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Old 04-20-2014, 03:54 PM   #1
dgjackson40 OP
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Expansion Tank Gunk!

Back in February I had posted a thread about my collapsed radiator hoses. I never really figured it out. Since I have the radiator off completing other work I took the expansion tank off and began to rinse it out. There was a whole slew of gunk in the lower corner where the lower hose enters. That lower hose had to be clogged. Is this stuff from the casting sand I keep hearing about or what could this be? Should I roll it and smoke it??





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Old 04-20-2014, 05:29 PM   #2
gozirra
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I would say rubber from the coolant lines that have started deteriorating, maybe some bits from the water pump seals.

I have seen similar on vehicles and it seemed to be related to old rubber lines, sediment may be likely in most tanks from almost anything but that amount would get me to inspect things.

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Old 04-20-2014, 05:48 PM   #3
spafxer
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I have noticed that my '06 bike's expansion tank coolant level doesn't go up and down as I would expect. I think you may be on to something here that I haven't seen reported before.

Hose deterioration should be possible fiber material and oxidized rubber like carbon black. Sand casting material should be , well sand

I will have to go inspect mine.


Thanks for posting
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Old 04-20-2014, 05:53 PM   #4
Chuckracer
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I wonder what's still in the radiator.
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Old 04-20-2014, 06:04 PM   #5
dgjackson40 OP
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Radiator

Quote:
Originally Posted by Chuckracer View Post
I wonder what's still in the radiator.
I cant see any in the radiator and I have flushed it really well. I didn't see anything like that come out of it during the flush. I used a hose with fairly good pressure to clean it out. I don't see anything peering into the hoses either. When I get the side cover back on after WP rebuild I'll flush out the engin real well also and see what comes out.

I am going to let that stuff dry out thoroughly and take a closer look.
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Old 04-20-2014, 09:18 PM   #6
HeatXfer
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Looks like part of an old rag.
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Old 04-28-2014, 08:32 AM   #7
dgjackson40 OP
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Mystery Solved

When I posted this I had spoken to the PO and he couldn't think of what it could be, he has since let me know that he had in fact thought he was losing coolant and had put some "stop leak" in the radiator. I forgot to ask if he put it directly in the radiator on tried to introduce it into the expansion tank. At any rate that has to be what it is. Glad I took the tank off and flushed it well. Just hope I flushed it well enough. I took a 200 mile ride Saturday and had no overheating issues. 4 bars the entire trip.

I would advocate not introducing "stop leak" to these small radiators.
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Old 04-28-2014, 10:27 AM   #8
05magmn
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Looks like bars leak!! Or you can call them rabbit turds in a can! LOL!
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Old 04-29-2014, 01:37 AM   #9
rossguzzi
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If you need to plug a small hole in a radiator, use some fine ground black pepper. Much better than that bars leak crap !!
I always carry a small container.
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Old 04-29-2014, 12:34 PM   #10
dgjackson40 OP
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Aaachooo!

Quote:
Originally Posted by rossguzzi View Post
If you need to plug a small hole in a radiator, use some fine ground black pepper. Much better than that bars leak crap !!
I always carry a small container.
That is good to know! Don't think I'll use the "rabbit turds" unless no other choice available.

"Wow! Wabbit Twacks!" "There's a wabbit in my baffwoom!"
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