So came to test compression yesterday, could only test cylinders 2-4 as the tester won't bite the thread of the first cylinder.
Not sure what the piece of metal i got out is, or what's around the plug.
A mate reckons it's been helicoiled before but I've never seen that so cannot confirm.
Biggest variance is between cylinders 3&4 as shown. Bit of a large drop...
What even is this?
Remains of the plug.
Grimy ass cylinder
