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Author: Subject: Zx10 coolant system, please help
Rosco86

posted on 29/5/16 at 03:52 PM Reply With Quote
Zx10 coolant system, please help

Right, I'm having a bit of trouble with my coolant system

Here's the standard zx10 diagram



Here's mine



I have removed the std bike pump and fitted an electric pump, also I've taken the centre out of the thermostat.

The problem I'm getting is if I run it as it is in my drawing it sucks air down the two bleed pipes into the system, the pump sounds rubbish and the extra air in the system causes the water level in the header tank to rise,

But when the pumps is switched off it bleeds the air back out and the level drops to where it was at the start,

If I clamp both the bleed pipes shut where I have put an arrow and a *, then re run it, it runs perfect with no air and the water level in the tanks stays still

I don't really know why I went with a header tank over the standard exspation tank, but I could change it over if this is going to work better

Also the pump seems to shift a lot of water, and originally I thought this was why it was sucking air, but I've fitted a speed control to the pump and it still sucks the air on its slowest speed





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Toprivetguns

posted on 29/5/16 at 04:43 PM Reply With Quote
Hello mate - I can email you pictures of my zx10 coolant setup.


u2u sent





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Toprivetguns

posted on 29/5/16 at 04:47 PM Reply With Quote
Ps what height is your header tank? Is it above the radiator top hose?





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Rosco86

posted on 29/5/16 at 05:32 PM Reply With Quote
Yeah please, I will pm you my email


And yeah the tanks higher, if I take the bleed hose off the top of the rad, coolant runs out





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chris

posted on 29/5/16 at 05:51 PM Reply With Quote
got your bleed pipes in wrong position because of pump bleed pipes in front of pump it will pump the water out behind pump will suck air in if pump to powerfull probably have to go for a sealed sytem to cure it

[Edited on 29/5/16 by chris]

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Rosco86

posted on 29/5/16 at 07:47 PM Reply With Quote
quote:
Originally posted by chris
got your bleed pipes in wrong position because of pump bleed pipes in front of pump it will pump the water out behind pump will suck air in if pump to powerfull probably have to go for a sealed sytem to cure it

[Edited on 29/5/16 by chris]


Right ok, I thought the bleed pipes need to be on the high points, can I run them low down? Also how would I convert to a sealed system?





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Rosco86

posted on 29/5/16 at 07:50 PM Reply With Quote
Here's a few pics

Here's the water pump sucking from the lower rad hose



Top pipe from top of engine to top rad hose, also you can just see the pump lower down, also bleed hose of top of the rad



Header tank t'd into lower hose running from the pump to the low input on the engine







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chris

posted on 29/5/16 at 08:05 PM Reply With Quote
think you will need a pressure rad cap with expansion and draw back feed
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Rosco86

posted on 29/5/16 at 08:17 PM Reply With Quote
quote:
Originally posted by chris
think you will need a pressure rad cap with expansion and draw back feed


Ok, I could remove the header tank, fit one of these in the top rad hose,

http://www.carbuildersolutions.com/uk/in-line-radiator-filler-neck-25mm

Then run a pipe from the new filler neck into the bottom of an expansion tank?

Is this correct? Also what would I do with the bleeds, join the stat bleed to the rad bleed?

[Edited on 29/5/16 by Rosco86]

[Edited on 29/5/16 by Rosco86]

[Edited on 29/5/16 by Rosco86]





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Rosco86

posted on 29/5/16 at 08:32 PM Reply With Quote
Or can I block off the bleed points on the stat and rad top, and block off the pipes on my header tank and just run it like that?





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chris

posted on 29/5/16 at 08:53 PM Reply With Quote
I think I would fit the inline filler neck then just shorten the bleed pipes then fit air bleed pips to them to ease filling

[Edited on 29/5/16 by chris]

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Angel Acevedo

posted on 29/5/16 at 11:47 PM Reply With Quote
IMHO you only need to make sure the bleed lines are under water at the tank so the pump doesn't pull air.

HTH





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Rosco86

posted on 30/5/16 at 06:53 PM Reply With Quote
Well had another look today, I've blocked off the two bleed pipes at both ends and I'm just going to use the header tank as the filler neck so to speak, runs Sweet like this, if I get any problems I'm going to make a new header tank that's taller so the two bleed pipes are under water I think,





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SausageArm

posted on 4/6/16 at 04:52 AM Reply With Quote
quote:
Originally posted by Rosco86

Here's mine





I'd move the connection at the bottom of your header tank from the pump outlet to the inlet side of the pump.

Here's how I have my ZX10R plumbed in, it works fine.


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CosKev3

posted on 4/6/16 at 07:26 AM Reply With Quote
As above,I think if you had your header tank feeding into the inlet feed to pump both of your bleed hoses would work properly too.
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Andy B

posted on 5/6/16 at 03:16 PM Reply With Quote
System is fine except feed from header tank should be on intake six not pressure - relocate and it will work fine no need to d anything with bleeds etc
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