How to clean 3.6 cyl graphite gasket?

[axl911]

My 964 3.6 cylinder head has the original graphite gasket that is compressed into and filled the cylinder groove.

Anyone has any idea how to remove this so I can use the newer steel cylinder head?

See picture. The dark band is the graphite gasket. I can scrape it /w the tip of a screw driver but is afraid it will scratch the cylinder.



thanks,
anthony

[john walker's workshop]

you could have someone chuck them up in a lathe and trim it out carefully.

[ChrisBennet]

I used a screwdriver that I ground to make a chisel narrow enough to fit the groove. I dug the tip into the ring and tapped it with a small hammer like I was trying to spin the ring in it's groove. That opened up a crack between the ring and the groove wall; enough that I could carefull pry out the seal in pieces.

The gasket is 3 layers: graphite/aluminum/graphite. I cleaned out the first layer and mistook the middle alumimum layer for the bottom of the groove. Doh!

-Chris

[axl911]

Uh oh. How deep is the gasket and how much do i have to dig?

I've used a small screwdriver to scrape the graphite to aluminum. Continue scraping but it's all aluminum.

How deep is the cylinder groove?



thanks,
anthony

[ChrisBennet]

If you haven't pulled a ring of aluminum out of the groove you have only removed one layer of the 3 layers. See my previous post. It's hard to tell but it looks like you scraped just the top graphite layer off.
-Chris

[axl911]

Thanks to Chris & Walt, I finally got it out! I had to take a chisel and and came into the gasket at 45 degree. See pic. The gasket itself is a bit less than 1mm.

See pictures. Hopefully, this will help someone with their 3.6 rebuild.






---anthony