Copper Gaskets

[wardy18 33 1 Cars]

Whats the thinnest Copper Gasket you can get in 84mm bore for the 1900 8v and where from?!

 

Am i right in thinking the std gasket when torqued down is 1.2mm thick?!

 

Many Thanx

 

Simon

[DrSarty 90 1 Cars]

Don't know the answer to your question Simon, but I ONLY advise using a Cu gasket if you're 100% sure your liner protrusion is correct and bang on even.

 

You need to get a good 'bite' into a Cu gasket otherwise it'll blow early and you'll have to take the whole thing apart again. Mine lasted about 3months.

 

The thinner you go, the more critical this is going to become.

[wardy18 33 1 Cars]

Oh right, thanx for the advice!!

 

I cant skim a great off the new head as i want to save it for a future new block (ill tell soon) but this means ill have rubbish CR on the current Ally 1900 block so need to gain as much as possible and as this is my only variable at the time this is all i have to play with.

 

hope that makes sense

[welshpug 1,657]

do they do anything that a normal gasket doesn't?

[wardy18 33 1 Cars]

i just simply need thinner to raise CR

[mickie 3]

could you not get a multi layer gasket made up ? it'll be stronger than copper, the one i have is 0.80mm

[Daviewonder 533 3 Cars]

sorry to sidetrack a little here but I was under the impression that its not a good idea to use copper headgaskets with ally engines as it causes a chemical reaction and eats away at the ally. Has anyone else heard this?

[petert 586]

You can get them in 0.5, 0.7 and 1.0mm from www.ridgecrest.com.au.

 

Corrosion is fine provided you run coolant and rebuild after 3 years.

 

As DrSarty said however, if you haven't got good liner protrusion it will fail (0.003"). To seal properly, blocks and/or heads are usually o-ringed when using a copper gasket. However, a wet liner protrudes above the deck, biting nicely into the soft copper.