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      09-30-2019, 09:31 AM   #1
Styvy
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Ireland
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Drives: BMW E92 330D LCI
Join Date: Nov 2013
Location: Dublin

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N57 engine rebuild

Hi Guys,

I hope someone can give me some advice. About 2 weeks ago I was changing oil in garage. I changed oil let the car run for 10 minutes and went for test drive. I heard a noise similar to crankshaft bearing being eaten...
So finally stripped out the the crankshaft to find both bearing and crankshaft appear to be good but still could not explain the noise. If it was crankshaft bearing I would be down at least 2k to replace the crankshaft.
Moving along on Saturday we removed the cylinder head and looked at housing... both cam's appear to be worn out to the point at certain points they were cooked but one thing I don't understand is sludge instead of oild. Has anyone seen anything similar.
View post on imgur.com

BtW I am fanatic of changing oil every 5k miles.

I would appreciate any ideas.

Regards,
Alex