hosrom_951

I posted this befor and got nowhere, here is the problem:

The IC pipe going from the IC to the Throttle Body has oil on it. Just a small film of oil (on it's exterior) coming from one of the vacuum pipes on the passenger side.

I belive that vacuum pipe comes from the venturi system? I know that two pipes from the venturi go where the banjo bolt is on the IC and one goes to the J-Boot correct?

I looked around carefully with a flashlight, the oil leak is coming from that vacuum hose (on the passenger side of the TB IC pipe) and eventually leaking on the IC pipe.

The car came back from my specialist, doing a camshaft seal replacement, so he cleaned that area and made sure everything is tight (that is what the previous post advised me to do).

Yet, with everything nice and tight, i still get an oil film on that IC pipe........

Is that massive blow-by? All pipes (including IC itself) barely have any traces of oil in them at all...........what could it be from?

hosrom_951

bump......

Jeremy Himsel

What kind of shape is the hose in? If it's original, it's probably hard as a rock and no matter how much you tighten it down it'll probably not seal. See if you can squeeze the hose and compress it.

Jeremy Himsel

Oh yeah. The hose that come off the side of the IC to T-body pipe goes to the idle air control motor, not the venturi system (otherwise you'd be pressurizing your crank case under boost).

hosrom_951

I think that maybe the problem........

According to everyone, taking off the intake manifold should take approx 20~30 mins. Maybe next weekend i shall take it off and check the vacuum hoses under there.........

PorscheDoc

Here, i will save you 20-30 minutes. Your vacuum lines are almost for sure shot and need to be replaced. More than likely they are hard as rocks and aren't making good seals where they should. So with that being said, I would plan on replacing all the lines and getting rid of the venturi tube. When you pull the intake, all you are going to see is a giant ball of vacuum lines running everywhere, and they will all be hard as a rock. So before you pull your intake and have to sit with the car apart for a week, I would order what you need to update the system from lindsey or myswiss and then do it all at once. There are 3 updated porsche hoses, and some 3/4" hose from the o/a seperator to the j-boot. Start to finish taking your time will take you about 3-4 hours tops. Only thing lindsey doesnt include (and i doubt my swiss....hint hint guys) is there is a 3/4" rubber male male 90 degree elbow on the top of the oa seperator that needs to be replaced....i just went to napa and found a radiator hose and cut it to size for 9 bucks. Also you need 1 male male straight plastic connector....and one 45 degree (though 90 will work) male male connector.