I know this is a long shot, but I’ve just bought a compression tester, but it has ends like in the below pictures. Unfortunately the plugs are buried deep in the Cossie head, so I need some sort of extension to go into the sparkplug hole, and will protrude out of the head so I can attach the compression tester.

I just wanted to know if there is some sort of standard tubular extension available, before I rush off to my local machine shop to make one up.

Thanks
John

 

if its like mine its just long enough to screw in and the guage just pokes out the top

 

as above i got one from halford's & works ok

 

Thanks for the replies, but how do you guys tighten the nut, or do you just do it up finger tight? The nut has to be tight, as there shouldn’t be any leakage past the “O” ring, other wise this will give a false reading?

Thanks
John

 

Well mate .. As most heads you are going to compression test will have a clean spark-plug seat, you'll find that the O-ring on the tester will seal fine when you screw in finger-tight ... especially if you grease a little first. Been using mine for years like this.