The Stovebolt Site Forums The Shop Area Engine Shop should a 1957 6 cyl sound like a sewing machine?

HE = 4000 series or other truck with RPO 227 - heavy duty clutch

It is an engine that came in a 3100-3800 1957 truck engine with the heavy duty clutch option. It would have had mechanical/solid lifters.

Here is the Stovebolt.com Tech Tip for adjusting valve lash.

Here is another explanation for adjusting valve lash.