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Author Topic: Leakage  (Read 2138 times)

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polilara

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Leakage
« on: 02 May 2007, 09:36:44 »
Hello from Finland. I drive 2.6.V6 Elegance 2001 model. I have very small leakage somewhere in coolant system lets say 0.5 litres each three months. No leakage can be seen but there is a slight glycol smell when I open the door after drive. Do you have experience of this ?
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kcl

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Re: Leakage
« Reply #1 on: 02 May 2007, 10:27:16 »
It is either the HBV valve or the oill cooler. Mine had a small leakage in one of the pipe fittings in the cooler, had to replace the whole thing (no ttoo cheap), the HBV is affordable and easier to change. Not too many other possibilities. Also sent you a pm in Finnish...  :)
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Markjay

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Re: Leakage
« Reply #2 on: 02 May 2007, 11:36:45 »
Quote
It is either the HBV valve or the oill cooler. Mine had a small leakage in one of the pipe fittings in the cooler, had to replace the whole thing (no ttoo cheap), the HBV is affordable and easier to change. Not too many other possibilities. Also sent you a pm in Finnish...  :)

There is always a chance of a small leak from a hose or from the radiator drain tap, but as said above by far the most likely reasons for having to top-up coolant on the V6 are Heater Bypass Valve and the Oil Cooler.

Also, you need to make sure that you are using Vauxhall/Opel Red Antifreeze (not green) with 50/50 concentration, and that it is replaced often (1-2 years). Officially its is 2 years for the green coolant and 5 years for the red coolant, but go for the red coolant and replace maximum every 2 years. The oil cooler is very sensitive to corrosion, apparently even the newer stainless steel ones..
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Elite Pete

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Re: Leakage
« Reply #3 on: 02 May 2007, 11:40:47 »
I would think it would be the HBV as if it was the oil cooler there would be evidence of oil in the water.
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Markjay

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Re: Leakage
« Reply #4 on: 02 May 2007, 11:48:28 »
Quote
I would think it would be the HBV as if it was the oil cooler there would be evidence of oil in the water.

Makes sense, but when my oil cooler went all I notices was lose of coolant but not oil in header tank... I think it depends on how if fails, it could be just the area around the oil cooler that is leaking i.e. the cover plate etc?
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Elite Pete

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Re: Leakage
« Reply #5 on: 02 May 2007, 11:52:20 »
Quote
Quote
I would think it would be the HBV as if it was the oil cooler there would be evidence of oil in the water.

Makes sense, but when my oil cooler went all I notices was lose of coolant but not oil in header tank... I think it depends on how if fails, it could be just the area around the oil cooler that is leaking i.e. the cover plate etc?
[/highlight]

Yep could be  :y
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Jimbob

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Re: Leakage
« Reply #6 on: 02 May 2007, 11:55:13 »
Count youself lucky, mine is now losing .5 litres every 3 hours!  car running or not!
You can watch it dripping out the bottom, but cannot see where it is coming from :(

Its with a mechanic friend today for this and a few other jobs, here's hoping!
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BrianH

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Re: Leakage
« Reply #7 on: 02 May 2007, 22:17:52 »
Mines the same slight loss of coolent dripping from bottom of gearbox HBV changed last week drips still there really need to post for other ideas but will have to wait untill after MOT in June removed Plenum and inlet bridge to check DIS pack was dry. It was so leak must be lower down in engine.  

Brian
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Markjay

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Re: Leakage
« Reply #8 on: 02 May 2007, 23:08:04 »
Quote
Mines the same slight loss of coolent dripping from bottom of gearbox HBV changed last week drips still there really need to post for other ideas but will have to wait untill after MOT in June removed Plenum and inlet bridge to check DIS pack was dry. It was so leak must be lower down in engine.  

Brian

Did you remove both the inlet manifold (the bit with the injector rail) AND the intake flange underneath it? You could have a leak from the oil cooler cover plate or from the coolant bridge, but you will only be able to check this if you remove the intake flange as well.

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BrianH

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Re: Leakage
« Reply #9 on: 02 May 2007, 23:29:20 »
Hi markjay
I removed injector rail so I could see what looked like coolent bridge (bit with 2 pipes and temp sensor)
but did not want to disturb anything else at that time until I was sure what to check. It looked like I would need gaskets etc and I needed to keep car on road.
Next stage is to go one stage further to expose, I presume thermostat and you mentioned oil cooler.
I have no trace of oil in header tank or gunge in filler cap or on dipstick all pefectly clean. Cars now done 78000 miles on T plate so possible it could be oil cooler is it all visible if you remove plate that you mentioned.

Brian
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Re: Leakage
« Reply #10 on: 03 May 2007, 08:47:16 »
Quote
Hi markjay
I removed injector rail so I could see what looked like coolent bridge (bit with 2 pipes and temp sensor)
but did not want to disturb anything else at that time until I was sure what to check. It looked like I would need gaskets etc and I needed to keep car on road.
Next stage is to go one stage further to expose, I presume thermostat and you mentioned oil cooler.
I have no trace of oil in header tank or gunge in filler cap or on dipstick all pefectly clean. Cars now done 78000 miles on T plate so possible it could be oil cooler is it all visible if you remove plate that you mentioned.

Brian
If you saw the oil cooler plate and the stat housing, and it was dry, it is unlikely you are losing coolant from there...
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BrianH

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Re: Leakage
« Reply #11 on: 03 May 2007, 09:05:57 »
Hi TB

Not sure what its called I presume its inlet manifold (bit with injectors fitted) was the last bit removed.
This left flattish plate with gaskets and bridge visible but could still not see any coolent stains but I think its only leaking when pressurised, does that plate remove easily?

Brian


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TheBoy

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Re: Leakage
« Reply #12 on: 03 May 2007, 09:47:02 »
Quote
Hi TB

Not sure what its called I presume its inlet manifold (bit with injectors fitted) was the last bit removed.
This left flattish plate with gaskets and bridge visible but could still not see any coolent stains but I think its only leaking when pressurised, does that plate remove easily?

Brian


Did you remove the plastic bit below this with about 10 million bolts in? This needs to come off to check if oil cooler cover is leaking...
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BrianH

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Re: Leakage
« Reply #13 on: 03 May 2007, 12:50:50 »
Quote
Quote
Hi TB

Not sure what its called I presume its inlet manifold (bit with injectors fitted) was the last bit removed.
This left flattish plate with gaskets and bridge visible but could still not see any coolent stains but I think its only leaking when pressurised, does that plate remove easily?

Brian


Did you remove the plastic bit below this with about 10 million bolts in? This needs to come off to check if oil cooler cover is leaking...

Guess thats my next job then

Brian
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Markjay

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Re: Leakage
« Reply #14 on: 03 May 2007, 23:43:16 »
This is what you need to remove to gain access to area where the coolant bridge, thermostat, and the oil cooler cover plate are:


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