Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: CaptainZok on 04 September 2006, 21:04:59
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Just changed the HBV after a prolonged leak, I thought it was kettles that suffered from limescale not Omegas.
(http://i107.photobucket.com/albums/m302/CaptainZok/09040003.jpg)
(http://i107.photobucket.com/albums/m302/CaptainZok/001fb7e9.jpg)
(http://i107.photobucket.com/albums/m302/CaptainZok/a8905011.jpg)
Spot the difference.
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Yep, the one on the left looks to be performing outwith specification. :o
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Are you sure you haven't got a seagull hiding under the bonnet ;D
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Blimey that looks cream crackered! :o
Sure someone aint took a dump in there? ;D
What was your water anti-freeze mixture like?
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Are you sure you haven't got a seagull hiding under the bonnet ;D
LMAO
At least I didn't have to change it myself. I got me an apprentice now.
(http://i107.photobucket.com/albums/m302/CaptainZok/c8e96891.jpg)
Cheeky swine wants payin VX rates for changing it for me now.
Gotta be a forum member in the making 12 years old and better than a VX fitter already.
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Has the car previously had an oil cooler failure?
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Blimey that looks cream crackered! :o
Sure someone aint took a dump in there? ;D
What was your water anti-freeze mixture like?
100% H2O
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Blimey that looks cream crackered! :o
Sure someone aint took a dump in there? ;D
What was your water anti-freeze mixture like?
100% H2O
I hope its got 50% antifreeze....
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Has the car previously had an oil cooler failure?
Not that I'm aware of just me not knowing where the leak was for a while.
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nice one. Put him to work... Remember bribe him.... the possibilty of an iPod for christmas maybe? PS3? ;D
Then saw we cannot afford it and tempt him with the same stuff on his Birthday! ;D ;D
Can he reach the DIS with just the plenum off?
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I think I would flush the cooling system judging by the amount of limescale in the pic
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Blimey that looks cream crackered! :o
Sure someone aint took a dump in there? ;D
What was your water anti-freeze mixture like?
100% H2O
I hope its got 50% antifreeze....
Just water? :o - I'd get some anti-freeze in that quick, can't be doing the HG any good.
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Just water? :o - I'd get some anti-freeze in that quick, can't be doing the HG any good.
What effect does the mix have on the HG?
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Just water? :o - I'd get some anti-freeze in that quick, can't be doing the HG any good.
What effect does the mix have on the HG?
To be honest? No idea.
But i remember looking for project cars, and saw one that had a 'true HG fail' - laidback66 commented that i could be run on just water on the way back.
But for the HG to fail, the coolant system had to have been running on pure water for a long time. So i guess its not good. I assume the water freezing would't help....
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Just water? :o - I'd get some anti-freeze in that quick, can't be doing the HG any good.
What effect does the mix have on the HG?
On the HG itself - none. But the water is corrosive and will corrode alloy around the waterways in the head creating tiny cavities until the water meets an oil duct or just jumps the HG and goes straight into the cylinder. If you remove the head you will find the HG intact, but the mating surfaces on top of it will have a porous appearance. If not too bad, this can be fixed by skimming the head until level and then using a thicker HG (in order to not increase the compression ratio).
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When the actual HG fails, it is usally a result of overheating, not corrosion. The corrosion generates the same symptoms as HG failure, because the cylinder head is leaking, but the actual failure is in the alloy on top of the HG, not the HG itself.
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When the HG fails because of alloy corrosion, you will almost certainly have coolant lose as coolant will be entering the cylinder. However a 'true' HG failure may happen at any narrow point around the HG, so you may or may not have coolant lose. For example the failure can occur between two adjacent cylinders, in which case you will have compression lose but no coolant lose.
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Either way, pure water is BAD news for alloy heads...
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You'll have to take a drive to BL8 for a bucket or 2 of nice soft water. It's soft enough here to put straight in a battery! ;)
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...or use bottled (Mineral) water, with low calcium contents... Seriously.
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I use what comes out of the water butt...
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I use what comes out of the water butt...
:-/ :-/ :-/ ;)
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Andy has a point there guys. Bolton water is very soft, as he says soft enough to use for battery electrolyte, so WTF is all that brown crud? Could it be the remains of a leak stop someone has used to try to fix the leaking HBV?
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So what's an HBV? :-[
I assume it's a valve of some sort.
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So what's an HBV? :-[
I assume it's a valve of some sort.
HBV is the Heater Bypass Valve
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Check! Thanks!
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Check! Thanks!
Common fault apparently. Worth noting in case you ever have a coolant leak, one of the first places to check. ;)
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Aye, not uncommon for the HBV to fail. All A/C cars (inc ECC) have them, but I've only seen fail on ECC cars. Not sure why...
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Aye, not uncommon for the HBV to fail. All A/C cars (inc ECC) have them, but I've only seen fail on ECC cars. Not sure why...
This is only A/C not an ECC model so it looks like it can happen to both.
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Same part, so only stands to reason it can fail on both. Just for some reason, I've never seen it...
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Same part, so only stands to reason it can fail on both. Just for some reason, I've never seen it...
Perhaps the HBV is operated more frequently on a car with ECC, as the ECC attempts to maintain the set cabin temperature.
Just a guess. ::)
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Wondered if it would be that as the ECC will be operating it much more frequently...