Big crankcase vacuume leak

[GetAwayFromMe]

Let's try this here since i didnt get any help elswhere. Everyone else must be lost just like me on this one. First off i checked all the hoses, switched my old PCV valve with new and nothing. When i open my oil cap or pull my oil dipstick it sucks air like crazy. Today i took my F hose off and it's sucking air through there like crazy is that normal?

I dont know the 2.7t motor very good but whatever needs to be replaced i can do it. Could bad intake cam follower do this? Im lost at this point and have no clue what else to look at.

Here is a vid i made.

[spinny]

I asked my friend and he said you have a hose hooked up backwards somewhere.

I'll try to get him to look at the video for you.

[GetAwayFromMe]

I asked my friend and he said you have a hose hooked up backwards somewhere.

I'll try to get him to look at the video for you.

Please do man i need this fixed. I dont really wanna drive the car til this gets resolved. I looked over the hoses and cant see anything wrong. I wish someone had an S4 in my area so i can look at the engine bay.

[gmann]

Yeah, sounds like you have a manifold vacuum line running to your crankcase. Pressurizing your crankcase = BAD IDEA. so you're doing the right thing by keeping it parked until you get it fixed.

Side not for any smart ass comments to come: pressurizing your crankcase is completely different from pressurizing your cylinder.

[spinny]

I had mentioned something about it to him briefly and he said "yeah he has a hose backwards"

I THINK I remember him saying something about possibly the brake vacume hose, or something "back there"

Get a schematic, and double check your work.

[GetAwayFromMe]

I had mentioned something about it to him briefly and he said "yeah he has a hose backwards"

I THINK I remember him saying something about possibly the brake vacume hose, or something "back there"

Get a schematic, and double check your work.

I believe when i pulled the motor Brake booster hose stayed on and i didnt touch it just unpluged it from the booster but i will double check everything.

Thanks.

[GetAwayFromMe]

Yeah, sounds like you have a manifold vacuum line running to your crankcase. Pressurizing your crankcase = BAD IDEA. so you're doing the right thing by keeping it parked until you get it fixed.

Side not for any smart ass comments to come: pressurizing your crankcase is completely different from pressurizing your cylinder.

Bad part is i already drove the car for about 60 miles It will not move until it's fixed for sure now.

[GetAwayFromMe]

I used this diagram to check everything over.


below is a pic when my motor was out.


What else could it be if all the hoses are connected right? Intake followers? Anything internaly. I dont think so but you never know with these cars.

[spinny]

I used this diagram to check everything over.


below is a pic when my motor was out.


What else could it be if all the hoses are connected right? Intake followers? Anything internaly. I dont think so but you never know with these cars.

I had my buddy take a look at this post real quick.

here's what he said

i would be willing to bet a large amount of money that the big "spider " set of crankcase ventilation is on backwards , wrong , or broken.

He also said there's no way it's the cam followers.

Also if you could post up some really close pics of the rear of the motor where the 'spider' crankcase ventilation is he could look at it for you.

[infinkc]

there is a check valve on the back of the engine that people replace backwards and causes problems, forgot what one it is.

[GetAwayFromMe]

I had my buddy take a look at this post real quick.

here's what he said

i would be willing to bet a large amount of money that the big "spider " set of crankcase ventilation is on backwards , wrong , or broken.

He also said there's no way it's the cam followers.

Also if you could post up some really close pics of the rear of the motor where the 'spider' crankcase ventilation is he could look at it for you.

It's impossible to put the spyder hose backwards on this car. Just look at the pic above and you will see. I will try and get a close pic of the back when i get the car back from the exhaust shop.

I had some time to look at it more and it seems that some hose is hooked to a place where is doesnt belong all the crankcase hoses are in where they should be. Another thing is that turbo hoses might be hooked up wrong causing the vacuume to the manifold and going to the crankcase.

[GetAwayFromMe]

there is a check valve on the back of the engine that people replace backwards and causes problems, forgot what one it is.

Hmm... Whitch one? I didnt remove any check valves when i removed the manifold i left them on. What's the chance i mixed up one of the turbo lines? How much vacuume do turbos produce anyway? I wish i had access to some nice diagrams of all the hoses that would help alot.

[spinny]

Please update the thread - I know you fixed the issue.

Just in case anyone else has this issue, the search function will help them.

[wdbdy2000s4]

who uses search?

[spinny]

who uses search?

People who aren't toolbags? non n00bs?

[wdbdy2000s4]

People who aren't toolbags? non n00bs?

::looks around and realizes these people hardly exist on audizine::

[lowered97a4]

lol ya thats true but maybe those few will find it id like to know what it was its pretty fucked up

[GetAwayFromMe]

Well.... The vacuume was comming from the intake manifold right by the throthle body going to the F hose. I never fixed it i just capped the pipe and the f hose and called it a day. I Pressure tested it and found a check valve to be cracked somehow, i replaced that since but i dont thing that's what caused my problem.

I dont think i should say that i fixed it but i dont have a vacuume leak anymore and the car runs just fine. I can boost 22psi no problem. Before it wouldnt go over 14psi.