Thanks for the replies. I want to test to see if I have any issues with worn piston rings, leaking valves, head gasket etc. as I am getting smoke through dip stick after recently servicing the PCV system (twice). But it dose pass the glove test!
I found this Gunson 4101 tester for £20 in cpc.farnell which should fit with the 14mm thred on the hose.
https://cpc.farnell.com/gunson/4101/...ter/dp/CP01082