very strange water loss probs NOW WITH PRICES advice peeps

[meltonlad]

well ive just been playing with it again and once engine was warm i removed the expansion tank cap at first it was fine then it was like super powered spa bath bulbing away and pooring water all over the the top of the tank.... is this right for it to do this ?

 

[LEE69]

Yes, that's why it as a cap on the bottle

 

[Willie]

You must have heaps of air in your system.
Try draining and refilling and see how it is after this

 

[meltonlad]

ok so if i have got an air lock how would that explain the water loss ?? like i said i got no leaks, no mayo,

 

[Willie]

Water replacing the space the air lock was taking up

 

[dg-1984]

I dont know if this can be done on the LCR rad, I havn't looked where it sits or anything, but on my old 106 gti I was told you can cut the top off a 2litre bottle and use it as a funnel, tape it in place in the rad filler cap fill half up with water then can run the engine, any air should rise out the system and bubble in the funnel.

I dont know if this could help just wanted to post incase it might.

 

[R@B]

it was like super powered spa bath bulbing away

Possible symptom of head gasket and could explain the water loss, you should get it pressure tested.

 

[meltonlad]

but if it was HG probs wouldnt i have mayo on oil cap ?

 

[R@B]

but if it was HG probs wouldnt i have mayo on oil cap ?

Not all the time, it all depends which part of the gasket is away. The seal between the water channel and combustion chamber could be leaking and letting water into to cumbustion chamber(water loss) and vice versa( pressure escaping to water channel which could explain the super powered spa bubbles).
It's not definite but possible, you would need to get it pressure tested.
Is there any steam/white smoke coming from the exhaust?

 

[meltonlad]

no steam or white smoke and it drives perfect. last 2 days done 360 miles used 6 lts of water but still runs like a dream and doing 44mpg...

 

[LEE69]

And you can't see water anywhere?

You checked the oil?

 

[R@B]

no steam or white smoke and it drives perfect. last 2 days done 360 miles used 6 lts of water but still runs like a dream and doing 44mpg...

White smoke would have clarified water getting in to the combustion chamber.
Well i'm stumped for anymore suggestions.

 

[meltonlad]

ive spent ages looking all round engine/pipes and under car no signs of water anywhere. the steam i saw yesturday was coming from the overflow on the expansion tank. fans kick in when they should do. oil still clean.

 

[meltonlad]

Well i'm stumped for anymore suggestions.

your stumped !!!! its doing my head in now and im well

 

[Willie]

No sign of wet or damp carpets?
Perhaps your heater matrix is leaking the water into the car?

 

[LEE69]

Willie if he was loosing 6 litres of water in the car, he could swim home

 

[Willie]

Yup, it's alot of water but where else is it going?
The under floor fire proofing is VERY thick and could easily soak up a few litres of water without knowing.

 

[LEE69]

Nothing else makes sense except it is under the carpets.

 

[meltonlad]

right ive just got a new expansion bottle which i will fit tomorrow. but where the hell is the matrix ??? i have removed the glovebox but still cant find it... i need to try and sort it by monday as im going away for the week...

 

[Willie]

Just a case of tracing the coolant pipe work from the engine bay and see where it goes through the fire wall.
As you can guess, I don't know either, lol