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

Hello mate - I can email you pictures of my zx10 coolant setup.


u2u sent

Ps what height is your header tank? Is it above the radiator top hose?

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

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]

quote:

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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]

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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

think you will need a pressure rad cap with expansion and draw back feed

quote:

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Originally posted by chris
think you will need a pressure rad cap with expansion and draw back feed

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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?

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]

IMHO you only need to make sure the bleed lines are under water at the tank so the pump doesn't pull air.

HTH

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,

quote:

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Originally posted by Rosco86

Here's mine

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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.

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