Help with connecting hoses in the 3.0 install

[tadel001]

I installed my 3.0 but I know I don't have all the hoses hooked up correct.

1) There are two outputs coming out of the Air Flow Boot. In the picture below, what hoses connects to this output and where does it go?

2) When I remove the oil cap when car is running, it stalls. I understand I am missing hose connection. The picture below shows the small neck coming out of the top of the oil filler neck. I assume a hose connects to this. Where does it go to?

Thanks!

[Flat6pac]

Youre dealing with two different engines. The hose off the tank is for a 74 to 77 the top of the engine is a 78 to 83 where the oil fumes are sucked directly into the engine to be burned. The oil tank is sealed.
The early hose attaches to the side of the air box and the fumes condense into an oily mess on the flat of the airbox.
Attach a hose from the oil tank to the black boot and youre complete.
Bruce

[tadel001]

Yes, this is a 3.0 engine in a 2.7 chassis. What I initially did was connect a hose from the oil tank to the black boot. I plugged off the small neck coming of the oil filler neck. I did not have a hose attached to the breather cover. Result, engine dies when I check oil and oil is blowing out of the breather cover all over the rear top of the engine. So, i think I need to connect a hose from the breather cover to the oil tank, right? That would be the hose I currently have on the boot. So what would then go to the boot?

[Gunter]

On my '80 SC, the oil tank has 2 hose-connections on top:
1 hose comes from the black rubber boot between TB and Mixture Control Housing going to a connection on the oil filler neck right under the cap,
The 2nd hose comes from the breather cap on top of the engine going to a connection right next to the oil filler stud on the tank.

Both hoses are about the same size and need a clamp on each end to really seal.

The idea is to release the fumes from the engine case via the breather cap into the oil tank and have the fumes sucked into the intake to form part of the combustion process.

Both hoses are a Porsche part and the one from the filler neck to the black boot has a restrictor inside: 930-107-289-00
Do you have the 2 hose connections on the tank and filler neck?
One on the filler neck and one right next to it, both the same size?

[tadel001]

I have one hose low down on tank (near the base of the filler neck) that i have currently connected to the output on the air boot shown above. The second (black rubber hose) hose connects to the CIS and is shown in the picture above (bottom picture). Then there is that goldish color nipple near the fuel cap (again bottom picture) that has nothing connected to it.

So, I have three outputs that need connecting: (1) crank case oil breather; (2) connection on right side of CIS where the black hose in the bottom picture is about to connect to; and (3) the output on the Air Flow Boot show in the top picture.

Thanks for any help.

[Gunter]

Originally Posted by tadel001

I have one hose low down on tank (near the base of the filler neck) that i have currently connected to the output on the air boot shown above. No! The hose from the base of the filler neck should go to the breather cap The second (black rubber hose) hose connects to the CIS Not sure what you mean?? Connects to CIS??and is shown in the picture above (bottom picture). That connection should have a hose going to the back of the boot to the 90 deg Alu nipple to suck out fumes from the tank Then there is that goldish color nipple near the fuel cap (again bottom picture) that has nothing connected to it. I would just plug that one

So, I have three outputs that need connecting: (1) crank case oil breather; (2) connection on right side of CIS where the black hose in the bottom picture is about to connect to; and (3) the output on the Air Flow Boot show in the top picture.

Thanks for any help.

Please, read the above and my earlier reply.

[tadel001]

Gunter, There is a hose fitting on the right side of my airbox (think it is the airbox) that is approximately where the black hose (in the bottom picture) is about to connect to. The hose with the metal hose clamp. Do you have that connection?

[Gunter]

Don't think I have that connection; '77 looks different. I don't like that because the bent hose is so short and doesn't have the restrictor in it?
That short hose without restrictor would make it easy for oil mist to be sucked into the intake. I'd go for the right SC-hose with restrictor and connect it to the rear of the black boot. Then I'd plug the small nipple on the filler neck. Of course, another hose needs to go from breather cap to the nipple on the bulkhead. I assume the '77 has this nipple?

Below is a picture of the filler neck etc. for SC's.

The nipple on the bulkhead next to the filler neck is for the hose going to the breather cap.
The nipple on the filler neck top is for a hose going to the black boot 90 deg Alu nipple. The hose contains the restrictor to prevent excessive oil mist going into the airbox!

[tadel001]

The attached picture is a picture of an airbox. On the right side you see two hose connections at the top and then one in the middle. It is the middle that I was connecting the hose to. Apparently wrong.

[boyt911sc]

Tim,

Is the hose connection you are interested is shown in the picture below? The small hose connected to a metal tube fitting (behind throttle linkage) goes to the brake booster. There is another hose connection near it. Plugged it.

The upper oil tank hose connection goes to the back of the CIS rubber boot and the lower oil tank connection is for the engine breather hose (braided hose shown in the pic.)

Could you post picture/s of your engine in question. Thanks.

Tony

[Gunter]

Originally Posted by tadel001

The attached picture is a picture of an airbox. On the right side you see two hose connections at the top and then one in the middle. It is the middle that I was connecting the hose to. Apparently wrong.

I am getting worried about you.
Me thinks these 3 connections are for the intake runners, not for breather hoses.

[boyt911sc]

Originally Posted by tadel001

Yes, this is a 3.0 engine in a 2.7 chassis. What I initially did was connect a hose from the oil tank to the black boot. I plugged off the small neck coming of the oil filler neck. I did not have a hose attached to the breather cover. Result, engine dies when I check oil and oil is blowing out of the breather cover all over the rear top of the engine. So, i think I need to connect a hose from the breather cover to the oil tank, right? That would be the hose I currently have on the boot. So what would then go to the boot?

Tim,

Slow down and take your time to get familiarize with your engine. You are trying to do things that clearly shows your lack of experience in the subject. I was also in the similar situation long time ago so don't don't feel offended if some people gave you a hard time. There are lots of help available in this forum. It would help if you provide us with pictures and start from there.

After reading your above post, my reaction was 'what he's trying to do???'. Plugging the breather line is a cardinal sin!!! You didn't know that so you are excused. You will have an easy time getting your engine back to life if you use an engine test stand. I could lend one to you. PM me if you are interested to use a home-made engine test stand. It has everything just put a motor and run.

Tony

[snbush67]

The hole on the right side of the air box (as viewed from the rear of the car) can be plugged as you are using a later model CIS.

The hole is under the filter so if it isn't plugged you will get unfiltered air. The hole is a leftover from earlier CIS versions.

For reference and clarification the hole you are talking about is viewed from the inside of the air box by removing the air box straps, the cover and the filter. It is a small 5/8" hole that is flush with the inside of the box and protrudes about 1.2" to the outside in order for a hose to be attached.

Plug it.

Your first picture shows where the top hose from the oil filler neck gets attached, this is the vent hose from the filler neck to the Air boot.

Your second picture shows that you have the wrong hose, for your application. You need to remove the old hose and replace it with a later hose. Plug the hole in the airbox and vent the tank to the top air boot.

In other word it is the same thing as Bruce (Flat6pac) stated above.

[tadel001]

You are right, I have very little experience. I will post more pictures. The engine runs fine right now (what do you mean bring it back to life?). However, because I didn't have a hose hooked up from the breather cover to the oil tank, it was spraying oil over the rear of the engine. I don't think I have any hoses plugged.

I am not offended at all with people correcting me/giving me a hard time. I just want to make sure it is done right, which is why I am posting. I think I am now 90% straight. I just need to see what I have connected to on the side of the right side of CIS (that was actually the only connection someone told me was correct. However, I am now thinking that is not a connection at all).

[tadel001]

snbush67, Thank you! That helps a lot. That makes all the other connection make sense.

[tadel001]

So I need to connect the hose to the breather cover. I removed the Air Flow Boot and I can feel the stub from the cover but it seems impossible to connect the hose. Any suggestions on how to connect it?

[pete3799]

That breather hose on the engine is going to be a hard one to do as there is little room
to get it and the clamp on.
A partial engine drop would help.

[tadel001]

for a partial engine drop, what would be disconnected. I am only looking for enough of a drop to get to the breather cover. I assume shifter coupler. Anything else?

[snbush67]

Originally Posted by tadel001

So I need to connect the hose to the breather cover. I removed the Air Flow Boot and I can feel the stub from the cover but it seems impossible to connect the hose. Any suggestions on how to connect it?

Your talking about the engine breather cover?

Thats a tough one. Did you install the engine?

If so do a partial drop. Or you could loosen the intakes and lift t up to slip the hose on and clamp it from underneath the air box. (not recommended as you will probably have an ass-load of air leaks when your done.)

Partial Drop:

You don't need to unhook the shift coupler. Unhook the battery and drain the oil, disconnect the lower oil line to cooler. Disconnect the 14 pin rear engine connector.

Put a jack under the engine (phone book or wood to protect the engine) and back the two engine mount bolts out evenly, then slowly lower the engine a few inches checking to make sure nothing is binding or pulling and that the engine is lowering evenly.

It is a good idea to put a couple of tires under the heat exchangers just in case something goes wrong, the engine wont fall to the floor and break.

Once you have it a couple of inches lowered and everything looks clear lower it about 6-9 inches.


(disclaimer- I am a novice and pretend to know just enough to be dangerous, I am not responsible for any bodily harm, mental anguish or material loss that may result from anything you choose to do based upon my shared experiences.)

[boyt911sc]

Originally Posted by tadel001

You are right, I have very little experience. I will post more pictures. The engine runs fine right now (what do you mean bring it back to life?). However, because I didn't have a hose hooked up from the breather cover to the oil tank, it was spraying oil over the rear of the engine. I don't think I have any hoses plugged.

I am not offended at all with people correcting me/giving me a hard time. I just want to make sure it is done right, which is why I am posting. I think I am now 90% straight. I just need to see what I have connected to on the side of the right side of CIS (that was actually the only connection someone told me was correct. However, I am now thinking that is not a connection at all).

Tim,

The pictures you provided in the other post titled '78 3.0 Oil Leak CIS with pictures' show the breather hose plugged. And you mentioned that something about a plugged hose. By looking at the picture #3, it seems to look like it is plugged. I was relying on your info about plugged hose. I am not even sure now if we are talking the same thing. You were the one who declared about a weird plugged hose.

Some clear pictures would probably help us in our communication. I'm a little confused now and so is Gunter. We try to offer help so it is important that we have good communication. Do you have a reference CIS manual that you could use?

Could you post pictures of the section in question? This way, some people would be able to give you good and relevant feedback. The picture of the air box you used for your question does not even show any hose connection.

Let's go back to square one and show us the hose connections you wanted to know.

Tony