Tapping from top end?

[impact240sx]

I just took my sr out to put brian crower cams, rocker arm stoppers, and an exhaust manifold. Now when its idleing there is a tapping that i believe is coming from around the head area. I'm running only dump tube so it might be the exhaust confusing me but i'm gonna put my down pipe on later. But do the rocker arm stoppers tap the rockers? thats what my best guess is but i don't know if they're supposed to do that.

And yes i searched and nobody said anywhere that the ras is supposed to or not supposed to tap.Thanks.

[redtop91]

It's most likely your lifters ticking. There is a walkthrough on this site for bleeding them to stop the ticking.