Valve guide seals?

[reclino]

Which ones should I put on a 1986 930? Have Colsibro guides and I want them to last.
David

[Flat6pac]

Use the brown ones that come in the top end kit
White ones are too tight and oil doesn't get to the valve guide.
Bruce

[reclino]

The Victor Reinz ones in my engine gasket kit are black. Whats the difference between black and brown? I know the white ones are Teflon.

[reclino]

Brown, black and Porsche seals all seam to be made of viton.

[Flat6pac]

I ve used the same shop in Raleigh for 15 years and years ago they told me to toss the white ones.
I was told the same thing at the German machine shop in Delaware when I lived there.
Bruce

[reclino]

A shop in Raleigh that does Porsche air cooled heads? Which one is that, I am looking for a local shop.
David