Thinking of throwing in the towel

WLJayne said:

Take a butcher's at this. You see how the flow directions conflict where the tank feed hose meets the coolant rail? That's what's going wrong here, the coolant is being pushed up the wrong way!

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Where'd you find that? Did he fix it?

jamesmartin said:

depends on the temp it reached and its stability temp ,heads vary ,so not all, there isnt an easy cure ,new or another head ,ive seen valve seats that have fallen out of relaxed heads

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Ok that's a possibilty, though i'm still not sure why we see the same effect even when the engine is not running and is cold. But it might be that. Any other ideas of what it might be?

Diesel Do said:

Where'd you find that? Did he fix it?

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No I did it, just sent it as part of an email to DC.

Diesel Do said:

Where'd you find that? Did he fix it?

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Looks like the pump needs to be after the inlet! So it drags it out instead of forcing it in?!?!?

WLJayne said:

Ok that's a possibilty, though i'm still not sure why we see the same effect even when the engine is not running and is cold. But it might be that. Any other ideas of what it might be?



No I did it, just sent it as part of an email to DC.

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Who's a clever chap

T in bottom hose before pump with pipe from tank, blank existing one?

Looking at that pic, could mounting the ewp where you did have anything to do with it? Looks to me like you've fitted it in a return feed pipe. Any chance you could put it into a pressure feed pipe?

Just a thought ...

WLJayne said:

Ok that's a possibilty, though i'm still not sure why we see the same effect even when the engine is not running and is cold. But it might be that. Any other ideas of what it might be?



No I did it, just sent it as part of an email to DC.

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coolant can only come out of cap with a cold engine ,with hgf usually or is a different problem

K series there is a surprise

It has to go in the cold one to make it last longer!

Paul D said:

Looking at that pic, could mounting the ewp where you did have anything to do with it? Looks to me like you've fitted it in a return feed pipe. Any chance you could put it into a pressure feed pipe?

Just a thought ...

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DC always recommend fitting it in a return line.

have a look at this....
When cold, the thermostat is closed and coolant is prevented from circulating through the radiator. Coolant is able to circulate through the bypass and heater circuits.
As the temperature increases, the thermostat gradually opens, bleeding cool fluid from the radiator bottom hose into the cylinder block and allowing hot coolant to flow to the radiator through the radiator top hose, balancing the flow of hot and cold fluid to maintain the optimum operating temperature. When the thermostat opens fully, the full flow of coolant passes through the radiator.
An expansion tank is fitted to the right hand shock absorber mounting. Any excess coolant, created by heat expansion, is returned to the expansion tank through bleed lines from the top of the radiator and from the cylinder block. The expansion tank has an outlet pipe which is connected into the coolant circuit. The outlet pipe supplies coolant into the system when the engine is cool. This replaces coolant displaced to the expansion tank due to heat expansion.

jamesmartin said:

coolant can only come out of cap with a cold engine ,with hgf usually or is a different problem

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Think you've missed the point of all this! It will do it with the engine turned off, stone cold, and the pump running, it's electric it can do that! It doesn't have to be hgf in this case, normally yes, but this in not normal!

The Mad Hat Man said:

DC always recommend fitting it in a return line.

have a look at this....
When cold, the thermostat is closed and coolant is prevented from circulating through the radiator. Coolant is able to circulate through the bypass and heater circuits.
As the temperature increases, the thermostat gradually opens, bleeding cool fluid from the radiator bottom hose into the cylinder block and allowing hot coolant to flow to the radiator through the radiator top hose, balancing the flow of hot and cold fluid to maintain the optimum operating temperature. When the thermostat opens fully, the full flow of coolant passes through the radiator.
An expansion tank is fitted to the right hand shock absorber mounting. Any excess coolant, created by heat expansion, is returned to the expansion tank through bleed lines from the top of the radiator and from the cylinder block. The expansion tank has an outlet pipe which is connected into the coolant circuit. The outlet pipe supplies coolant into the system when the engine is cool. This replaces coolant displaced to the expansion tank due to heat expansion.

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It hasn't got a thermotwat anymore.

jamesmartin said:

coolant can only come out of cap with a cold engine ,with hgf usually or is a different problem

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Wayne - yu got the remote thermostat havent you?

The Mad Hat Man said:

Wayne - yu got the remote thermostat havent you?

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It's in the bin

Diesel Do said:

It's in the bin

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Put pipe work back to two pipe system, no stat at all as per DC

Diesel Do said:

Think you've missed the point of all this! It will do it with the engine turned off, stone cold, and the pump running, it's electric it can do that! It doesn't have to be hgf in this case, normally yes, but this in not normal!

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wasnt what i gathered from first post

Hmmmm! It certainly looks as though it is pushing fluid up that pipe. the flow diagram is a bit confusing to say the least.

But the design never has been straight forward .

wonder what would happen if it was blocked off (temporarily)?

Diesel Do said:

Put pipe work back to two pipe system, no stat at all as per DC

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Int in the bin, kept that as it might be worth summat. Only threw away the manky old metal coolant rail as it was rusted to hell.

I don't think you can mount the EWP on the outlet hose as it needs rad cooled liquid to cool itself. If you put it where the coolant is hot they cook within a few k.

It's also possible that this system requires alot less coolant than the original and not having much in the tank is not an issue. Bloody nasty gamble but another possibility.

jamesmartin said:

wasnt what i gathered from first post

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It fills the tank up no matter what the engine is doing, off on hot cold it dunt matter. The coolant comes out when it is hot and under pressure.

Will.

jamesmartin said:

wasnt what i gathered from first post

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Well to be fair he was driving it that time, but the electric water pump seems to push the water past the cap even when not running, it seemed to find a happy level but apparently not which is why hgf is not so likely this time

Diesel Do said:

Well to be fair he was driving it that time, but the electric water pump seems to push the water past the cap even when not running, it seemed to find a happy level but apparently not which is why hgf is not so likely this time

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Could be that its happy level is below the level of the tank! Maybe I fecked it all up by adding more! I still reckon that if the flow capacity to the tank was severly restricted - via a partically closed valve or something - that the coolant would be more inclined to go where it's supposed to go and not up into the tank. Fluid dynamics anorl.