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[cem_devecioglu]

I need some help please

My car is magically losing coolant somewhere. I got under  the car and saw the engine was wet at back around the clutch, so I thought maybe it's HBV.
But when I did the pressure test, no coolant leaked anywhere, and pressure stayed in the engine, like there was no leak at all. It's still losing coolant.
There is no oil or petrol in the header tank, only clean coolant.
Could this still be the HBV?

Thank you!

it sometimes only leaks when on/off. 

yep.. and unfortunately reservoir cap is a sneaky leak area.. stop the car on a silent place( and no one around) and listen to it   (so people wont think you are mad)
 
other candidates
oil cooler area
thermostat
radiator hoses and corners
behind the engine
and finally the oscar goes to head gaskets
 
ps: you can use color dyes to find also

and must add heater matrix..  I'm afraid you need to check those points..  starting from the easiest..
 
also you can add color dyes..
 
ps: in a dark place the coolant loss will be shiny under black light..

[symes]

when you pressure test-engine cold - when hot metal expands so could be bridge under inlet manifold - my saloon had that problem,but check HBV first

[feeutfo]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in the dark in a fluorescent style with goggles, like air con die?

If a liquid is visible, how does it matter what colour it is? Especialy as it likely already has, for example, a red colour to it already?

Having traced quite a few coolent leaks on omegas, as most owners will have to at some point let's face it, I've never once thought "that job would have been easier if the coolent had a colour to it."  ...or even a different colour, for that matter.

[steve6367]

I wouldn't rule out HBV - just changed mine on 2.2 based on where water was dripping under car. I could see it leaking while installed (despite trying AC hot / cold test) but once out it was clear by white staining it had been and the change has fixed my problem.

Steve

[kluku5]

Thank you all for your posts

Before I do anything, let me ask you this:
I found another leak from on top of the radiator, on the right, a crack in the plastick. The place with a lot of glue .


I couldn't stop it, so should I get a new rad from somewhere?

Now the question I meant before: To my sad discovery I found the bottom seal on my windscreen is not glued at all, and the padding under the scuttle was like a sponge. So could it be that, when raining, the water goes under the seal into the padding, and runs down the back of the engine, onto the bellhousing?


The sponge:


Oh, my car is year 2000
And the usual Thank you, I would probably be bald by now if there weren't this forum

[cem_devecioglu]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in the dark in a fluorescent style with goggles, like air con die?

If a liquid is visible, how does it matter what colour it is? Especialy as it likely already has, for example, a red colour to it already?

Having traced quite a few coolent leaks on omegas, as most owners will have to at some point let's face it, I've never once thought "that job would have been easier if the coolent had a colour to it."  ...or even a different colour, for that matter.

if you add a dye no need for anything you can see with naked eye in daylight.. and for your information not everyone uses red VX
 
"Most commercial antifreeze formulations include corrosion inhibiting compounds, and a colored dye (commonly a green, red, orange, yellow, or blue fluorescent) to aid in identification"
 
http://en.wikipedia.org/wiki/Antifreeze

[cem_devecioglu]

Thank you all for your posts

Before I do anything, let me ask you this:
I found another leak from on top of the radiator, on the right, a crack in the plastick. The place with a lot of glue .


I couldn't stop it, so should I get a new rad from somewhere?

Now the question I meant before: To my sad discovery I found the bottom seal on my windscreen is not glued at all, and the padding under the scuttle was like a sponge. So could it be that, when raining, the water goes under the seal into the padding, and runs down the back of the engine, onto the bellhousing?


The sponge:


Oh, my car is year 2000
And the usual Thank you, I would probably be bald by now if there weren't this forum

kluku my personel experience tells me that once omegas start to leak coolant its likely to be more than one point as the car is old.. my car was leaking from heater matrix, oil cooler, hbv,coolant reservoir cap areas when I bought it (it was 7 years old at that time) and finally it topped the list with head gasket last year..  if you ask my opinion before chucking money try to be sure from leak points as much as posssible..   
 
and must add also.. never ignore head gasket possibility, many owners rarely change coolant which becomes acidic and eats head gasket.. although in compression tests it may not show (fire rings may be ok) its a possibility..

[cem_devecioglu]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in

and apologies but why it bothers you ?

[feeutfo]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in

and apologies but why it bothers you ?

because it already has a colour dye in it...?

And even if it didn't have a colour, how does the colour help?

[cem_devecioglu]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in

and apologies but why it bothers you ?

because it already has a colour dye in it...?

And even if it didn't have a colour, how does the colour help?

these may give enough idea I think
http://answers.yahoo.com/question/index?qid=20080805003803AAx7OHB
http://www.kenteurope.com/uk/datasheets/84237.pdf
http://www.discoweb.org/forums/showthread.php?t=3447
 
they are sold seperately as seen
http://www.amazon.com/UView-B483906-Radiator-Coolant-Dye/dp/B0019CLI1I
 
why ?
 
 
 

[feeutfo]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in

and apologies but why it bothers you ?

because it already has a colour dye in it...?

And even if it didn't have a colour, how does the colour help?

these may give enough idea I think
http://answers.yahoo.com/question/index?qid=20080805003803AAx7OHB
http://www.kenteurope.com/uk/datasheets/84237.pdf
http://www.discoweb.org/forums/showthread.php?t=3447
 
they are sold seperately as seen
http://www.amazon.com/UView-B483906-Radiator-Coolant-Dye/dp/B0019CLI1I
 
why ?
 
 
 

As said previously, I could possibly understand the uv dies. And, as said, the colour already exists in the coolent anyway, as you've just posted.

So how does the colour of the liquid help anyone to see a liquid? It's wet. This alOne stands out in a normally dry engine bay.
 Now if the engine was already wet, for god knows what reason, that would make perfect sense, to separate the coolent die from the wet engine.

But as the omega engine does not reside in a boat normally, although some might argue it should and would be dry unless there is a leak, I can't see how the extra expense of a dye in the coolent helps I.D a leak source.

The basic identification of water, or any liquid being a liquid does, not rely on the presence of a colour. Especially in a dry engine bay where no other liquid is, or should be present.

I would concede the uv idea, but only if in a dark unlit area such as the back of a condenser.

Waiste of time and money on a coolent leak.

[cem_devecioglu]

...and my applologies but this bothers me a little, but how does adding a dye to the coolent help? Unless it glows in

and apologies but why it bothers you ?

because it already has a colour dye in it...?

And even if it didn't have a colour, how does the colour help?

these may give enough idea I think
http://answers.yahoo.com/question/index?qid=20080805003803AAx7OHB
http://www.kenteurope.com/uk/datasheets/84237.pdf
http://www.discoweb.org/forums/showthread.php?t=3447
 
they are sold seperately as seen
http://www.amazon.com/UView-B483906-Radiator-Coolant-Dye/dp/B0019CLI1I
 
why ?
 
 
 

As said previously, I could possibly understand the uv dies. And, as said, the colour already exists in the coolent anyway, as you've just posted.

So how does the colour of the liquid help anyone to see a liquid? It's wet. 1.This alOne stands out in a normally dry engine bay.
Now if the engine was already wet, for god knows what reason, that would make perfect sense, to separate the coolent die from the wet engine.

But as the omega engine does not reside in a boat normally, although some might argue it should and would be dry unless there is a leak, I can't see how the extra expense of a dye in the coolent helps I.D a leak source.

The basic identification of water, or any liquid being a liquid does, not rely on the presence of a colour. Especially in a dry engine bay where no other liquid is, or should be present.

I would concede the uv idea, but only if in a dark unlit area such as the back of a condenser.

2.Waiste of time and money on a coolent leak.

1.your assumption of wet depends on the amount of flow.. if its like a River    and if the coolant not finished yet you may be able to see it..  but if that was the general case those coolant dyes would have the customer potential to be none which is obviously not the case.. (and most cases)..
 
2. Time and money spend to solve coolant leaks is not a waste as you know already.. besides you also already know what consequences a coolant leak may bring .. otherwise this kind of thread wont frequently be seen in general help section

[feeutfo]

1 sorry don't understand your reply.
2 messing about with dye is not finding a coolant leak. It's waisting time and money messing around with dye for no gain what so ever. Especially as its IN THE COOLANT ALREADY.

[cem_devecioglu]

1 sorry don't understand your reply.
2 messing about with dye is not finding a coolant leak. It's waisting time and money messing around with dye for no gain what so ever. Especially as its IN THE COOLANT ALREADY.

ok then why those people cant find the leak if its so visible ?

[feeutfo]

1 sorry don't understand your reply.
2 messing about with dye is not finding a coolant leak. It's waisting time and money messing around with dye for no gain what so ever. Especially as its IN THE COOLANT ALREADY.

ok then why those people cant find the leak if its so visible ?

cem, pull the other one. Your not that stupid.

Iirc, the op may well have the plenum, inlet and wedge obstructing the view. No amount of colour will change that.... For example.

Colour won't help him to look at the radiator either.