Knock and smoke

I remember we didn't use lock tight b/c the cam had a key way for the timing chain sprocket.

Even with the sprocket being keyed, you still need the locktight to hold the bolt in place-trust me I learned this the hard way.
If you pull the intake and the edges of the cam lobes and lifters are chipped up at all this is a very good sign the cam has been walking back and forth due to the bolt not being tight.