Very strange bolt!!

[Rp0thejester]

I need help with this one guys, what is that bolt doing there??

[myglaren]

Plugging a vacuum hose by the look of it.
A modification by a previous owner?

[Rp0thejester]

A vacuum to what would be my question, it's next to the intake manifold, so it's concerning me a little

[CitroJim]

Is that the EGR actuator?

[Rp0thejester]

That's what I'm worried about. Can't find any decent info on C8 2.2s anywhere on the web. Even FCF results in Google give little to no info on placements/engine layout

[Hell Razor5543]

Whereabouts is that pipe? My C5 has a 2.2 engine, so it might be possible for me to help work out where the pipe should go.

[Rp0thejester]

hope that helps to locate it.

[Hell Razor5543]

The last photograph shows something with what looks like a corresponding spigot (or where one should be) by the bolt head. Unfortunately there are quite a few differences between my engine and yours.

[MattBLancs]

EGR pipe (connected to inlet manifold) goes sailing past this mystery pneumatic actuator, so seems unlikely to do with this??

Markup of your image

[Rp0thejester]

This is why I love to hate my Citroen, she's different to the others

[Hell Razor5543]

You could try to 'bodge' a spigot onto that part just behind the bolt. It would take some care, because you would have to drill out the remains of the broken spigot and then fashion a replacement (probably from brass, as this is quite malleable).

[Rp0thejester]

I don't think it's broken, a simple jubilee clip should fit it, it just puzzles me as to why a bolt has been placed there and why?? And what's the reason for not fitting it back on to the other thingy me jiggy

[Hell Razor5543]

Well, you could connect it up and see what happens! I wonder if that is a vacuum device that is playing up (hence whey the pipe was disconnected)? On a previous C5 I had an electro-valve gone short circuit, while the EGR valve had a split diaphragm.

[Rp0thejester]

If I didn't need the car for work tomorrow I would but don't want to risk it. After tomorrow I'm back on the train so will see what happens

[MattBLancs]

On my 2.2 HDI 406 Coupe, there is a vacuum driven actuator roughly in the same area - it is quite a bit lower down, nearer the gearbox bell housing. On mine this is for the inlet swirl flaps (shut at lower RPM, I think this shuts part off and the engine works as though 8 valve (1 inlet valve per cylinder is flowing) Higher RPM flaps opened and 2 valves per cylinder available for the air rushing in.

Agree, it has hallmarks of previous owner: "split diaphragm, can't (or can't be bothered!) to source new actuator, do just plug it and keep driving"

I think on the Coupe forum there was discussion about some of these actuators being unavailable / very difficult to source.