12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHstrange deposit in coolant
Leading reported evidence
Run clear
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
Having failed to drain all the coolant, I decided to flush it out until it ran clear then refill with new G30.
Leading evidence: 'Run clear' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'failure and not something ive ever seen' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check pulley' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
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Discussions that suspect a cause
1
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Suspected cause
probably an old failure and not something ive ever seen but to be honest i dont look at the coolant in that detail .
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Suggestion
Have you removed the water pump and or checked the pulley for play?
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Suggestion · Original poster
Nice new clean antifreeze in place so I'll move on.
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Discussions that contain suggestions
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Suggestion · Original poster
Yes think you're all right and I certainly feel happier with clean G30 in the car.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T191851Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Having failed to drain all the coolant, I decided to flush it out until it ran clear then refill with new G30.
On the final rinse the last bucket of drained water was sparkling in yesterday's bright sunshine. At the bottom of the bucket I found what looked fine copper glitter. Any ideas where it might have come from?
Have you removed the water pump and or checked the pulley for play?
Looks like you pumped has either failed now or in the past and this is the debris I'd expect to see from a copper impeller version lunching itself (if it's not a plastic OE pump).
Pull pump for piece of mind
I've put an LTT in but can't see why that would do it. The metal flakes weren't visible in the coolant I took out (it was too cloudy green) but I've let it settle and I'm going to look in the bottom of it for any further deposits.
I think Harv is bang on the money with his theory ..
I sat here trying to think whats copper in the cooling system .. water pump .. probably an old failure and not something ive ever seen but to be honest i dont look at the coolant in that detail .
rad weld .. again what Harv said .. it looks more like copper and who would ever use it .
Glad no-one's come up with a copper danger point in the cooling system, Harv/Iain I think you're probably right, thanks.
Nice new clean antifreeze in place so I'll move on.
Only a tiny smear on one of the bolts that was slightly corroded, I did wonder whether there could be any copper in the new thermostat but there was quite a lot of copper in the bucket. I will look in the bottom of the container with the old antifreeze today.
I also need to decide how to dispose of the old antifreeze, I'll probably start with a trip to the council dump on Monday to see if they'll take it, sadly I think I already know the answer....
There are a few coolant additives that have copper looking particles in them...
Bars leaks liquid copper amongst others..
Basically,someone has put a stop leak in your coolant system...
As said Mike, it looks like K seal or similar. Maybe just a tight previous owner trying to stop a weeping corroded rad.
As long as your rads are good now and temps ok, then I wouldn't worry.
