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Location: Adelaide
Registered: June 2003
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Copper H.G.
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Tue, 28 September 2004 12:06
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Hi just wanted to know what everyone thinks of copper head gaskets. are they any better or worst then metal ones. if i do get one i will be putting it on a 7mgte.thanks
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Location: Canberra
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 13:15

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Are you planning to o-ring the head?
I would strongly recommend that you do. Some would advise a receiver groove in the block also.
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Location: Brisbane CBD
Registered: September 2004
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Re: Copper H.G.
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Tue, 28 September 2004 13:17

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Thats an intersting point do u think a recever grove is needed nor easly able to be seated into as im looking to get a copper hg for a 1g
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Registered: July 2002
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Re: Copper H.G.
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Tue, 28 September 2004 13:22

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i purchased a greeedy metal head gasket to suit my 7m from perfect run , heaps cheaper than the hks , and a lot beter in terms of corrosion.
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Location: Canberra
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 13:36

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There's arguments for and against a receiver groove. Some say its better to have the groove for the copper to 'bulge' into from the ring pressing on the other side (to help sealing), others will argue that the block & head expand at different rates (being cast iron vs aluminium) which can cause dramas with the alignment of the receiver groove. Unfortunately I can't give a definative answer as I have not tried both ways first hand
Speak to a few engine builders in your area, i'm sure they'll each have a story to tell as to which is best.
I personally like the idea of a TRD/HKS etc multi-layer metal gasket and/or headstuds rather than copper gaskets.
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Location: Brisbane CBD
Registered: September 2004
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Re: Copper H.G.
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Tue, 28 September 2004 16:15

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yeh i was beginning to think mhg too tho with head studs do u know if the 1g had studs to start with cos mine does? stud meaning hex head right? and one more question would you know the approx price for a composite mhg ? compared to the about $88 chg from ridgecrest?
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Club President I supported Toymods
Location: Sydney
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 22:51

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O rings are best fitted to the block NOT the head.
Receiver Grooves have been the topic of come discussion around here lately, It is NOT hard to alling them, any decent engine builder should know what to do there. The reason for them is to stop the Head gasket from "pushing out".
Receiver grooves help when you cannot get enough clamping force in an area of a head, be it due to flex in the head or not being able to get enough clamping force from the head bolts ( This is where Head studs CAN help) The ridge created by te O ring and the Groove helps prevent sideways movement of the copper. You gotta remember that an O ring is a small Guage wire and cuts into the copper reasonably easy.
Hope that helps !
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Location: Brisbane CBD
Registered: September 2004
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Re: Copper H.G.
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Tue, 28 September 2004 23:17

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yeh it does i didnt think the recever grove was neseccary either seeing how soft Cu really is, but in comparison what sort of reliability difference is there in a oringed copper hg compared to the composite metal hg?
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I supported Toymods
Location: Perth
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 23:23

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Well in the case of the 7M, which is plagued by problems from the factory, a good head gasket replacement (where nothing else is wrong) with a factory gasket and proper torque values, causes the problem to basically go away.
If you wanted to go the composite metal head gasket for peace of mind, it'd be a lot less stuffing around than a copper one. A composite metal head gasket is what the JZ engines use from the factory and they have no issues with blowing head gaskets.
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Location: Brisbane CBD
Registered: September 2004
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Re: Copper H.G.
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Tue, 28 September 2004 23:26

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thanx for the quick reply but i think my options are limited so far havent see any 1g hg in hks or greddy sites
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I supported Toymods
Location: Perth
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 23:27

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If this is for a 1G, just get a factory gasket and make sure the surfaces are right and it is installed correctly. You're are unlikely to have any issues at all.
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Toymods Vice President
Location: Sydney
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 23:28

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Ra28Freak wrote on Wed, 29 September 2004 02:15 | yeh i was beginning to think mhg too tho with head studs do u know if the 1g had studs to start with cos mine does? stud meaning hex head right? and one more question would you know the approx price for a composite mhg ? compared to the about $88 chg from ridgecrest?
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If you are talking about the bolts that use a hex key to undo, no they are not studs they're bolts. Head studs are two part, there's the shaft that screws into the block and then a nut that screws down onto the top of the shaft. Of course there's also a washer but that's a given.
I really should be doing work instead of replying to this but I couldn't let a chance to use the word shaft go by.
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Location: Brisbane CBD
Registered: September 2004
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I supported Toymods
Location: Perth
Registered: May 2002
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Re: Copper H.G.
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Tue, 28 September 2004 23:31

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The limit won't be your head gasket, it will be the limit of your tuning.
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Location: Brisbane CBD
Registered: September 2004
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Re: Copper H.G.
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Tue, 28 September 2004 23:32
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lol verry true then i better get a titanum one made
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