O ringed head and copper gasket

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vr4gone
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O ringed head and copper gasket

Post by vr4gone »

Well I took the head off my car because it was using water and I discovered that the head is O ringed, the gasket is solid copper and the engine is running 12 valve pistons. Can someone confirm my observations?

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Are these pistons stronger than normal 8 valve pistons? What comp ratio would I have based on the dishes in the pistons? I know its low because it was gutless off boost.
I have a vrs kit coming but I'm guessing I cant use the head gasket because the head is o ringed. Can I just clean it all up and re install the copper head gasket and torque it down tighter?
fugazi
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Post by fugazi »

Isnt that standard pistons, due to mirrorised valving?
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jk
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Post by jk »

I think copper head gaskets can be reused, but I once built a toyota twin cam turbo that had an o-ringed block, I used a factory head gasket and that seemed to work just fine. I never ran huge boost though so I have no idea if its suitable for big HP applications but I do use a very well respected engine guy for machinig and he never mentioned it being of any concern (he did the o-rings).
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Xentro
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Post by Xentro »

Those don't look like stock Mitsu pistons to me. Don't they all have a number in the middle?
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88 2.0 Black Widebody DOHC evo 6 turbo at 1.7 bar
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redzone
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Post by redzone »

they look like forged copies of stock starion pistons to me... makes sense due to the copper/o-ring job.

get some wurth motor seal for the water galleries on the copper gasket..
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Komeuppance
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Post by Komeuppance »

We use stock head gaskets over here on oringed applications, because they are softer.

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vr4gone
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Post by vr4gone »

So what do factory pistons and factory DASH pistons look like? Do hey have a dish like these? Where can I get this wurth motor seal from?
fugazi
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Post by fugazi »

vr4gone wrote:....Where can I get this wurth motor seal from?
Würth maby? :D

http://www.wurth.com.au/
More dealers on the website!
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vr4gone
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Post by vr4gone »

fugazi wrote:
vr4gone wrote:....Where can I get this wurth motor seal from?
Würth maby? :D

http://www.wurth.com.au/
More dealers on the website!
Image

What I meant was, what exactly is the name of the compound and can I pick it up locally? :D
redzone
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Post by redzone »

i'll check my bottle today for a part number, you will need to find a wurth distributor!

stock head gaskets can be used with o-rings depending on the position of the o-rings.
Fibreglass airdams $370, fibreglass front bumpers $260, reco drag links $165, alloy radiators $925 (unpolished), h/l switch rebuilds $125, all plus freight.
Coxs Automotive (07)54433507 3/5 Service st Maroochydore Q

www.facebook.com/coxsautomotive
www.coxsautomotive.com.au
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jk
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Post by jk »

my o-rings pressed into the metal fire rings on a standard gasket.
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sigmaproject
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Post by sigmaproject »

When I first had my 4g54 O ringed to accept the turbo the shop used a copper gasket and coppercoat.

First turn of the key and water leaked out everywhere. :shock:

Second rebuild he used a RTV silicone and a can of stop leak for good measure. That was 8 years ago and not a drop of water has been spilt since. :D
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