What does this pipe do?

[Migalot]

The other day I noticed this pipe is completely kinked. I presume it perfoms a necessary function, but what is it and what does it do (the clear/white vertical one)?

Power brake associated, it seems.

[Doctor Gollum]

One way valve so you don't immediately lose the vacuum in the brake booster should the engine unexpectedly stop whilst driving.

The Ts supply vacuum to the heater controls and possibly the multirams

[Migalot]

One way valve so you don't immediately lose the vacuum in the brake booster should the engine unexpectedly stop whilst driving.

The Ts supply vacuum to the heater controls and possibly the multirams

Thanks Doc. 

Obviously needs replacing. I would guess any pipe of a similar diameter would do? 

[Doctor Gollum]

You might get away with shortening that clear hose... It's already been replaced once as it should be similar to the black rubber ones.

Regardless, be bloody gentle with it as the spigot on the one way valve has a nasty habit of snapping off and it's not quite as simple as replacing it. 

With that in mind, you may wish to trim it at the T end...

[Migv6 le Frog Fan]

Pretty sure it should be a rubber elbow the same os the one beside it. I may have a spare or two in the shed. Will try and have a look in the next couple of days, and if I have one can send it to you. 

[Doctor Gollum]

Pretty sure it should be a rubber elbow the same os the one beside it. I may have a spare or two in the shed. Will try and have a look in the next couple of days, and if I have one can send it to you. 

Indeed it should

[zirk]

As far as Im aware its a Hard ABS Plastic Heat Resistant Pipe with a One Way Valve, the idea being it doesn't collapse like a Rubber Pipe could do under a high vacuum pressure. so needs to be replaced like for like rather than any old rubber pipe.

[Doctor Gollum]

As far as Im aware its a Hard ABS Plastic Heat Resistant Pipe with a One Way Valve, the idea being it doesn't collapse like a Rubber Pipe could do under a high vacuum pressure. so needs to be replaced like for like rather than any old rubber pipe.

Talking about swapping out the clear hose from the valve to the vac T

That would originally have been black rubber.

The main vac pipe from the plenum to booster is indeed a different animal and is heated, joined and crimped to the fittings. I seem to recall it being a plastic coated metal pipe. In theory you can buy all the parts and make a new one, but it's a bear to do.

[Migalot]

Pretty sure it should be a rubber elbow the same os the one beside it. I may have a spare or two in the shed. Will try and have a look in the next couple of days, and if I have one can send it to you. 

That would be great, Albs. Email me if you find one. 

[zirk]

As far as Im aware its a Hard ABS Plastic Heat Resistant Pipe with a One Way Valve, the idea being it doesn't collapse like a Rubber Pipe could do under a high vacuum pressure. so needs to be replaced like for like rather than any old rubber pipe.

Talking about swapping out the clear hose from the valve to the vac T

That would originally have been black rubber.

The main vac pipe from the plenum to booster is indeed a different animal and is heated, joined and crimped to the fittings. I seem to recall it being a plastic coated metal pipe. In theory you can buy all the parts and make a new one, but it's a bear to do.

Fair do"s 

[VXL V6]

As far as Im aware its a Hard ABS Plastic Heat Resistant Pipe with a One Way Valve, the idea being it doesn't collapse like a Rubber Pipe could do under a high vacuum pressure. so needs to be replaced like for like rather than any old rubber pipe.

Talking about swapping out the clear hose from the valve to the vac T

That would originally have been black rubber.

The main vac pipe from the plenum to booster is indeed a different animal and is heated, joined and crimped to the fittings. I seem to recall it being a plastic coated metal pipe. In theory you can buy all the parts and make a new one, but it's a bear to do.

No metal, just hard plastic. Tends to rub on the A/C pipe if someone has had the plenum off and doesn't put the spacer clip back in place.

[Doctor Gollum]

I remember it being a total pig to reassemble following said rubbing, and that the tubing is/was available from VX 

[Kevin Wood]

I suspect that hasn't been plumbed right. There should be 2 separate vacuum feeds from that point. One to the heater controls reservoir and one to the multiram one.

I think one has failed and the two haven just been bridged there with an elbow to stop it leaking. It may even be bypassing the one-way valve, looking at it, which would be potentially unsafe.

[Migalot]

I suspect that hasn't been plumbed right. There should be 2 separate vacuum feeds from that point. One to the heater controls reservoir and one to the multiram one.

I think one has failed and the two haven just been bridged there with an elbow to stop it leaking. It may even be bypassing the one-way valve, looking at it, which would be potentially unsafe.

That's weird. I can't recall any work on the car in that area and I've had it for the best part of 14 years.

Can someone take a photo of what it should look like and post here?

TIA

[Doctor Gollum]

Someone probably lost the rubber hose in question during an HBV change

Unless it was you, it is unlikely that it would have ever been mentioned