Coolant Overflow - MVAgusta.net
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post #1 of 26 (permalink) Old 01-11-2012, 04:46 AM Thread Starter
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Cool Coolant Overflow

Hi Guys,
I am a proud owner of a MV Brutale 910 S and it is a great bike.
My only real issue is that i need to top the Coolant up every second ride . As i live in the city of Sydney it does get hot , but I should not have to do this should i ???
The Bike was purchased new by me and it is standard other than my new Rizoma Mirrors. The bike runs cool on the highway but when the temp is over 96 , coolant drips from the overflow at the lights.
Any suggestions would be apreciated.

Regards

John
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post #2 of 26 (permalink) Old 01-11-2012, 05:04 AM
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Are you sure your really NEEDING to top it up all the time? Are you filling the overflow right up to the top of the bottle? You don't need to do this. This is the reason its overflowing all the time as coolant expands with heat. The overflow bottle needs to be maintained 'when cold' between the Max and Min marks. This in turn give the bottle room to expand when coolant gets hot and also coolant to recover back to the radiator when it cools down.
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post #3 of 26 (permalink) Old 01-11-2012, 05:21 AM
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Quote:
Originally Posted by JA01 View Post
Hi Guys,
I am a proud owner of a MV Brutale 910 S and it is a great bike.
My only real issue is that i need to top the Coolant up every second ride . As i live in the city of Sydney it does get hot , but I should not have to do this should i ???
The Bike was purchased new by me and it is standard other than my new Rizoma Mirrors. The bike runs cool on the highway but when the temp is over 96 , coolant drips from the overflow at the lights.
Any suggestions would be apreciated.

Regards

John
Likely..air in the system....When you stop..heat from engine block shunts into coolant jacket which as not circulating as fast as when under way and is also not being cooled by rad as much as bike is stationary at lights causes expansion of the air pocket which shoves coolant up into the bottle and then you get the drips from the overflow.

How I cured it...

From cold. with fluid at correct level as per manual....take off coolant cap....start the bike and let temp build to about 80 deg...ie do not let it boil. bubbles should rise...On my F4 I tilt bike left to right a few times to release air trapped in the lower parts of the rads.

Let the bike cool down..top up if necessary.

Ride the bike

I repeated this a few times over the next few days..Problem solved.

Conclusion...It is unlikely to succeed at filling and purging the rad of air in one go..It takes a bit of method..but not alot !

joe
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post #4 of 26 (permalink) Old 01-11-2012, 05:26 AM
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You should not have too much issue with air in the system like some do on the F4's, do NOT fill your coolant higher than the LOW level with the bike up straight and cooled down.

And congrats with the new bike and welcome to the forum mate.

Dons Nel
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post #5 of 26 (permalink) Old 01-11-2012, 05:56 AM
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You should not have too much issue with air in the system like some do on the F4's, do NOT fill your coolant higher than the LOW level with the bike up straight and cooled down.

And congrats with the new bike and welcome to the forum mate.
Hi Donsy

Do you recommend that fill to the lower level at cold on the oe F4 1000R too Donsy ? I know u have alot of experience of keeping your bikes cool in difficult conditions..

joe
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post #6 of 26 (permalink) Old 01-11-2012, 06:52 AM
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Thumbs up Hi Joe

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Originally Posted by gotojoe View Post
Hi Donsy

Do you recommend that fill to the lower level at cold on the oe F4 1000R too Donsy ? I know u have alot of experience of keeping your bikes cool in difficult conditions..

joe
Absolutely Joe, I never filled mine over the LOW mark before I did the oil cooler conversion.

Dons Nel
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post #7 of 26 (permalink) Old 01-11-2012, 06:59 AM
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cheers Donsy, I'll use that tip next time I am topping up etc

joe
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post #8 of 26 (permalink) Old 01-11-2012, 07:40 AM
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I have had the same problem. It will most likely stabilize at the min mark as it did for me.

Brutale 910R Hydrogen
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post #9 of 26 (permalink) Old 01-11-2012, 07:48 AM
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Now I get it, It's like beer....If you put too much in the glass you spill it lol
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post #10 of 26 (permalink) Old 01-11-2012, 02:25 PM
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Some problem with my 750s!
If you search on the forum you'll find that more people have this "problem"

Just dont't fill her up above the LOW level, never had any heating problems until now !

Cheers,
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