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Old 04-21-2006, 06:09 PM   #1
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Join Date: Apr 2006
Location: Boise, ID
Motorcycle: 06 GSX-R1000
Posts: 144
Silicate Free Coolant?

The owners manual doesn't say anything about using a coolant solution which is free of silicates. It only says to use a solution safe for aluminum radiators/engines.

The other day when I had the tupperware off my new 06 I noticed the coolant was low. So reluctantly I grabbed some prestone 50/50 and topped it off. It didn't take much not even a whole cup.

I was reading an article today about how it's bad to use coolant containing silicates in motorcycles. Ack!

Since it's so diluted, should I worry much about it?

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Old 04-21-2006, 06:30 PM   #2
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Join Date: Apr 2001
Posts: 11,910
Re: Silicate Free Coolant?

Silicate and non-silicate-based coolants don't mix well. In fact, they're considered non-compatible. It appears that even a small cross-contamination will impact protection.

There seems to be chemical incompatibility between the two, resulting
in corrosion inhibitors falling out of suspension. It's believed that the acids in the organic
non-silicate coolants will tend to cause residual leftover silicates to fall out of
suspension. Apparently, this will affect corrosion protection and possibly add
(how much I don't know) to silicate-caused negative results.

I can't see it corroding in a single riding season (esp here in Boise), so I say ride and then change it before winter.
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