Coolant Level goes down - Page 3

peperino · 10-26-2015, 10:42 AM

Does the coolant ever returns from the overflow bottle? If so, how?

keithmaine · 10-26-2015, 11:31 AM

The over flow (or expanding coolant) from the hot radiator flows into the tank from the bottom. When the engine cools (coolant contracts) it creates a vacuum and sucks the coolant from the tank back into the radiator.

peperino · 10-26-2015, 11:33 AM

Its a kind of magic

SpudRider · 10-26-2015, 01:30 PM

Yes, the coolant overflow bottle of the RX3 operates the same way as an automotive system.

pepelepua · 10-27-2015, 01:51 PM

After 1st refilling and a 300 km ride, the level goes down only about 1/2".

mouradjan · 10-29-2015, 08:41 AM

Hi, i have been using rx3 for about 10k kms.i filled radiotor water about every 1K kms.Not too much but about 100/150 ml water.Everytime when i stop the motorbike i see water coming from this hole.And this picture is taken about 5 min after running.U can see the water.
After reading your comments i checked every piece of radiotor .There is No leak.
So do u say i have to add a different coolant to change the boiling point of water? Will it work to stop it leaking?

Weldangrind · 10-29-2015, 10:56 AM

You will not increase the boiling point of water by adding liquids; only pressure can do that. Water has an amazing latent heat of vaporization, and it will absorb a terrific amount of heat before changing from 212F/100C.

Adding coolant / antifreeze will lower the freezing point, lubricate the water pump and prevent corrosion.

It's difficult to see from your picture, but if that's the water pump weep hole, the water pump seal is leaking.

It's difficult

SpudRider · 10-29-2015, 01:33 PM

Quote:

Originally Posted by mouradjan

Hi, i have been using rx3 for about 10k kms.i filled radiotor water about every 1K kms.Not too much but about 100/150 ml water.Everytime when i stop the motorbike i see water coming from this hole.And this picture is taken about 5 min after running.U can see the water.
After reading your comments i checked every piece of radiotor .There is No leak.
So do u say i have to add a different coolant to change the boiling point of water? Will it work to stop it leaking?

Quote:

Originally Posted by Weldangrind

...It's difficult to see from your picture, but if that's the water pump weep hole, the water pump seal is leaking.

Yes, that hole is the weep hole for the water pump. You need to drain the oil, remove the right crankcase cover, and replace the water seal.

mouradjan · 11-11-2015, 01:58 PM

Quote:

Originally Posted by SpudRider

Yes, that hole is the weep hole for the water pump. You need to drain the oil, remove the right crankcase cover, and replace the water seal.

Thank u Weldanegrid & SpudRider .
I changed the water seal which is in the water pump .There is one more seal in right crankcase .I only removed the water pump and changed the one which is causing to drain water from the 1mm weep hole .i have a photo of the seal .May be it may help to Rx3 owners ☺.

SpudRider · 11-11-2015, 02:12 PM

You're welcome.

I hope the new seal fixed the leak.

I see the water pump seal is size 12x24x6. Thanks for posting the update, and the photo.

10-26-2015, 11:31 AM	#32
keithmaine Join Date: Oct 2015 Location: White Mtns. NH Posts: 488	The over flow (or expanding coolant) from the hot radiator flows into the tank from the bottom. When the engine cools (coolant contracts) it creates a vacuum and sucks the coolant from the tank back into the radiator. __________________ 2016 Versys 650 LT, 2015 RX3 Red, 2011 Ural GearUp,
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10-26-2015, 01:30 PM	#34
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Yes, the coolant overflow bottle of the RX3 operates the same way as an automotive system. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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10-27-2015, 01:51 PM	#35
pepelepua Join Date: Aug 2015 Location: Buenos Aires, Argentina Posts: 30	After 1st refilling and a 300 km ride, the level goes down only about 1/2". __________________ Pablo. Today Riding a Corven Triax 250 Touring (Zongshen RX3)
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10-29-2015, 10:56 AM	#37
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	You will not increase the boiling point of water by adding liquids; only pressure can do that. Water has an amazing latent heat of vaporization, and it will absorb a terrific amount of heat before changing from 212F/100C. Adding coolant / antifreeze will lower the freezing point, lubricate the water pump and prevent corrosion. It's difficult to see from your picture, but if that's the water pump weep hole, the water pump seal is leaking. It's difficult __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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11-11-2015, 02:12 PM	#40
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	You're welcome. I hope the new seal fixed the leak. I see the water pump seal is size 12x24x6. Thanks for posting the update, and the photo. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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10-26-2015, 10:42 AM	#31
peperino Join Date: Aug 2015 Location: Buenos Aires, Argentina Posts: 135	Does the coolant ever returns from the overflow bottle? If so, how?
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10-26-2015, 11:33 AM	#33
peperino Join Date: Aug 2015 Location: Buenos Aires, Argentina Posts: 135	Its a kind of magic
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