hey just want to thank this forum _ its has saved me tons of money _ I was intimidated when buying my 1st jag _ due to all the rumors of how expansive it was to maintenance it - but by reading & analyzing some post it really helped me do it my self so i did a video explaining on how to change The upper & lower intake manifold - spark plugs- im still having some hesitation so before i change the imt o rings & knock sensor is there anything else i can check?

 

the gap on them spark plugs was massive.