impressive is that the cylinder bore has a bend about half way facing the passenger side.
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    The culprit... still amazing this didn't set a check engine light or any malfunction warning messages.
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  3. NoQuarter

    NoQuarter Lieutenant

    Messages:
    748
    Location:
    Indiana
    Ride:
    Z4 35is, 535xi, X5 35i
    Great Pics! Looks like a fun project!
     
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  4. doublespaces

    doublespaces Administrator

    Messages:
    6,253
    Location:
    AZ
    Ride:
    2009 E93 335i
    Holy cow, nice bend... And these photos are awesome. With the customer this far in, did they do any upgrades or just factory replacement?
     
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  5. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
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  6. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
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  7. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
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    Performing leak down before reinstallation in vehicle.
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  8. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
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  9. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
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  10. Jeffman

    Jeffman Lieutenant

    Messages:
    713
    Holy complicated as hell engine, Batman!
    Somebody remind me never to buy a S63.

    Seriously tho, how many miles on the engine and what was the culprit? I’m sure the DME logged some errors.
     
  11. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
    I cant recall the exact mileage but it was between 30-40,000.

    Most S63's bend rods due to inadequate tuning. Majority of tuners just tune for max power. The S63 makes so much torque and horsepower it will literally bend rods. If the tuner is good you can have the horsepower and torque come in smoothly and not aggressive and keep the torque around 600ftlbs to make it last. But... on the flip side we have seen stock S63's without tunes bend rods as well. This one bent a rod due to being driven through a rather large water puddle.
     
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  12. Jeffman

    Jeffman Lieutenant

    Messages:
    713
    Wow. That’s crazy to bend a rod by driving through a water puddle. If the car wasn’t tuned, i.e., stock, then I’d call this a product defect which repair should be covered by BMW.
     
  13. doublespaces

    doublespaces Administrator

    Messages:
    6,253
    Location:
    AZ
    Ride:
    2009 E93 335i
    I give your sarcasm a 3/10
     
  14. Jeffman

    Jeffman Lieutenant

    Messages:
    713
    I’m not trying to be sarcastic. Is this a stock untuned engine? If so, BMW should cover the repair of their defective product.
    Edit: I didn’t appreciate “going through a puddle” meant “bad driving lead to water getting into the intake.” BMW is not responsible.
     
    Last edited: Aug 10, 2018
  15. LessIsMore

    LessIsMore Specialist

    Messages:
    50
    Ride:
    09 535i
    So the owner actually drove through water high enough to get sucked i to engine? through intake filters?

    Cant blame BMW design for that.
     
  16. phil@BPC

    [email protected] Private Vendor

    Messages:
    37
    Ride:
    2003 M5
    This was an untuned stock S63. We have seen a few water seized BMW engines (N52, N54 and N55 being the most common). In NC we don't see much flooding around us. What we see is that when you go through a standing water no matter the depth water gets splashed up and gets pulled into the intake. Especially if you are going 35+mph there just enough suction from the engine to pull in the water. What makes this worse is when there is a car next to you that splashes water up as well, that's just more water getting pulled into the engine. We feel bad for owners because they had no idea what happened.
     
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