So my engine 2.5 V6 has a slight tappet clacketty clack noise, not too loud. I took off the valve covers and adjusted the exhaust valve clearances to .009 between the cam and tappets, I didn't bother checking the intakes being the intakes cannot be adjusted without shims. Is this noise normal being everything is aluminum, I have solid lifters and sound travels right through it. Its not the injectors, I know what those sound like. Do all your Alfa's have any faint lifter noises? Is this normal?