Question about 1996 BMW 318

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Looks like gold dust in radiator ?????

Bit of a strange one for me ? , i am quite clued up with motors
but havent seen this before.
When you open the rad.cap and look in floating on top of
the water there is , well only what i could say as gold dust, i know sounds strange //??, might be something normal, but worryed may be a problem
somewhere in the cooling system, the car is a bmw 518i l reg ,car has newer style engine in it about two three years newer than the car,and has only covered 68000 miles.
any help would be greeeeat ...

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  • bigandytime Jun 13, 2008

    great advice and has set my mine a bit at ease.......



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Hi there,

If the coolant is the first lot in there, then any machining debris, laquer, and any dust or powdery swarf that's accumulated during the manufacturing processes. Coolant is not filtered like oil, so will just circulate untill it's drained out.
I would not worry about it.
You may be closer to the truth than you think as it may be bronze powder created during the running-in of the coolant pump.

It will not affect the operation in any way, and usually sinks harmlessly out of the way.

The user manual will probably recommend a full change in 36 months - or sooner anyway.

I would only be concerned if the coolant pump was starting to leak or make noise, if so replace it if and when it does.

Posted on Jun 12, 2008

  • Richard Perkins
    Richard Perkins Jun 14, 2008


    I hope thet puts your mind at ease. If you hadn't have looked - you would not have worried about it.

    If you consider I could have helped more, then I understand your rating. If you are satisfied with the answer, can I request a fixya from you?.....It's like a brownie points system to us.




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