14 replies to this topic

[T5BRICK]

i was poking around under my hood looking for holes in my boost hoses this evening. i came across the rubber elbow on the left side of the intake manifold, it was hidden under one of the radiator hoses.

well, the elbow was totally trashed but not even connected to anything. instead, someone had routed a 4mm rubber vacuum hose up over the injectors, but under the aluminum shield. it goes down and connects into something near the turbo. the old line was just left in there, not connected to anything.

how much work is involved in re-routing this line? i have no idea if it is even routed correctly anyway.

also, i was wondering if anyone had a diagram of where the many vac lines should be.

[Plan_B]

Thats crazy Andy!, can you have your dad look at it?

[prasamin]

it's routed correctly actually...i know this because that's how I have mine routed until I can get a new PCV assembly or access it to clean the PCV out....

[T5BRICK]

Thats crazy Andy!, can you have your dad look at it?

nope, i found it myself. i had looked over this stuff before, but never this closely.

it's routed correctly actually...i know this because that's how I have mine routed until I can get a new PCV assembly or access it to clean the PCV out....

odd. a peice of the old line is still stuck under there. i can't tell where it is running, but that is what the elbow was connected to.

[T5BRICK]

thanks Doug. i may just do that when i get new silicon line.

[prasamin]

Felix, I just went through this. The OEM path is from that port on the intake, down under the intake, around the DS of the motor to a valve on the intake plumbing JUST before the turbo inlet.

What I did, because its such a PITA to get that fitting (and I forgot about it till after I put the intake back on) was plug the port on the intake. Then I just used one of the open vac lines from the vac tree by the TB to route to the valve by the turbo. Just seemed easier to me.

So far so good

now there's someone who thinks when it comes to cars....why didn't I think of that!...I wish I had the same creativity with cars as I do with teeth!

[beachnut]

Doug - that's a great idea bud! But I wonder why Volvo didn't do that in the first place? There's at least two free stubs on my vac tree If I Recall Correctly. What's the importance of taking it off the intake of the manifold?

[deeruck]

In fact, some do have it like that. My Australian 850 has it routed from the vacuum tree to a metal pipe that runs under the spark plug cover, then back to rubber hose down to the PCV tree.

[prasamin]

now if that hose is part of the PCV, then doesnt it do some kind of recirc....if it does, then recirc would not happen if you connect it to the vac tree, am I right?....Rich may know about this one.....

[prasamin]

The large rubber hose should connect to the breather box. The vac line that kicks on the valve can be connected to any vac port.

okay, makes sense....i will be rerouting mine too then.

[xtonyx]

pics? diagram? doodle?

[prasamin]

no diagram needed......there's a hose that is on the left side of the intake manifod....plug it up

now, run a hose from the vacuum tree under the TB cover to the PCV nipple on the plastic pipe going from the MAF to the turbo, closer to the turbo