It does. This will be investigated in due course.
-- -- --
Off with its head!
Nothing immediately obvious like a seat hanging half out the head, though I'm going to do a leak down test on all of these later today to see how well (or not) the rest are sealing.
Can't pull the valve yet because I realised that I lent my valve spring compressor to someone about 15 years ago and never saw it again. Have one arriving tomorrow.
Here's a closer look at number 5.
Then it's neighbour number 7 which I know was firing just fine.
It does look like the intake valve on 5 isn't seated quite as deeply as on 7. We'll get a better look when I pull the valve.
There's a bit of tarnishing in the cylinder, but I've seen (and run) worse.
I am slightly suspicious as to whether this gasket had sealed properly.
Especially around here.
Just surprised to see that much surface oxidation given it's something meant to be clean, then sandwiched up against a gasket...unless whoever put it together last time just chucked it together without cleaning anything.
I did notice what appears to be a 2019 date code.
Which if it is indeed a date code suggests someone has been in here relatively recently. Which probably explains why the exhaust manifold just unbolted without any hint of protest.
Speaking of gaskets, there will be a slight delay before things go back together (obviously investigation of my issue and cleaning will take a bit of time anyway). Spot the deliberate mistake.
Yeah... someone managed to order gaskets for a two rather than three row head...despite checking three times. I do despair at my mental capacity sometimes.