Porsche 911 1985 Cylinders

[proporsche]

hi Boys..
I have a Q...has anybody done this to theirs cylinders ? I have an option from one machine shop in Germany to cut a groove into a cylinders to use sealing o ring alu. made.Like it was in early 911`s.The alu.ring i was told is self made by this company.
It is for 911 1985 Carrera with 80 000 miles.
I do not know anything about this update so, if anyone would have an idea or done this i would appreciate any hints.?
Do it or not?To be or not to be?
thanx

Ivan

[proporsche]

ops sorry wrong place...

[john walker's workshop]

I've had that done to 1990/1991 cylinders. Trim the top from the outside in until the o-ring fits, and not too deep so you get some crush on the ring. Works fine

[proporsche]

Thanx John -understand but this is for 85 Carrera..
ivan

[emcon5]

What problem is this a solution to?

[proporsche]

Hi Emcon..i was told by the German manufacturer that it prevent future oil leaks under the heads.
I personally never had a problem of oil leaking there.
I am sure John will explain better..since i have never had it done to the engines i have built...

Ivan

[Eagledriver]

I had a problem with leaks there on an 86. I did the mod you refer to and used CE rings like on an SC. Worked fine, but I now believe they are unnecessary.

-Andy

[emcon5]

I am having a hard time picturing where oil would come from that would leak there, and maybe I am missing something, but if you are leaking oil there, I would think you would have bigger problems than that ring would fix.

I guess if your rings were shot, allowing oil from the case above the pistons, or maybe horribly leaking valve guides, or a cracked head oil could leak there.

Is there something else I am missing? Is there some other explanation for having enough oil in the combustion chamber to leak?

[proporsche]

Hi Emcon..sorry i have written is wrong..It keeps the pressure on cyl. so they do not leak under the cylinders..again the best is John to explain;-)

Ivan