What are these twisty knobs for?

[BonkersConkers]

Cleaning out the engine bay, may of twisted these knobs a bit. Would like to know what they are before I fire the old girl up.. Cheers

[RFC1]

I think they are the dust caps on the high and low pressure air con fittings.

[BonkersConkers]

RFC1 said:

I think they are the dust caps on the high and low pressure air con fittings.

Many thanks!