has an injector started to leak?

[swarf]

hi I've had no problems with the car for 4 months then I started to here what sounds like a steam train coming from the engine, on removing the engine cover what I think is an injector is puffing out some sort of vapour, doesn't smell of diesel and I have no errors have a look a the video and see if anybody knows what it is.
https://www.youtube.com/watch?v=h3bu7jW4TV8
cheers steve.

[Uberderv]

Could be the copper washer which has failed letting cylinder pressure 'chuff' out...

[swarf]

thanks for the reply, the problem was very simple just an injector had become loose, the hardest bit was getting a 7mm allen key Halfords didn't have one but b+q did.
cheers steve.