B58 340i camshaft shearing? - Bimmerfest - BMW Forums



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Old 09-02-2016, 07:42 PM
speedbird_1 speedbird_1 is offline
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B58 340i camshaft shearing?

I just hit 2k miles in my new 340i. Today out of curiosity I opened the oil fill cap to have a peek inside and noticed that there was an unusual amount of wear on the visible cam lobe (as well as the valvetronic part that makes contact with the lobe, not sure what it's called). Am I being overly paranoid about the wear or is this something of concern?
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Old 09-02-2016, 07:45 PM
speedbird_1 speedbird_1 is offline
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Old 09-03-2016, 11:24 PM
Raryel Raryel is offline
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B58 340i camshaft shearing

Quote:
Originally Posted by speedbird_1 View Post
I just hit 2k miles in my new 340i. Today out of curiosity I opened the oil fill cap to have a peek inside and noticed that there was an unusual amount of wear on the visible cam lobe (as well as the valvetronic part that makes contact with the lobe, not sure what it's called). Am I being overly paranoid about the wear or is this something of concern?
I am not an expert on this, but I absolutely recommend that you bring it to the dealer's attention ASAP. If your suspicion is correct, the dealer can repair/replace parts and prevent further damage to the car. If it is not very serious, no one could blame you for having in checked out.
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Old 09-04-2016, 12:45 AM
Eluded Eluded is offline
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probably normal
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Old 09-04-2016, 03:29 AM
CALWATERBOY DUE CALWATERBOY DUE is offline
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Quote:
Originally Posted by speedbird_1 View Post
I just hit 2k miles in my new 340i. Today out of curiosity I opened the oil fill cap to have a peek inside and noticed that there was an unusual amount of wear on the visible cam lobe (as well as the valvetronic part that makes contact with the lobe, not sure what it's called). Am I being overly paranoid about the wear or is this something of concern?

The idea of "Break-in" is that wear surfaces need to be established on all metal-to-metal moving parts. What you see is a spankin' new wear surface....your dealer can confirm that.
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Old 09-06-2016, 08:18 PM
RonD68 RonD68 is offline
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Originally Posted by speedbird_1 View Post
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I just went out and looked at mine, 4 months old 2100 miles it looks the same, I don't think it's anything but normal wear at this stage
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Old 09-07-2016, 02:52 PM
John MS John MS is offline
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It looks like normal rotational wear that is probably not even measurable. The crank surfaces would show similar wear.
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Old 09-08-2016, 06:11 PM
jlbjr jlbjr is offline
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Everything will groove in. Cams, crank, rings etc. JMO
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Old 09-11-2016, 06:58 PM
93lt1 93lt1 is offline
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Darn, I'll have to check it as well. I'm fairly sure it's normal wear. I have about 16K miles.

Just for the record, this car is great. By the way, has anyone had to add more fluid to the radiator ?
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Old 09-11-2016, 09:52 PM
BMW technician BMW technician is offline
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Bow tech here,,,that's normal wear,,,,don't worry about it,,,,my blog page bmwtechnician. com
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Old 03-29-2018, 07:01 AM
cadethoerk cadethoerk is offline
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I have the same issue on my m240i, how can a roller leave that much wear on the cam lobe??? it almost looks scored??
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