Coolant leak - Honda RC51 Forum : RC51 Motorcycle Forums
 
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post #1 of 9 (permalink) Old 01-18-2014, 08:00 PM Thread Starter
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Coolant leak

Well, I arrive home and notice a small pool of coolant under my stored 2005 RC51. I cleaned up the mess, took off the left fairing, and had a look around. It seemed like the coolant came from a hose near the reservoir, but l couldn't see too much with a flash light. So, the weather was about minus 40 degrees CELSIUS in December and the start of January, then warmed up to plus 6 celsius the past week. The engine block, etc wouldn't have cracked I would imagine, and the hoses look ok. Would this be a matter of a 50/50 mixture (regular coolant) and a deep freeze then thaw? Has anyone encountered this before?

Thanks
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post #2 of 9 (permalink) Old 01-18-2014, 08:20 PM
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I've experienced a coolant leak on my SP1, it was coming from the upper hose of the radiator (loose connecter). It is possible that the leak was caused by the change in temp (hose expanding and contracting) and the hose connector is loose.

2001 SP1 (sold)
2004 SP2 (properly stored)
2012 Ruckus (stolen)
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post #3 of 9 (permalink) Old 01-18-2014, 08:42 PM
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Pending on the coolant type and age, it could have froze at that Artic temperature.

I have Engine Ice in mine which is good to about ~-18 degrees F, but I put a heater out there with mine.

Hopefully if it did freeze it just pushed a hose off or ruptured a hose. It is worth pulling the fairings and giving her a better look.

Also, please keep this Canadian air out of Indiana, we've had enough.

Gook luck to you.



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post #4 of 9 (permalink) Old 01-19-2014, 06:11 AM
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if it is a busted hose, sounds like a good excuse for a Samco hose kit. My hoses were a wreck on SP1, they all needed to be replaced.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
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post #5 of 9 (permalink) Old 01-19-2014, 09:38 AM
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We can speculate till springtime, you have to pull the fairings and inspect.

John, 2000 RC51 #000100

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post #6 of 9 (permalink) Old 01-19-2014, 09:55 AM
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I had a leak once.....checked everything without removing the cowls. I even replaced the rad cap figuring it had a loose spring.
Then I removed the RH lower cowl to do a different job and I found the leak.
The hose that connects the two rads was loose on the RH rad clamp.

Like JohnDog said, you need to remove the cowls.
Loosen up each clamp, push the hose firmly all the way in and tight the clamp up again nice and tight.
Also check for coolant residue on the crankcase between the cylinders.
If you see even a drop there, you'll have to remove the throttle bodies too and check the hose clamps around the thermostat housing.

If you are not going to remove any hose, you don't have to dry the coolant out.


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post #7 of 9 (permalink) Old 01-19-2014, 04:00 PM Thread Starter
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Right on, thanks for the replies. I will be doing more checks when the weather warms a little. I don't need to break clips etc in this frigid cold! I had a look at the Samco site and those hoses look nice. I couldn't find a price though.
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post #8 of 9 (permalink) Old 01-19-2014, 04:23 PM
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They run around 200 for a set. Expensive, but they will last forever.

2001 Honda RC51 SP1
1996 Honda CBR 900RR
2003 Aprilia RSV Mille R
1999 Aprilia RS50
2012 Triumph Daytona 675R (Sold)
2010 BMW S1000RR (Sold)
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post #9 of 9 (permalink) Old 01-20-2014, 01:52 AM
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I bought my Samco kit off eBay for 130 GBP a couple of years ago

Every now and then you can find a kit on sale


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