I know the horizontal output from the oil filler tube attaches to the UIM and includes the PCV valve, but where does the vertical (downward) output go. I think it eventually connects to the turbo side but where specifically does the hose go from the oil filler tube connection?

 

It goes to a hard line (IIRC), which snakes down to the primary turbo inlet, where it's connected by a hose.

 

Thanks but I’m kind of slow. Exactly which hard line? Is there a diagram I can reference? How long is the hose might help me.

 

It's been a few years for me. I'm sure there is a diagram, I don't happen to have it, but it's a group of 2-3 lines that go from near the filler neck and the vaccum chamber to near the turbos, above the OMP... the others go to turbo actuators. It doesn't matter too much which one you use, so long as you route the corresponding end at the bottom to the right places places.

 

Its shown in the vacuum diagram

 

Ahhh, you aren't slow. This is very easy to look over since many people forget about this hose because the PCV is useless, they stopped installing them from the factory in 95' or routed them differently, I forgot the exact details. Anyways I would honestly delete it and installed a catch can in it's place since it's one of the common failures for a boost leak.

But if you MUST install it for whatever reason, here are the details:





Try and find the OEM hose if you have it, I highly recommend it since there is a lot of bends to get down to the hardline port. You could use a silicone hose but if you have OCD, it will look sloppy going that route. Moreover, the OEM hose is discontinued, PN: N3A220370A, it is replaced with PN: N3A120371 but the replacement is a universal hose with no molded elbows so it's as good as a silicone hose.

I hope this helps because I've been down this rabbit hole and thought I'd share the gist of everything that I found over hours of research years ago. You're welcome to do you own research but installing a catch can is much better IMO. It eliminates a common failure for boost leaks, it keeps your intake track clean from oil build up; including keeping oil away from all the vacuum hoses in the rats nest. Catch can for the win!

Lastly, this hose isn't in the vacuum diagram for whatever reason, it just shows half of it.

 

Catch can it is!! Thank you. You just saved me a ton of work and aggravation! I love this forum.