Hot air ducting - any diagrams?

[milfredo]

While under the van doing the breaks and greasing the beam, I noticed that the hot air pipe, from the back of the van to the front, has a smaller junction splitting off it towards the front, just before it splits to the left and right of the van. This small section points downward and has nothing attached to it. I'm guessing that a lot of hot air would be pouring our of here when I have my heating on. What is meant to attach to this pipe and where should it route to?

I can't seem to find any diagrams in the bentley to help me.

Cheers,
Will

 

[Clem]

Sounds like the pipe that connect to the vents that are at the 'walk through' section of the van at floor level. Should be a smaller bore corrugated pipe that connects it.

@sparkywig will have a diagram, I reckon.

 

[milfredo]

This bit! Not my van, I found this on google images. Where should it go and am I losing a lot of air?

 

[ozziedog]

You are bound to be losing some air, and as in any situation of trying to force air through piping or ducting, the air will always exit at the first and easiest point. As said by Clem there should be a corrugated flexible pipe to allow that exit to connect with the floor vent that exits into the central cargo bay from between the front seats at floor level. The caviat here is not all vans had this vent. If the van was intended as some of the commercial types like a panel (mine) or a pick up etc etc . Not only would they not have the vent, they wouldn’t have had that spigot / off take either. So if it’s original you should find a vent, if it’s off another van then you may not. Even bunging it up with a suitable plug would help loads.

Ozziedog,,,,,,,,,looks very clean under there.

 

[milfredo]

You are bound to be losing some air, and as in any situation of trying to force air through piping or ducting, the air will always exit at the first and easiest point. As said by Clem there should be a corrugated flexible pipe to allow that exit to connect with the floor vent that exits into the central cargo bay from between the front seats at floor level. The caviat here is not all vans had this vent. If the van was intended as some of the commercial types like a panel (mine) or a pick up etc etc . Not only would they not have the vent, they wouldn’t have had that spigot / off take either. So if it’s original you should find a vent, if it’s off another van then you may not. Even bunging it up with a suitable plug would help loads.

Ozziedog,,,,,,,,,looks very clean under there.

Nice one! Mine is an original West and has the control cable so I'm guessing the hole is there to be plugged. I always wondered why the lever did nothing under my seat, this explains it.
Back under the van for me then! joy

 

[milfredo]

Nice one! Mine is an original West and has the control cable so I'm guessing the hole is there to be plugged. I always wondered why the lever did nothing under my seat, this explains it.
Back under the van for me then! joy.s.

p.s. mine is not that clean

 

[milfredo]

So managed to get under there... Wow the OG clamps are tight! I could hardly move them with my larger pliers. I put a plaster on it which I don't think is going to hold up too well but we will see.

...And then I realised that there is no cable connected under the front seat! AGHHHHH

 

[milfredo]

There is a cable, it doubles back on itself. Winner

 

[mginty]

Hi there, just wanted to say thanks for posting this as I've just been crawling under my van and noticed the very same! I've seen this tubing which I'm guessing is the right piece? Attached are my pics, the sealed bit came off in my hands yesterday!

 

[milfredo]

Hi there, just wanted to say thanks for posting this as I've just been crawling under my van and noticed the very same! I've seen this tubing which I'm guessing is the right piece? Attached are my pics, the sealed bit came off in my hands yesterday!

View attachment 5010View attachment 5011

That is the right piece. In the top photo, you can see the cable that open ms and closes the flap to divert hot air to the rear. Get some light oil on the flap inside the tube before fitting a new one. The top clap you have on there is an absolute bastard to remove in the space you have. Or it was for me at least.