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Author Topic: Think I'm in a hard water area  (Read 6120 times)

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Markjay

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Re: Think I'm in a hard water area
« Reply #15 on: 04 September 2006, 23:37:40 »

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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Markjay

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Re: Think I'm in a hard water area
« Reply #16 on: 04 September 2006, 23:44:07 »

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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Markjay

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Re: Think I'm in a hard water area
« Reply #17 on: 04 September 2006, 23:44:47 »

Either way, pure water is BAD news for alloy heads...

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Andy B

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Re: Think I'm in a hard water area
« Reply #18 on: 05 September 2006, 07:22:40 »

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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Markjay

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Re: Think I'm in a hard water area
« Reply #19 on: 05 September 2006, 08:03:39 »

...or use bottled (Mineral) water, with low calcium contents... Seriously.
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TheBoy

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Re: Think I'm in a hard water area
« Reply #20 on: 05 September 2006, 08:18:53 »

I use what comes out of the water butt...
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Andy B

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Re: Think I'm in a hard water area
« Reply #21 on: 05 September 2006, 08:22:02 »

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I use what comes out of the water butt...
:-/  :-/  :-/  ;)
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CaptainZok

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Re: Think I'm in a hard water area
« Reply #22 on: 05 September 2006, 08:56:04 »

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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Big Rod

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Re: Think I'm in a hard water area
« Reply #23 on: 05 September 2006, 09:56:46 »

So what's an HBV?  :-[

I assume it's a valve of some sort.
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nixoro

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Re: Think I'm in a hard water area
« Reply #24 on: 05 September 2006, 10:04:17 »

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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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Big Rod

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Re: Think I'm in a hard water area
« Reply #25 on: 05 September 2006, 10:05:03 »

Check! Thanks!
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Kev

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Re: Think I'm in a hard water area
« Reply #26 on: 05 September 2006, 11:59:26 »

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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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TheBoy

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Re: Think I'm in a hard water area
« Reply #27 on: 05 September 2006, 12:48:43 »

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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CaptainZok

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Re: Think I'm in a hard water area
« Reply #28 on: 05 September 2006, 12:57:20 »

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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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Re: Think I'm in a hard water area
« Reply #29 on: 05 September 2006, 13:35:52 »

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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