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Thermostat housing gaskets.....AU falcon 

 

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 Post subject: Thermostat housing gaskets.....AU falcon
Posted: Fri Jul 11, 2008 7:52 pm 
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Hey,

So far so good, but am about the replace the thermostat and housing - and I have 2 gaskets. The one that came with the housing is obvious, its for between the top and bottom housings, however I've also got a simple rubber o-ring, that fits in the recess where the thermostat itself sits. Question is, does this rubber o-ring go in first and the thermostat on top of it, or thermostat in first and rubber o ring on top.

Um, I'm waiting for someone knowledgable so I can put it all back together.... :)

Thanks!
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Posted: Fri Jul 11, 2008 8:35 pm 
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Rubber o-ring goes around the thermostat.....
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Posted: Fri Jul 11, 2008 9:09 pm 
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Around the thermostat?

The thermostat sits in the recess. The rubber o ring either goes above it between it and the top housing, or below it, in the recess BEFORE you put the thermostat in?
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Posted: Fri Jul 11, 2008 9:37 pm 
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Nope. It goes around it. Around the lip of the thermostat.
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Posted: Fri Jul 11, 2008 10:19 pm 
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The o-ring has a slot in the inside.

 

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Posted: Fri Jul 11, 2008 10:20 pm 
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Thanks.

Leaked so I replaced it with the paper gasket that came with the housing top, and its now dry as a bone.
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Posted: Fri Jul 11, 2008 10:29 pm 
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relaxed_diplomacy wrote:
The o-ring has a slot in the inside.


Now THATS making sense. I just checked and you're right (of course). Its not exactly bloody obvious (especially by torch light!!!). Had I slotted the thermostat in the slot in the o-ring, I think it would have been alright, but since it wasn't obvious I had it sandwiched between the top of the thermostat and the top housing, which is why it f*cked up.

Now the paper type gasket is in (and its DRY!) I'll leave it, but if it starts leaking I'll put the o-ring in properly.

I'll re-do it in a few months anyway as it was BAD and FILTHY (seems the previous owner doesn't know the meaning of 'maintenance'), and I also need to replace the bottom hose as I couldn't get one today, so I'll make a decision then whether I change the gasket back to the o-ring. I just needed to do something fairly quickly as the moron had straight water in it.

Thanks heaps mate.
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Posted: Fri Jul 11, 2008 10:37 pm 
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You actually need both : The paper gasket and the O-Ring.

Theory used to be you dont (just use the o-ring), however my last 2 cars have leaked without the paper gasket.

Have to go get one tomorrow. Grrr

Just did a thermostat myself 4 weeks ago cause climate control wasnt working
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Posted: Fri Jul 11, 2008 10:42 pm 
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Oh, well since its not leaking so far without the rubber o-ring, will I bother adding it.....if its not leaking, its not leaking.....

Not sure why it would need both - given the rubber o-ring seals between the thermostat and the top housing, and the paper gasket seals instead between top and bottom housing.

Now, it wasn't leaking before I did it, strangely enough with NO gaskets......
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Posted: Fri Jul 11, 2008 10:48 pm 
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:o

The o-ring around the thermostat is designed to stop the water seeping around the replaceable thermostat until it needs to open... you need this.

You also need the gaskets and a liberal dose of aviation cement or at the very least some blue silicon sealer.

 

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Posted: Fri Jul 11, 2008 10:51 pm 
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f**k, so I need to screw around with this again.

Great. Hello midnight.
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Posted: Fri Jul 11, 2008 11:36 pm 
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Ok, all done, black o-ring also installed on thermostat. Its alll together, still no leaks.

Now dinner time!

Thanks to everyone. :D
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Posted: Sat Jul 12, 2008 9:30 am 
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LOL - lok how quick that was!.

Im going to go and get a thermo gasket today I hope.
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Posted: Sat Jul 12, 2008 11:32 am 
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ive never used a paper gasket!
when i asked for one the auto place just gave me the rubber o ring..

ive never had a leak either...

ah well never mind.....
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Posted: Sat Jul 12, 2008 11:45 am 
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Nigel wrote:
LOL - lok how quick that was!.



I know, even I was surprised! :lol:

Doing it at night really sux.
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