White stuff in coolant


You could send a sample to BlackStone labs. They will test the oil and antifreeze.
https://m.blackstone-labs.com/

Not cheap but not expensive either. I’ve used them a couple of time. The information they provide on the samples will explain what you have going on.
 
Coincidently, "Rook" was my Dad's nickname during his WWII B-17 bomber pilot days.....35 missions. I'd upload picture of his jacket but keep getting, "security error".....?

Okay, maybe this will work.....
 
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Are you saying that the jacket is the cause of the white stuff in the coolant????

Very nice though. Probably worth a small fortune on one of those shows like American Pickers.
 
Oh my Oh my people! This is getting out of hand! lmao

I tried the coffee filter at first and since the substance is white I didn't see anything, it just clogged up the filter.

Then I Scooped some off the top of the jar with a dark shop towel. It's definitely white.
It doesn't cling to a rag, it's not oily, it's very fine but it clumps from time to time. And will equally dissolve in the jar quite rapidly when disturbed.

I believe it is paper or some other fiber that was in either the new radiator or one of the hoses I changed last year.
I don't want to admit the possibility but since the bike was apart for so long last year, maybe I left a piece of shop towel or scott towel somewhere. :0

@RockOn Nice jacket!