replaced aos still smoking, please help :-)

[barks]

ok,
no oil in bottle,
oil covered engine again?
intake blocked and aos pipe into bottle.

1st checked exact amount of oil in car drained and measured. 7.6l without filter makes it 8.3l so digital guage correct, dipstic incorrect!

oil new so put back in at least for now.
compression test done, 11.5, 11.2, 10.5, 12, 13, 10 should be 11 so ok.

cleaned engine and all pipes again and put back together.

my theory at the mo is that the aos is working properly, however when the vacume is high it should shut to prevent oil being sucked into intake, this isnt happening so the only conclusion is there must be an air leak.. remember the hanibal lecture noise before it smoked,, on checking the aos to pcv pipe i noticed its not a tight fit, i think the seal has shrunk allowing air to be sucked in at high vacume.
ok how does that explain the oil on the engine, well as there was no vacume the rings wernt sealed so creating more crank pressure and pushing the oil past the aos to pcv seal?

so no smoke all way home as i drove it gently and tomorrow new seal and test it....

cheers
barks

[Gelbster]

Barks,
I wonder if someone else 'repaired' the vacuum hoses ? I ask because they are notorious for becoming brittle and cracking -even the oil filler pipe.
It is easy to mis-connect the rats nest of vacuum hoses.
Answering will take a lot of tedious poking around.

[barks]

ok, thanks,

i did check each one and clean all joints, yesterday i did hover around the oil filler flexible bend for a while but what i was feeling i think was the seam in the plastic.

of to work now update later

barks

[barks]

found what i think to be the problem,

i went to fit a new o ring seal to the aos to pcv pipe at the aos end and i relised it should have the same fitting as the top pipe, push hard and it snaps on to form a tight seal.
the whole ring had been broken off previously and so when intake blanked off the oil would come out and when aos connected to intake the diaphram couldnt close at high vacume due to air being sucked in.
new pipe ordered and might as well replace pcv.

treated it to a new set of bosch coils and plugs today then washed it. :-)

cheers barks

[barks]

hi,
just a quick question,
ive just been on the phone to porsche to order the pipe and pcv,

they say it isnt a pcv its just a connection piece?
ive read that the pcv can stick open?

is it a pcv or a connection piece?, anyone know for definate?
its on the end of the long vent line that goes to the aos, connects onto the top o the cam cover passenger side.

cheers
barks

[barks]

ordered the connection piece, vent line and an oil filler seal.

since i cable tied the vent line on tight no smoke since, about 150 mile covered. think thats the issue.

however now have what feels like a missfire but isnt, statred new thread.

i dont normally talk to myself this much but it may help someone.. lol

barks