Breather Hose Insulation

More out of curiousity than anything... somewhere on this forum (I can't find where just now) is a picture of an 8 valve engine bay (1.1 or 1.4) where the breather hose is insulated from the intake manifold back to the throttle with what looks like ordinary pipe insulation (the sort you might put round a water pipe) and fixed with cable ties.

I thought it must have been a DIY job, but then I see it appearing the Haynes manual (e.g. page 4A.9). So I assume it was fitted as such by Citroen.

Presumably its purpose was to help keep the vapours hot? Was it model specific, or just the sort of thing that gets removed and not replaced? I couldn't find any recalls about it, and my car doesn't have this.

C3Safari wrote:More out of curiosity than anything... somewhere on this forum (I can't find where just now) is a picture of an 8 valve engine bay (1.1 or 1.4) where the breather hose is insulated from the intake manifold back to the throttle with what looks like ordinary pipe insulation (the sort you might put round a water pipe) and fixed with cable ties.

I thought it must have been a DIY job, but then I see it appearing the Haynes manual (e.g. page 4A.9). So I assume it was fitted as such by Citroen.

Presumably its purpose was to help keep the vapours hot? Was it model specific, or just the sort of thing that gets removed and not replaced? I couldn't find any recalls about it, and my car doesn't have this.

This one?

That one! Any idea why it happens to be on some C3s?

C3Safari wrote:That one! Any idea why it happens to be on some C3s?

No idea. The breather doesn't have much impact on the engine compared to the air filter inlet and that one looks a bit home-made.

I think the Haynes manual was produced in Canada, maybe something to do with iceing in extreme weather. Just a guess.