4.0 L. Engine with strange noise.

Hi everyone.

My 4.0 L. engine makes a strange noise some kind of clicking or slamming like too
much clearance on valves and that can't be that 'cause there is no adjustment on
this engine.Somewhere in your forum you were talking about the evap (purge) valve
on the left side of the engine and i replaced it but the problem still exist .I even tie
the valve on other hose instead of fixing it on the engine head like you said and the
noise is stille there.

Any idea ?