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12-21-2017, 10:24 AM | #1 |
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Bimmer Performance Center S63 tear down for bent rod (Pic Heavy)
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.
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. The culprit... still amazing this didn't set a check engine light or any malfunction warning messages. |
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12-21-2017, 10:31 AM | #2 |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Nice breakdown... very common culprit. Too bad folks can prevent a lot of this by reading the plugs well beforehand. See the piston crown... so telling!
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12-21-2017, 11:03 AM | #3 |
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12-28-2017, 04:33 PM | #4 |
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Correct this one did have a tune on it.
This S63 is going to be getting the BPC treatment. We will be building this motor. I will begin a new thread in a separate part of the forum. Ill tag this thread and the other together so they can be followed. |
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12-29-2017, 10:14 AM | #5 |
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How can you safeguard against bent rods? Other than by not tuning your car cause that ship has sailed for me
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2014 BMW M5 Comp Singapore Grey Metallic
Modifications: Gintani tune (91 and VP110 (724 rwhp)), MSR intakes, Akrapovic EVO exhaust, HRE S101, Evolve Catless Downpipes, Michelin PS4S, Vorsteiner Rear Diffuser, RW Carbon front lip and rear spoiler, M Perf Alcantara Steering Wheel, IND paint matched front and rear reflectors, Rayno nano carbon ceramic tint (40%), Hardwired Escort 9500ix |
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12-30-2017, 07:28 AM | #6 |
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Great pics; thanks for sharing.
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CURRENT: 22' INDIVIDUAL M5| CHALK | TARTUFO | CCB | MPE | H&R | IND
GONE: 19' M5C| SINGAPORE GREY| ARAGON|VELOS VLS-06|H&R|iPE|IND|XPEL|CF|RADENSO GONE: 15' F10 M5|BSM|BLACK|VELOS VSS-S2|KW|AKRA|IND|CF |ESCORT 360|VELOS PIGGY GONE: 13' F10 M5|SG|BLACK|AKRA|KW|IND LONG GONE: 09' E60 M5|02' E39 M5 |
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01-01-2018, 04:04 PM | #7 | |
F10 1/4 WR: 9.9s / 142.5mph 1/2 WR: 175.5mph
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Quote:
2. Good gas... often rod will bend during a catastrophic event (pre-ignition) Typically these rods are not bending because of the power levels, its more in the tuning and power profile |
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01-02-2018, 09:44 AM | #8 |
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Thanks for the info.
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2014 BMW M5 Comp Singapore Grey Metallic
Modifications: Gintani tune (91 and VP110 (724 rwhp)), MSR intakes, Akrapovic EVO exhaust, HRE S101, Evolve Catless Downpipes, Michelin PS4S, Vorsteiner Rear Diffuser, RW Carbon front lip and rear spoiler, M Perf Alcantara Steering Wheel, IND paint matched front and rear reflectors, Rayno nano carbon ceramic tint (40%), Hardwired Escort 9500ix |
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01-24-2018, 09:31 AM | #11 |
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Thanks!
Yes, there are quite a few harnesses and hoses on the engines. Last edited by Phil@BPC; 01-25-2018 at 10:07 AM.. |
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01-24-2018, 05:59 PM | #13 |
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Great thread
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CURRENT: 22' INDIVIDUAL M5| CHALK | TARTUFO | CCB | MPE | H&R | IND
GONE: 19' M5C| SINGAPORE GREY| ARAGON|VELOS VLS-06|H&R|iPE|IND|XPEL|CF|RADENSO GONE: 15' F10 M5|BSM|BLACK|VELOS VSS-S2|KW|AKRA|IND|CF |ESCORT 360|VELOS PIGGY GONE: 13' F10 M5|SG|BLACK|AKRA|KW|IND LONG GONE: 09' E60 M5|02' E39 M5 |
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