Metal bits on oil pick up - 2 Litre Twinspark CF3 - Alfa Romeo Forum
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Metal bits on oil pick up - 2 Litre Twinspark CF3

Finishing with a rebuild, as in this post

https://www.alfaowner.com/Forum/engin...-overhaul.html

and as we fitted the oil pick up and sump, have come across copper or brass shavings/shards, as per the attached photo, that were stuck between the oil pick up base and the wire mesh of the oil pick up screen.

brass or copper shards.jpg

I found no shards in the sump, but think whatever it is could have been sucked through the wire mesh and perhaps ended up on the big ends, causing the strange pit marks as per the picture below.

big end pitting.jpg

Does anyone have any ideas or previous experience of where in the engine copper or brass of this nature was used that could possibly have ended up on the oil pick up ?
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Steel shells copper overlaid before white metal , or whatever they call white metal now. Experts Please answ.? Lead Indium or some funny name like that?
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The pits in the white metal are probably down to acid erosion caused by old contaminated oil maybe?
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Quote:
Originally Posted by zulu ferret View Post
Steel shells copper overlaid before white metal , or whatever they call white metal now. Experts Please answ.? Lead Indium or some funny name like that?
Quote:
Originally Posted by zulu ferret View Post
The pits in the white metal are probably down to acid erosion caused by old contaminated oil maybe?
Zulu, do you mean its from damaged bearing shells? This is the first time the motor has been opened and both main-and big ends were in good condition, apart from slight big end pitting.
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This is the first time the motor has been opened and both main-and big ends were in good condition, apart from slight big end pitting.
So you had this car from new. In that case this is very strange to find those pieces in sump
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Bit's of a sump plug? I bought a 146 with a glued in plug that had been shredded by a garage the previous owner went to. Had to fish all the bits out with a magnet.
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If you are talking about the journals themselves being ok, then you should be fine with new shell bearings.:

But, flush the system out and check for metallic swarf again prior to new oil and filter maybe.
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Hardly likely for the steel sump plug to shed fragments Unqestioned. More likely to be the aluminium threads that gave out?

Used a magnet? Ferrous debris then? Check that out asap.
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Some of that stuff could have been there for years or from new. Unless you can find a component that has failed or is badly worn I would not worry too much.
You say that the main and big end shells are in good condition, I don't agree. You have caught the big ends just in time. The shells are scuffed (the dark areas).
In general bearing wear like that is usually caused by extended oil changes, wrong oil or revving on start up. I would never let a TS engine run to 10K on oil changes whether it burns oil or not. Some owners think that engines that burn oil are self changing. I'm not suggesting any of that applies to you. Your rebuild will give the engine a new lease of life for sure.
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Quote:
Originally Posted by zulu ferret View Post
Hardly likely for the steel sump plug to shed fragments Unqestioned. More likely to be the aluminium threads that gave out?

Used a magnet? Ferrous debris then? Check that out asap.
The OE plugs aren't steel, I've seen 3 that have been shredded by over ambitious garages.
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Balancer bearings?

Unless you have the car since new i would say it ran bearings previously.
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