Flushing my radiator; pieces of rubber coming out.


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PuppyWing
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Motorcycle: 1983 GL1100A Aspencade

Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Wed Dec 27, 2017 8:07 pm



I'm doing a radiator flush with vinegar and distilled water and there are pieces of rubber in the solution after I drain it. Not a lot, but they're noticable. Three flushes so far: Rubber pieces the first time (cool solution drained) , clean the second time (cool solution drained) rubber pieces the last time (warm distilled water drained). This is a recent purchase and I plan on replacing ALL of the gaskets but I would like to know where these pieces are coming from so I can take care of it first. I can provide photos if needed.



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Stanswings
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Re: Flushing my radiator; pieces of rubber coming out.

Post by Stanswings » Wed Dec 27, 2017 8:12 pm

Greetings,
You didn't mention the model or age of the bike but I would venture that you have radiator hoses degrading from the inside. Replace all hoses to be sure. You'll be able to see deterioration on the inside of the old hoses, if that's the case.

PuppyWing
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Re: Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Wed Dec 27, 2017 8:22 pm

Stanswings wrote:
Wed Dec 27, 2017 8:12 pm
Greetings,
You didn't mention the model or age of the bike but I would venture that you have radiator hoses degrading from the inside. Replace all hoses to be sure. You'll be able to see deterioration on the inside of the old hoses, if that's the case.
1983 Aspencade. Probably nothing to worry about in the short term??
Last edited by PuppyWing on Wed Dec 27, 2017 11:06 pm, edited 2 times in total.

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jeffcosmo
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Re: Flushing my radiator; pieces of rubber coming out.

Post by jeffcosmo » Wed Dec 27, 2017 11:00 pm

PuppyWing wrote:
Wed Dec 27, 2017 8:22 pm
1983 Aspencade. Probably nothing to worry about in the short term??
Wrong. Those hoses are ready to burst. Proceed to change, or...

Cosmo

PuppyWing
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Re: Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Wed Dec 27, 2017 11:07 pm

jeffcosmo wrote:
Wed Dec 27, 2017 11:00 pm
PuppyWing wrote:
Wed Dec 27, 2017 8:22 pm
1983 Aspencade. Probably nothing to worry about in the short term??
Wrong. Those hoses are ready to burst. Proceed to change, or...

Cosmo
Thanks for the warning. I will be picking up new hoses tomorrow. Is it okay if the radiator sits dry overnight? Should I do a vinegar flush again or is a distilled water flush okay? The stuff coming out is clear...with the exception of the rubber pieces of course.
Last edited by PuppyWing on Wed Dec 27, 2017 11:12 pm, edited 1 time in total.

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DenverWinger
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Re: Flushing my radiator; pieces of rubber coming out.

Post by DenverWinger » Wed Dec 27, 2017 11:11 pm

After changing head gaskets on 1100's a few times, I've noticed that the surfaces of the gaskets that are open to the water jackets tend to flake off, however this doesn't seem to affect the sealing areas of the gaskets that are sandwiched between the head and block.

It may just be little pieces of gasket that are open to coolant you are finding.... Probably wouldn't hurt to replace 35 year old hoses though. :)
They say 98% of all Hardleys ever made are still on the road..... The other 2% made it home. :lol:
(I stole this from somebody on another GW site...) :roll:

PuppyWing
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Re: Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Wed Dec 27, 2017 11:17 pm

DenverWinger wrote:
Wed Dec 27, 2017 11:11 pm
After changing head gaskets on 1100's a few times, I've noticed that the surfaces of the gaskets that are open to the water jackets tend to flake off, however this doesn't seem to affect the sealing areas of the gaskets that are sandwiched between the head and block.

It may just be little pieces of gasket that are open to coolant you are finding.... Probably wouldn't hurt to replace 35 year old hoses though. :)
I just don't want these little aliens getting jammed in something mechanical like the water pump.

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Re: Flushing my radiator; pieces of rubber coming out.

Post by Aussie81Interstate » Thu Dec 28, 2017 6:23 am

The pieces are definitely rubber - or are they bits of black plastic? I suppose they could be coming from an old radiator cap or maybe some black rtv? but if the hoses feel soft or totally hard - then I would be looking to replace them for starters. Leaving your radiator empty overnight should not be a problem.

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Re: Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Thu Dec 28, 2017 7:17 pm

Update: Pulled the radiator, hoses were intact yet old, pulled the water pump housing cover and there it was. The pieces of rubber were part of a sealant that was applied for water tightness (silicone?). I scraped it off and now have to find an alternative as well as a new o ring. Any suggestions?

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Re: Flushing my radiator; pieces of rubber coming out.

Post by WingAdmin » Thu Dec 28, 2017 10:51 pm

There should be no silicone, RTV or any other kind of sealant applied to the water pump. It uses a gasket.

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Re: Flushing my radiator; pieces of rubber coming out.

Post by PuppyWing » Tue Jan 02, 2018 8:54 pm

WingAdmin wrote:
Thu Dec 28, 2017 10:51 pm
There should be no silicone, RTV or any other kind of sealant applied to the water pump. It uses a gasket.
I don't know the name of the part but it connects directly to the radiator hose. Short screws and exposes the impeller. It has an o-ring, which is being replaced. This is where the overdose of sealant was applied.

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Re: Flushing my radiator; pieces of rubber coming out.

Post by Josterhage » Wed Jan 03, 2018 1:13 pm

Had the same thing happen to me. I replaced the stock Buna o-ring with Viton. Below is the link where you can get one as well.

https://www.metricsealsinc.com/viton-me ... -v80-brown

Hope this helps.



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