DopdBrd

iTrader: (25)

So I got some copper gaskets that will hopefully fix my leaky Percy's, but which way do they go in? They have the embossed ring around each port, but does the flat part go up against the header or the head?

ss.slp.ls1

iTrader: (36)

That's a good question. I have copper gaskets as well, I really don't remember which way I put it on, but no leaks whatsoever.

RamAir95TA

iTrader: (2)

I'd put it toward the engine...

ss.slp.ls1

iTrader: (36)

I honestly think that's what I did. Because I wasn't sure if the primary opening would seal on the raised ring of the gasket, but I knew it would seal on a flush surface like the head.

the_merv

iTrader: (88)

I put the raised part toward the Header, I've never had a problem.

Formula350

iTrader: (3)

I'd also put the raised toward the header, it's the only thing that makes sense. The heads are not perfectly flat of course, but they're much more so than the headers, unless you've purchased some quality ones that are CNCed flat.

RamAir95TA

iTrader: (2)

The correct term you're looking for is "milled," not CNC.

The cylinder head flange has a much better chance of being straight and true than certain headers.

Formula350

iTrader: (3)

Yes and no. There's manual and computer (CNC) mills. Now the Yes part is that Computer Numerical Control doesn't do the work, the mill does, and thus the header would be milled.

Sorry for assuming folks could make the connection :\

RamAir95TA

iTrader: (2)

Did you Google that all by yourself?

Formula350

iTrader: (3)

Nope, I'm a big boy and learned it before our discussion! ^_^

DopdBrd

iTrader: (25)

Ok well guess what they still ******* leaked. THen I thought what the hell and put my used Felpros back in....******* sealed right up.

I will never again use another gasket besides felpro. Endostory

Formula350

iTrader: (3)

This just reminded me (which you're welcome to call BS on, but is the truth) that my friend had told me long ago when I was working at the parts store that the copper gaskets suck *** lol Hell, for cast iron heads and factory manifolds he doesn't even bother to use a gasket and yet they don't leak! Mind you this is GM V8s, doubtful it'd carry over to another manufacturer.