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#180
by
jtanguay
on 30 Jan, 2007 08:04
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i wonder about their re-useableness... could probably re-use it once or twice...
maybe the copper hg would need to be a little thicker as well, due to the fact that it 'squishes' a little bit.. maybe 0.5mm max?
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#181
by
SMOKEYDUB
on 30 Jan, 2007 08:58
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i heard they could be re used but i would kind of hesitate on reusing it on a high boost diesel.
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#182
by
jtanguay
on 30 Jan, 2007 12:03
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i heard they could be re used but i would kind of hesitate on reusing it on a high boost diesel.
i wonder why exactly copper gaskets must be replaced... maybe there is a way of 'shaving' or even just scuffing/sanding the surface to make it seal good again?
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#183
by
Benjamin
on 30 Jan, 2007 13:07
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if you wanna re-use a copper headgasket, you need to heat it up, just like you have to do with copper O-rings. i should always remeasure the tickness from the gasket before you put it on again (always measure after heating it).
with tick (3mm or so) headgaskets there are sometimes problems, they can leak sometimes. (well, thats my knowledge about copper headgaskets on gassers, but i never had one installed myself)
Greetz, Benjamin
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#184
by
jtanguay
on 30 Jan, 2007 13:24
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heating it up isn't so bad... worth it imo... i honestly cannot see copper leaking... unless there was large enough gouges on the gasket itself to cause a leak...
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#185
by
SMOKEYDUB
on 01 Feb, 2007 11:03
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anyone find a place yet get oringing done?Prices?
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#186
by
Benjamin
on 01 Feb, 2007 14:50
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anyone find a place yet get oringing done?Prices?
in Belgium there is 1 producer for copper headgaskets, i called with them and they ask 125EUR. you have to send an original to them, they send you back the two gaskets.
http://www.cojoint.com/en/home.php?page=this one is definitly cheaper
http://www.headgasket.com/products.htmlthere is also a other metal headgasket solution, but i dont know the right name in english :cry:
Greetz, Benjamin
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#187
by
SMOKEYDUB
on 03 Feb, 2007 10:47
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well i think a good way to go if you want to make power with out problems is just straight out change the head stud size to 13mm. Clearly there isnt enough clamping force so change it to 13mm. I have 12 mm arp studs right now and just cant seem to hold that thing down.
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#188
by
wyldman
on 03 Feb, 2007 13:41
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Copper is not the way to go for a daily driver.They will seep and leak like crazy during warmup\cooldown.Been down that road with the Cummins.
O-rings are the way to go.You need to find a shop who can machine the head,and find a source of o-rings.They will be good to 50-60 PSI if you can keep the clamp load tight enough.
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#189
by
jtanguay
on 03 Feb, 2007 15:13
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Copper is not the way to go for a daily driver.They will seep and leak like crazy during warmup\cooldown.Been down that road with the Cummins.
O-rings are the way to go.You need to find a shop who can machine the head,and find a source of o-rings.They will be good to 50-60 PSI if you can keep the clamp load tight enough.
hmmm good to get some first hand experience with the copper hg... wish there was an aftermarket cast iron head available... no more issues
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#190
by
foxracer1
on 03 Feb, 2007 15:48
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The cummins doesn't have an aluminum head, and they do hold up well to lots of boost. But the weight savings on the little cars is probably worth more.
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#191
by
wyldman
on 03 Feb, 2007 15:57
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Yes,the cummins is an iron head.
I can only imagine the copper headgasket problems would be worse with an aluminum head,due to the different expansin and contraction rates of the two different metals.
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#192
by
jtanguay
on 03 Feb, 2007 17:08
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well then just freeze the copper hg and the head and then torque them down asap while cold... this should give a really good seal! if the studs can hold it down with enough clamping force there shouldn't be a problem.
maybe bigger head studs is the way to go? wasn't there a guy running 60 psi boost and producing major hp in a vw caddy???
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#193
by
andy2
on 03 Feb, 2007 17:27
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I don't think the head studs are the problem its just that the stock HG doesn't have enough crush around the fire ring for high HP.I've got the block out ready for machining the grooves.The cyl head will be left alone in this case.I may put rubber o rings into the gasket for the oil pressure ports to ensure a good seal there.I'm not sure what rad cap pressure the OEM rad cap holds but the experts say to use an 8 lb cap to hopefully help with coolant sealing issues.Still kind of up in the air about The actual gasket and o rings themselves.QuickTd is looking into the copper end of it and We are in touch with some other place too.The PD 100 rods are holding up good anyways :twisted:.
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#194
by
andy2
on 03 Feb, 2007 17:29
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