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Author Topic: What is this leaking pipe?  (Read 2453 times)

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Bumbazor

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What is this leaking pipe?
« on: 22 August 2009, 12:48:55 »
So I've replaced the hbv, oil cooler, and checked the pipework in the engine bay in an effort to find the source of my coolant loss.

Today I found it coming out of the pipe in the picture below. It is on the nearside, coming out of the bulkhead just above the auto gear selector. The pipe emerges through the bulkhead and into the open, and descends down about 6 inches where it is clipped into place. The end is open. The coolant also comes out of a similar location on the offside but there is no pipe, just a hole.




This started a few months ago and I had already replace the hbv and oil cooler but I am really stuck now. What are these open pipes? Why would coolant be coming out of them?

Thanks
« Last Edit: 22 August 2009, 12:49:37 by Bumbazor »
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

Andy H

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Re: What is this leaking pipe?
« Reply #1 on: 22 August 2009, 12:55:42 »
I can't make out the pipe in your photo but...

The a/c evaporator in the cabin has a drain which drips clean(ish) water when the cooling system is working.

If the heater matrix had a leak I assume that it would drip out of the same drain.
« Last Edit: 22 August 2009, 12:56:10 by andyh »
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Bumbazor

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Re: What is this leaking pipe?
« Reply #2 on: 22 August 2009, 12:57:50 »
Cocks.

It would that wouldn't it. About the only othe rthing it could be!
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

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Re: What is this leaking pipe?
« Reply #3 on: 22 August 2009, 12:58:53 »
That is not a very clear photo,but it does look like the drain for the aircon evaporator, so if you have coolant leaking from there then your problem is under the dash in the heater matrix. Hope not though. :(
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Bumbazor

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Re: What is this leaking pipe?
« Reply #4 on: 22 August 2009, 13:33:33 »
Yeha I think its the heater matrix. It's more than a drip of ac evap and its a steady drip when the cc is on. Theres also a puddle under the car after about 10 mins.
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

Andy H

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Re: What is this leaking pipe?
« Reply #5 on: 22 August 2009, 14:45:16 »
I changed the heater matrix on my Carlton (Omega A) (no A/C). On that car the matrix slides out into the drivers footwell once the coolant pipes have been disconnected (held by a single nut & retaining plate). It would have been relatively easy if my car had been an auto and the clutch pedal hadn't been in the way ::)

I think GM stuck to a similar design for the Omega B in which case you are looking at the price of a heater matrix, two new o rings for the coolant pipes and a morning standing on your head in the drivers footwell.
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Bumbazor

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Re: What is this leaking pipe?
« Reply #6 on: 22 August 2009, 14:59:28 »
Ok, as long as it's not leaking inside the car it shouldn't be too bad.
What sort of price is a new heater matrix?
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

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Re: What is this leaking pipe?
« Reply #7 on: 22 August 2009, 18:06:42 »
Are you sure that what is leaking out is coolant and not the dye that is put in the air con system to show up leaks.? :-?
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Bumbazor

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Re: What is this leaking pipe?
« Reply #8 on: 22 August 2009, 18:36:22 »
Yes. My air con is chillingly effective and by now would have run dry if the amount of water coming out of that pipe so far was the air con refrigerant/dye.

This has been leaking for months so I would expect no cold air con if it was that, and my coolant level drops so I think it's obvious its coolant.
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

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Re: What is this leaking pipe?
« Reply #9 on: 24 August 2009, 10:12:36 »
I can't find the link that describes how to remove the heater matrix by cutting into things. Can someone point me towards it please?
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

humbucker

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Re: What is this leaking pipe?
« Reply #10 on: 24 August 2009, 11:36:37 »
heater matrix from stealer is about 130 quid. try unflushing yours using a hose pipe if you can reach the in and out plugs into the bulkhead. proper job of removing matrix and replacing without cutting into dash means removing the whole dash. i had no choice but to take mine to the dealers to do at the time. set me back 700 quid plus vat for part and fitting, and even then they undercharged me by 50 percent as they didnt anticipate just how long it was going to take...
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Bumbazor

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Re: What is this leaking pipe?
« Reply #11 on: 24 August 2009, 11:48:04 »
I found the link and if I have to change the matrix I will be cutting the dash as neatly as possible.  I will first flush but I am almost certain my matrix is buggered.
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

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Re: What is this leaking pipe?
« Reply #12 on: 24 August 2009, 11:55:45 »
matrix would usually leak inside the cabin, or in many instances (including mine) burst if blocked, causing boiling coolant to pi55 all over your driver's feet.

is your coolant the nice red stuff? put some white kitchen roll under the car, weigh it down, and allow the drip to fall onto the kitchen roll. you will see the colour of the offending liquid then, will know if it's coolant or not.
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Bumbazor

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Re: What is this leaking pipe?
« Reply #13 on: 24 August 2009, 12:09:37 »
Pretty sure it's coolant; there's just too much to be condensation or ac refrigerant.
Going to try the colour test though...

I know what you mean about the matrix leaking in the cabin but it's not, so it is slightly confusing as my coolant level drops, and 'something' drips out of those pipes as it does...
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To do: Replace brake discs and pads; adjust already replaced shoes; check for leaks in oil cooler, cambelt area, crank seals, sump, dipstick; replace osf door; replace a tyre; clean, MOT.

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Re: What is this leaking pipe?
« Reply #14 on: 24 August 2009, 12:44:45 »
Is the liquid thats coming out sweet to the taste?

You do get a lot of condensate from an effective aircon setup!
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