oil bypass mod.
 

hi pelican parts

I've checked today the Factory technical bulletin tha's been given to Porsche dealers many years ago, about oil bypass mod.

the hole to drill is 3mm diameter according to Porsche specifications.
It seems to be small compared with the pics i've seen on this board....
What do you think about that ?
Many thanks
Philippe

bump:)

Phillipe

Look at http://forums.pelicanparts.com/911-engine-rebuilding-forum/106045-oil-bypass-modification.html

Just get the equiv metric plug (6mm) and a tap for it, Use a dremel to grind the start, then drill with a pistol drill, To tap for the plug you have to shorten the tap and grind some flat on it

HTH

Neven

Hi NevenM

i've checked your thread
Thanks
shall i really drill 12mm diameter ?
the factory bulletin i have says 3 mm:rolleyes:

what does "tap" mean
Philippe

I can't remember what size I used, but 12mm sounds a little big. That's almost 1/2"!! 6mm sounds closer, but I can't remember.

Tap means to install threads so you can screw in a pipe plug.

It means you need one of these:

http://www.mytoolstore.com/wilmar/w4001db.jpg

mytoolstore.com/wilmar/prod042

I have never used this company; just stole their picture. :)

Philippe

Drill the bypass hole about the same diameter as the hole you block , about 6mm. If you are not sure take the case to a machinist with some pictures of it and say block this hole and drill one thru to here. I started with a 3mm drill and then fept increasing until I got to 6mm

HTH
Neven

many thanks
these are good informations, as always ;)
best regards
Philippe