Compression test results on '67 +2

[Johnfm]

I checked all the tight ones - I basically did them twice.

Sadly, they are thight.

I check head bolt torque too before measuring. I guess they probably haven't been done for a long time.

[Craven]

Hi.
With tight clearance on No1 I would budget for new cam bearings!
A tip you may find useful. Set up cam wheel marks as manual then tie wrap both wheels to the chain before undoing anything.
For what it?s worth.
Ron.

[Johnfm]

If tight clearance on #1 might indicate worn cam bearings (presumably at the front) why wouldnt't other clearances be similarly tight?

Can I also assume that, though not ideal, this tight clearance isn't necessarily going to cause any destruction? Or is this a 'do not run the engine until adjusted' problem?

[Chancer]

You can be sure that the tight clearances will not affect your compression readings in anything other than a theoretical and de minimis manner.

The clearances will reduce slightly when hot thus if they are too small there is a risk of burning out valves/seats, best to check them when hot to be sure.