Fresh air duct

[Oldred_V8S]

I've got the engine stripped down at the moment and noticed that I can get to the nearside fresh air duct pipe where is joins the inlet for the car (at rear of engine above the bell housing). The offside pipe runs to the inner panel of the O/S wing so does not look too bad, but the nearside is a total blood mess; it runs above the exhaust pipes and makes changing the number 7 spark plug, a pain in the arse. Can anyone tell me why there are two pipes, do they serve different purposes and what will I lose by removing the nearside one?

[Oldred_V8S]

Excellent. Thanks for the replies. I wasn't sure if they supplied the rest of the heating/venting system. A chance to clear up the engine bay then.

[Oldred_V8S]

The anaconda is out!

Engine bay looks a lot better and it is now possible to see the spark plugs on the L/H side.

Sealed the intake with an aerosol cap filled with mastic.

Will get around to removing the R/H one later this week.

Now just need to clean the engine bay; spray the rocker covers; fit the rocker pedestal shims; clean up the inlet manifold; fit a new valley gasket; fit the plenum; reinstall the radiator and its support bracket, and the fan of course and then refit the bonnet!

Then clean up the garage.

[Oldred_V8S]

greymrj said:

I would really like to get fresh air to the heater box to improve the demisting. Given where the heater input is, it shouldnt be so difficult. I just haven't got round to working out a system!

Where is the inlet to the heater box? I am just thinking that if I do keep the off-side pipe (it is less of an eye-sore/hinderance under the bonnet) I could switch the pipe to the heater box.

I agree that having the window open is a pain and if it is raining, it allows the water to come in.

[Oldred_V8S]

phillpot said:

Oldred_V8S said:

Where is the inlet to the heater box?

This is your heater, stuffed up behind the dash near enough centrallly.

If you removed the dash you'd see this side.....



If you could see through from the engine bay you'd see this side.....



There is a flap moved by the heater slider that directs air either out the top (3 arrows) to the screen or into the white tube to feed the eyeball vents in the foot wells. That flap is a very poor fit in the housing so even when set to "interior" the majority of hot air squeezes past it back to the screen vents rather than take the convoluted path to those foot well vents.

Thanks Mike that clarifies things nicely. Looks a hi-tech bit of kit.

[Oldred_V8S]

NaCl said:

phillpot said:

The heater feeds the screen vents, dash side vents and the "eyeballs" in the footwells. It is a 100% re-circulation system, air is drawn in from within the car, there is no fresh air input.

So all that palarva with the 2 long tubes just to blow a bit of cool air on the back of your radio....in a rag-top car?

There fixed that for you.

[Oldred_V8S]

woodlandsale said:

Lots of helpful pictures and opinions here. I would like to re-instate the o/s pipe in my car because the management doesn't appreciate the warm air all going to the o/s dash outlet whilst she gets cold out of her side. The whole lost seems to need sorting out, but where can the flexible pipe (the anaconda) be obtained from? I can't find any that's big enough (60mm OD, right?).

But from what I read above, the anaconda pipes only supply cold air to the vents in the centre console. As Phillpot wrote above, the heated air is pulled from inside the car.