12-11-2015, 06:40 PM | #1 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Cfmoto vnight coolant change advice
I have just gone through the process of flushing and replacing the engine coolant.It was a very difficult job bleeding the system of air but eventually got there.The service manual for the engine doesn't mention the method used to replace the coolant.However when I examined the diagram of the water pump there are three bolts (items 6)for disassembling the pump plus an extra bolt at the top of the pump that is not mentioned in the service manual.
Would somebody know if this extra bolt in the case of the pump is a bleed screw for the coolant? |
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12-11-2015, 07:00 PM | #2 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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The bleed bolt will usually have a copper washer beneath the bolt.
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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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12-11-2015, 09:38 PM | #3 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Thanks mate I shall check.
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12-12-2015, 12:03 AM | #4 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Checked the "bleed bolt" and it's washer is either steel or aluminium.The bolt is quite hard to reach behind the frame of the bike so will have to find another way to bleed the system.Anybody have any suggestions.
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12-12-2015, 12:19 AM | #5 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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You can remove the water pump cover. How did you drain the coolant this time?
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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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12-12-2015, 03:01 AM | #6 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
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I disconnected the bottom radiator hose to drain the system and flushed the system with demineralised water.After reconnecting the bottom hose the system was then refilled.The problem I had then was removing the trapped air.it took a couple short runs on the bike and topping up between runs to clear the air from the system.There has to be a better way of doing it than this to remove the air.
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12-12-2015, 08:10 AM | #7 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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If you remove the water pump cover you will drain the coolant at its lowest level. This is less convenient, but equivalent to draining the coolant from the drain bolt.
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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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12-12-2015, 02:22 PM | #8 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Thanks Spudrider.Removing the pump cover would be quite a drama as the main frame of the bike covers the top of the pump.The way the system is set up the pump is not the lowest point,the bottom radiator hose is.The problem that concerns me more is when you come to refill it and removing the trapped air in the head.I am going to monitor the coolant level and engine temps over the next few days to ensure there are no changes and all the air is out of the system.
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12-12-2015, 04:16 PM | #9 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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The water pump cover is the lowest point in the cooling system for all my dirt/adventure motorcycles. Therefore, I was unaware of the different design for your street bike.
I think you are following the best procedure to eliminate any air voids in the cooling system. If necessary, keep adding coolant until the radiators won't accept any more.
__________________
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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12-12-2015, 09:15 PM | #10 | |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Quote:
I have been rechecking coolant level.The first check I added 65mls.Subsequent checks were about 5mls. |
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12-12-2015, 10:07 PM | #11 |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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I think you are doing everything you can to eliminate air voids in the cooling system. Keep checking the coolant level in the radiator, and keep adding coolant, as necessary.
__________________
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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12-12-2015, 10:52 PM | #12 |
Join Date: Nov 2015
Location: Sydney,New South Wales,Australia
Posts: 35
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Thanks mate for your help and support.
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