I don't think there is a quick way if you have the lambda in..... Or at least not that I found. If you can get a tap spanner on it you're winning!
Sorted, but what an arse of a job. Tip for the Lambda. I used a cut down 22mm spanner from the right hand side. You can get enough of it on to loosen it then unscrew it by hand. But to do this you need to raise the swing arm as high as it will go then put something under it to stop it dropping. ( jack,wood chock, Spare pair of hands) then you can get to it with both hands.
