What's this pipe?

[madhouse]

As the title says....
It is located down near the turbo but doesn't have anything connected to it. Any ideas please? Oh on a 1995 850 T5 by the way.
Cheers
Mark

http://i42.photobucket.com/albums/e313/M11REH/Car%20stuff/turbo1.jpg

[Chad]

looks like your breather pipe which is connected to your PCV system.

[madhouse]

looks like your breather pipe which is connected to your PCV system.

So ok to vent to 'fresh air'?

It shouldn't be connected to somewhere?

Mark

[Rnash2002]

So ok to vent to 'fresh air'?

It shouldn't be connected to somewhere?

Mark Is the end not connected to the turbo inlet pipe?

[madhouse]

Is the end not connected to the turbo inlet pipe?

Nope conected to nothing, just dissapears inside the 'jacket' next to the cam sensor side of the engine block.

All other turbo pipes are connected i.e. BCS and vaccum pipes back to the inlet manifold etc this just seems to be a strange pipe.

Doesn't feel to have any vaccum when the engines running. Any further thoughts chaps??

[Dangerous Dave]

That pipe usually connects where that other pipe is connected just below the crimp clip in that pic. The other end connects to the end of the inlet manifold behind the power steering pump (bugger to get to). Looks like someone has substituted that bigger pipe. Make sure the bigger pipe connects to the end of the manifold. Its all part of the PCV (positive crankcase ventilation) system. The purpose of that pipe (or its substitute) is to equalise the pressure in the PCV system so that the intake doesn't draw oil from the oil trap (I think).

They have probably done that as the small pipe can get blocked up with crud from the oil trap (when the PCV system gets old) and replacing the small pipe involves removing the inlet manifold. Maybe it was an alternative to buying the new parts for the system (which aren't that cheap) and a length of vac pipe was a cheaper option.

HTH

[madhouse]

That pipe usually connects where that other pipe is connected just below the crimp clip in that pic. The other end connects to the end of the inlet manifold behind the power steering pump (bugger to get to). Looks like someone has substituted that bigger pipe. Make sure the bigger pipe connects to the end of the manifold. Its all part of the PCV (positive crankcase ventilation) system. The purpose of that pipe (or its substitute) is to equalise the pressure in the PCV system so that the intake doesn't draw oil from the oil trap (I think).

They have probably done that as the small pipe can get blocked up with crud from the oil trap (when the PCV system gets old) and replacing the small pipe involves removing the inlet manifold. Maybe it was an alternative to buying the new parts for the system (which aren't that cheap) and a length of vac pipe was a cheaper option.

HTH

Spot on for that - cheers. I had a similar post on ..ahem.. another forum which came back with the same kind of reply. It makes sense now, and yes the pipe below does follow around the block to the inlet manifold / PCV area so what you say seems very feasible.
Reassuring that the PCV has had some loving recently eh? One less task to deal with :smile:

Thanks again for the input guys.

Just need to get my boost back on track, or fit a MBC I'm thinking!

[Dangerous Dave]

No probs matey.

Check your intake system for leaks, I did mine by getting a length of hosepipe and gaffa taping it to the turbo intake, then blew into it and listened for any leaks (bit basic, but it worked). My injector seals were leaking and the charcoal tank one-way valves were knackered (oh and there's a hole in the bottom of the intercooler which lets any oil/water residue out, so there will be a leak noise from it. I just put some gaffa tape over it for the leak test)

Be careful with an MBC, I'm sure you've heard what can happen. I've got one on mine, and as my turbo comes in earlier (as its smaller) I don't think it has done the engine life any good!

[madhouse]

No probs matey.

Check your intake system for leaks, I did mine by getting a length of hosepipe and gaffa taping it to the turbo intake, then blew into it and listened for any leaks (bit basic, but it worked). My injector seals were leaking and the charcoal tank one-way valves were knackered (oh and there's a hole in the bottom of the intercooler which lets any oil/water residue out, so there will be a leak noise from it. I just put some gaffa tape over it for the leak test)

Be careful with an MBC, I'm sure you've heard what can happen. I've got one on mine, and as my turbo comes in earlier (as its smaller) I don't think it has done the engine life any good!

Bloody good idea... but it's late and I'm being blonde which pipe did you give a good blow? (!) Oh and about the MBC you say your turbo is smaller...how do you mean? Are you not running an 850 / V70? When 'should' the 850 fully boost? My 2001 Volvo T4 comes on at 2800rpm the gives a fecking great shove in the back in any gear, which is why I feel my T5 is lacking something??

Piccy below if it helps!

http://i42.photobucket.com/albums/e313/M11REH/Car%20stuff/OdingeT55.jpg

[Dangerous Dave]

I usually remove the intake pipe from the air filter box/MAF to the turbo and attach some pipe directly to the turbo intake. You can attache it to the intake pipe just after the MAF, but you have to block off the PCV pipes and the BCS and fuel regulator pipe.