Radiator question 1200

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Radiator question 1200

Post by lukeinmexico » Sun Mar 06, 2016 11:49 am

Hi Guys,
I recently had my radiator serviced which included a paint job.
When I got it home I realized they painted the top tube where the radiator caps mounts to the radiator. I called the shop and they told me it would be fine, but if I have problems with it to bring the bike in and they would take care of it. It seems to me I should ask the shop to remove the paint while the radiator is off the bike.
Am I crazy to worry about this?
I'm worried the paint will chip and lead to a leaky radiator cap seal.
Any suggestions would be great.
Thank you in advance.

Dan J
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Motorcycle: 1983 GL1100A Aspencade

Re: Radiator question 1200

Post by Dan J » Sun Mar 06, 2016 4:51 pm

If it were up to me I would plug up the bottom hole directly beneath where the cap attaches as shown in your picture and remove all of the paint with a "Scotch" pad or whatever you have that works to remove the paint in the neck and at the top where the cap mates and then turn the radiator upside down before removing the plug so particles don't fall into the radiator. That way you won't have any doubt about the paint chipping and making it's way into your cooling system even though the radiator cap is rarely removed since the cooling system is topped off at the overflow reservoir. Don't forget to use either Honda brand coolant or an equivalent which is free from silicates and borates as these additives are detrimental to the cooling system on our bikes. Also if you are not using a "Pre-mix" make sure and use Deionized water.

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Re: Radiator question 1200

Post by Aussie81Interstate » Sun Mar 06, 2016 5:18 pm


It won't make any difference at all, if any micron of paint falls off or wears off it won't clog your radiator - and for that tiny amount that was sprayed on - it would amount to less than a drop - I think you are pretty safe to reinstall the radiator, fill it up and go riding.


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Re: Radiator question 1200

Post by WingAdmin » Mon Mar 07, 2016 12:07 pm

I agree - it likely isn't going to make any difference at all. If you're really worried, do as described above and after plugging the neck, use a soft abrasive (Scotchbrite is good) to remove the paint from the lip where the cap gasket contacts it. Rinse away scraped paint, remove the plug, and go riding.

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