[propogandapand4]

Hello, recently i bought bmw 330d with a 180kw n57 motor. The seller told that lot of parts were changed and motor works fine now. I drove it for about 300km, everything works smoothly, no sounds and etc. and decided to check filters oil and do basic maintenance. So i took off oil filter and i found lots of small dust like metal parts in filter and its housing. I contacted seller and he called his mechanic and said that its imposible to wash everything completely and there may be some metal from the chain failure accident in filter. So shuold i put another oil filter drive for a while and check it again or its deal done in this situation?
Is it possible that all that metal is from previous brakedown or its more likely that its newly made up and something is wrong with motor

[W37V]

Is the metal magnetic?

You can do following:
- Put magnetic plug
- Change the oil every 2000 miles for 3 times (You can extend the interval based on your comfort level).
- CRITICAL: Change your oil filter more frequently: Maybe every 500 or 1000 miles. You can just change filter without changing the oil.
- With above done for about 5000 miles, is there still significant metal in filter?

You could do an extreme steps do do following:
- Drop the oil pan and clean it
- While oil pan is out - clean oil pump intake
- remove and clean oil filter housing
- flush all oil lines (incluig turbo, etc).

[apexit4]

I'd be weary of the quality of the work the previous shop performed. You'd think that after they fixed the issue, they would do multiple engine flushes to clear out as much of the metal flakes as possible. From what I understand, doing simple oil changes and/or engine flushes will not eliminate all the metal.

How long after the engine was fixed was the car sold? If directly after, I'd be a little suspicious. Either way, multiple engine flushes would be the first thing to do I'd assume.

[propogandapand4]

It was sold about a month after rebuild, seller was telling thay he drove it for about a month.

[Dr.Rockso]

At this point you're stuck with it. I'd throw fresh oil and a filter in it and drive it a bit, maybe after 3-5k ( if it makes it that long ) pull the filter and see what you find. Try to clean the metal out of the filter housing so you don't skew your results.

[Spyro235]

Absolutely get every bit of of metal out that you can. I'd honestly run cheap walmart synthetic oil, and change the oil and filter again at 1000 miles MAX. I might even do 500 miles. I'd do 500-1000 mile changes until the filters aren't coming out filled with metal, personally.

[apexit4]

Originally Posted by Spyro235

Absolutely get every bit of of metal out that you can. I'd honestly run cheap walmart synthetic oil, and change the oil and filter again at 1000 miles MAX. I might even do 500 miles. I'd do 500-1000 mile changes until the filters aren't coming out filled with metal, personally.

Good point on running cheap synthetic oil with a small oil change interval.

I'd probably start out at changing the oil at 100 or 200 miles initially though. If it looks clean, then move up to maybe 500 miles before inspecting again. If dirty with metal, change the oil and run another 500 miles and keep inspecting until its clean while moving up the oil change interval by 500 miles every time. It's a bit tedious but probably the best way of getting the metal out short of disassembling the engine or doing something like an ultrasonic cleaning.

[Spyro235]

Originally Posted by apexit4

Good point on running cheap synthetic oil with a small oil change interval.

I'd probably start out at changing the oil at 100 or 200 miles initially though. If it looks clean, then move up to maybe 500 miles before inspecting again. If dirty with metal, change the oil and run another 500 miles and keep inspecting until its clean while moving up the oil change interval by 500 miles every time. It's a bit tedious but probably the best way of getting the metal out short of disassembling the engine or doing something like an ultrasonic cleaning.

Tbh, theres a solid chance I'd run a few jugs of oil into the motor all in the same day- doing a 10-50 mile change real quick just to see. Metal in the motor scares me!

[BB_cuda]

My two cents. If you already drove it a few hundred km, the metallic dust has already done whatever it will do to the journal bearings whether in engine or turbos. Sure, go ahead and try to clean with some quick interval oil changes but it won’t change too much what has already been done. New engines from factory used to have break in oil. When that first change was done, you would see a metallic luster in that first batch of oil. Engines these days aren’t said to be broke in but if you look at first batch of oil, you see pretty close to same thing.

[propogandapand4]

update, the motor still runs. i checked filter after 1000km from opening old one, there are no more metalic dust, BUT i still find small metal like peaces that are colour of copper. iam afraid it can be from those parts that are used between crankshaft and rods.

[Spyro235]

Originally Posted by propogandapand4

update, the motor still runs. i checked filter after 1000km from opening old one, there are no more metalic dust, BUT i still find small metal like peaces that are colour of copper. iam afraid it can be from those parts that are used between crankshaft and rods.

I believe you're referring to the rod bearings?
Pieces in teh filter are a good thing, that means the junk is getting flushed out, and caught in the filter. that's what it's there for! I'd put another low stress 1 or 2k km on it, do another oil change.. and then if it's still running at that point, I'd begin the gradual process of *shrugs* "it still runs, and shows no signs of stopping"

Glad to hear it's working out!

[propogandapand4]

yea iam talking about rod bearings, the problem is that if rod bearings are failing, getting brushed to their 2nd or 3rd layer that is colour of copper it might damage crankshaft.

[Yozh]

Where in Europe.