I have two of the ZZ430 engines ( #216 and #430 ) and both were noisy. One is in my 32 Roadster and the other is in my 32 Ford 3W project.

I just installed the 3W body yesterday ... for the last time ...



I just adjusted my engines with the engine running ... like you would any hydraulic lifter engine. Back the rocker adjustment off until it clicks and then tighten. When the clicking STOPS ... I went another 3/4 turn. I have a valve cover with the top cut

50 weight oil is heavier and thicker ... so it would quieten things a little ... but I prefer to use the original factory recomended Mobile One ...

Did you get the matching number Hat, jacket and paperwork with your ZZ430 ?