Having rebuilt my 3.8 engine and got it test running the other week all seemed good but there is an additional mild clattering/tappety sounding noise
I left it overnight, removed the cam covers and then measured the gaps, which were around 7/8 thou on the inlet and 8-9 thou on the outlet side...so around 3/4 thou over spec
I am waiting for a reply from the guy who built the head, but in the meantime wondered if you might have some thoughts as to what is making this noise (hopefully you can hear it) and if it could be anything else other than the gaps
Thanks
Jonathan