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Old 01-26-2011, 05:40 PM   #1
djoyner
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Default GL1500 - A Question About Coolant

I understand that we should only use silicate-free coolant in Wings due to the possible damage to water pump seals. I've read posts where some recommend using Honda brand coolant.


Is this because Honda coolant is known to be silicate-free or is there another justification? I checked my Wing service manual and it merely states to use 'ethylene glycol coolant'.
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Old 01-26-2011, 06:02 PM   #2
Ron Robertson
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Yes you must you a Silicate free Antifreeze. Any Antifreeze with the Silicates in it will make the seal leak. And that if about $200.00 for the new pump. I use Honda because it comes premixed. After replacing one water pump, I decided not to chance it. I under stand there are other Silicate free coolants out the but I'll just stick with the Honda brand for now.
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Old 01-26-2011, 06:04 PM   #3
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That is good info!! Thanks Ron!!
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Old 01-26-2011, 06:08 PM   #4
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Pulled one of the GL1500 Service Manuals and it does state to refill with a mixture of ethylene glycol antifreeze (formulated for Aluminum Engines) and distilled water. No silicates, as it ruins the water pump and clogs the orifices in the water jacket. You can also use the Honda Automobile coolant too.
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Old 01-26-2011, 06:14 PM   #5
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Back in 97 I put Pres tone in my 93 made a 2500 mile trip to Wyoming a couple days after I got back the water pump started leaking. The Owners Manual for the 93 doesn't say anything about it having to be Silicate free. If I'm not mistaken most Antifreeze is 'ethylene glycol.
I remember there were a lot of guys in one of the Cycle Magazines that were up set because there was no mention of Silicate Free in the owners manual and it cost them a new water pump.
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Old 01-26-2011, 06:40 PM   #6
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Honda does not make antifreeze.
Don't know who makes it but when in doubt stick to OEM.

Silicates are actually scrubbing agents that scrub the inside walls of everywhere fluids go. It is a terrific thing except on plastic and seals. It will also scrub the plastic thru if given long enough.

As for alternatives, Prestone extended life is silicate free. My 96 Silverado has the very same requirement.

Your bike, you decide.
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Old 01-26-2011, 08:48 PM   #7
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I have always used Honda products (oil/gear/filters/coolant, etc) on my Wings. There may be better products out there, but what's a couple of extra $$ compared to a $20k motorcycle. JMHO
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Old 01-26-2011, 09:19 PM   #8
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I agree with two wheel wing. Honda coolant is under $4.00 a quart and it takes 4 qts. so for $16.00 once every two years why chance anything else.
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Old 12-02-2013, 10:08 AM   #9
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Does anyone have the Honda part # for that coolant?
I have a 1987 Interstate and am replacing the hoses and flushing the cooling system...distilled water of course.
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Old 12-02-2013, 02:18 PM   #10
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Here ya go: 08C50-C321S01
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