Thinking of throwing in the towel

Hey guys,

I just had yet another nervous, temp gauge watching, airlock having ****ty journey back from London. I really thought this **** would be done with the addition of the EWP but it seems that although the EWP does its job it's just moved the problem along. Quite frankly, I'm giving it one more chance and if it ****s with me again I'm selling it to whoever will take it and going back to the Japs. I just can't deal with how little faith I have in this car, much as I really want to love and defend it. A massive temp spike on the M1 inbetween junctions tells me enough is enough.

The problem is exactly the same as when I got it despit all the uprates and mods I have done; coolant loss > refill > airlocks > SHGF.

Only this time the coolant is ****ing out of the top of the header tank due to the pump doing what it's meant to do. I may also be losing a bit out of the main feed hose (again) and I'm basically back to square one several hundred pounds later.

So, I would really appreciate some brains on how to stop coolant coming out of the cap, whether it be through a better cap, or valves/manifolds to restrict flow there. But if I can't stop this coolant loss problem I'm done with it.

For anyone who hasn't really been following the saga of my particular car, yes I've done pretty much every fix on the forum to stop coolant loss and no it's not the water pump or manifolds. I can see tons of coolant staining on the outside of the tank so i'm 99% sure that is the culprit.

Help me guys, I really don't want leave the Land of Rover .

Will.

yuis gonna have the coolant system pressure tested and have a sniff test done to start with.
A new cap aint too xpensive, just to make sure (if yu havent already).

Not sure how you could do it , but a coolant pressure monitoring system might be useful.

has head been overheated before and how bad ,

The cap, header tank and all the hosework is brand new. Cap and tank are GLR. I don't think it's exhaust this time, when the pump comes on I can see the coolant level go right up to the cap - just fills it right up. At speed, and at high temps and flow rates I can imagine the pressure is simply too great for the cap to hold it in. What I don't get is why you don't get this with the mech pump - it's doing pretty much the same thing at high rpms. There is something different happening here, for some reason the ewp is pushing coolant into the tank and whatever mechanism prevents that from happening isn't working.

i thort it was noo.

do yu have the mech pump as well?

contact Davies Craig

jamesmartin said:

has head been overheated before and how bad ,

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Yes and very badly, had it skimmed when I did the HG and seemed ok. Even with the knackered HG before I did the job the mechanical pump didn't do this - though it did start to get backed up due to exhaust gasses. However I don't think that gas is the cause this time as it doesn't airlock all the time - only the once today after I topped up the coolant. Coolant loss from the cap due to overfilling is what's the problem, I think.

The Mad Hat Man said:

i thort it was noo.

do yu have the mech pump as well?

contact Davies Craig

Click to expand...

Got the old one, we took the impeller off the new one. I will contact MAW solutions where I got it, I think they will have better advice than DC.

overfilling wont be the prob - has to be pressure....

unless

the EWP is causing a low pressure area behind the pump and that is allowing it to overheat.

The Mad Hat Man said:

overfilling wont be the prob - has to be pressure....

unless

the EWP is causing a low pressure area behind the pump and that is allowing it to overheat.

Click to expand...

Possible, but it's been 100% mint until today and the only conclusion I can draw is that topping up the level caused an airlock - like what happened a few times before.

do yu bleed it proppa? bleed nipple by jiggle valve if i remembers....?

The Mad Hat Man said:

do yu bleed it proppa? bleed nipple by jiggle valve if i remembers....?

Click to expand...

Yep, me and DD were most fastidious in that respect. It's like is suffering organ rejection or summat . I know its losing a great deal of coolant out the cap, the first time we fired the EWP up we were a bit freaked out at how the tank just filled up so quick. Could it be that there's some obstruction that is causing the coolant to choose the path of least resistance? From the coolant rail you've got feeds to the injun, header tank and heater matrix - more of it should be going there and not into the tank!!

a very overheated head will often move again ,how ever well you skim it ,no amount of ewp will alter that ,std system is enough with a good head and mls gasket

could be - but wot? thermostat?

speak to davies craig. they mite be able to help..

wheres Hippoo when yu need him - or NI?

op2:

The Mad Hat Man said:

wheres Hippoo when yu need him - or NI?

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Most likely broke down or out fixin the thing .

jamesmartin said:

std system is enough with a good head and mls gasket

Click to expand...

thats been proved wrong many times, James. Better, but not Gaylander proof

jamesmartin said:

a very overheated head will often move again ,how ever well you skim it ,no amount of ewp will alter that ,std system is enough with a good head and mls gasket

Click to expand...

The reason I fitted the EWP was mainly an effort to combat the effects of heat soak. And the std system with MLS didn't stop it getting HGF before I did all the work to it . Mind you they did a super **** job on it.

Could be that the EWP is achieving flow rates that are simply waaaay in excess of what you'd get with the mech pump even at 4k RPM on the belt. Even at it's slowest speed (any slower and it simply pulses on and off) the ewp still pushes a huge amount of coolant around.

jamesmartin said:

a very overheated head will often move again ,how ever well you skim it ,no amount of ewp will alter that ,std system is enough with a good head and mls gasket

Click to expand...

It's only been driven four or five times!

and yu checked liner heights if i 'member?

WLJayne said:

The reason I fitted the EWP was mainly an effort to combat the effects of heat soak. And the std system with MLS didn't stop it getting HGF before I did all the work to it . Mind you they did a super **** job on it.

Could be that the EWP is achieving flow rates that are simply waaaay in excess of what you'd get with the mech pump even at 4k RPM on the belt. Even at it's slowest speed (any slower and it simply pulses on and off) the ewp still pushes a huge amount of coolant around.

Click to expand...

It forces it in even when it's not running (the engine)

Ok, you guys that know far more about injuns in general can help me here. What exactly is the purpose of the main feed hose coming from the header tank? As far as I know it's so you can find a pressure equillibrium and pour in coolant right? So would it really hurt the system to put some sort of flow restrictor in it? There's just way to much coolant being shoved up it.

Possible?