Looking for oil breather diagram

[ADDvanced]

So I've looked at the porsche parts catalog, and I know what part numbers are, and I checked all my photos right after I pulled my engine, but what I don't know is where the two medium sized oil breather hoses go in the engine bay, here's what I have:

Port A: Back of the black box thing in the engine bay near the oil filter, in front of it. Where does the BACK of that thing go?

Port B: Hose coming out from tunnel with fuel lines

Port C: Engine intake, right under air filter

Port D: Same as above but slightly lower/further forward. Does this make sense? I can take more pics tomorrow but I'm not sure which goes to what.

It's a 77 911S btw.

[Walt Fricke]

B might be the vacuum line for power brakes - some '77s had them, very early ones did not.
Pictures are the only way to go for the rest absent better and more standard names.

[Showdown]

A: that hose goes to the gas tank and is used for fuel vapors etc… the black thing in the engine bay is a charcoal container.

B: brake booster in the front trunk, if you have one, or it could run to the gas tank as part of the above

C & D: need pics

[Bill Verburg]

Originally Posted by ADDvanced

So I've looked at the porsche parts catalog, and I know what part numbers are, and I checked all my photos right after I pulled my engine, but what I don't know is where the two medium sized oil breather hoses go in the engine bay, here's what I have:

Port A: Back of the black box thing in the engine bay near the oil filter, in front of it. Where does the BACK of that thing go?

Port B: Hose coming out from tunnel with fuel lines

Port C: Engine intake, right under air filter

Port D: Same as above but slightly lower/further forward. Does this make sense? I can take more pics tomorrow but I'm not sure which goes to what.

It's a 77 911S btw.

[ADDvanced]

Port A. facing front of car

Port B. Line coming from tunnel w fuel lines

Port C: Intake, near air filter, coming in the side

Port D: Further forward/lower, going into the lower half of the
intake

[ADDvanced]

If the hose from the fuel line area (B) is for brake booster, I'm guessing that goes to the (D) LOWER/FRONT half of the intake, for vacuum?

That would mean the hose from the FRONT of the charcoal canister (A) must go to (C) on the intake?

[mike sampsel]

[/HTML]

Originally Posted by ADDvanced

If the hose from the fuel line area (B) is for brake booster, I'm guessing that goes to the (D) LOWER/FRONT half of the intake, for vacuum?

That would mean the hose from the FRONT of the charcoal canister (A) must go to (C) on the intake?

Right, D (brass fitting on airbox) goes to the brake booster. Other one loops around other side to charcoal canister.

At least my ‘78 does.

[mike sampsel]

Originally Posted by mike sampsel

[/HTML]

Right, D (brass fitting on airbox) goes to the brake booster. Other one loops around other side to charcoal canister.

At least my ‘78 does.

Bentley (for SC) shows a picture. The front of the canister has two hose nipples. One goes to C, the other (smaller) goes expansion tank off the gas tank. The rear nipple on mine has no hose, picture in Bentley is called a “cooling fan to charcoal canister”. This is to connect somehow to nipple off the engine fan with multiple diameter hoses. As I said, my single nipple off the rear (rear point to rear bumper) of the canister has no hose attached, and I can’t find any place on the cooling fan for it. It has been this way for at least since ‘84 when I got the car.

[ADDvanced]

Thanks Mike!