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      06-29-2020, 08:53 PM   #62
F32Fleet
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Drives: 2015 435i
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Quote:
Originally Posted by eksigned View Post
Quote:
Originally Posted by F32Fleet View Post
What sort of engine air filter? I'd look there first.

What oil were you running?
engine air filter? for a case like this? may i ask what the significance is here with the aftermarket air filter? i also have dinan's cai too by the way. i ask because when replacing the filter, i noticed a good amount of dirt and dust within the elbow behind the dinan filter. i took this as being normal (burns off) and went about my day. are you suggesting that a bad air filter could have led to this scoring and failure?
Yes. A poorly designed or ill-fitting air filter could case scoring of the cylinder walls.
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