If you are setting the lash like that I'm assuming that you have solid lifters.

Are you sure that it is really a lifter ticking? Sometimes the fuel pump cam follower makes a noise that is very close to that, or you have some teeth on the timing gears that are chewed up. It could even be the points in the distributor or the rotor whacking a cap tower that is too high.

If it is really a valve, don't give in to the temptation to tighten it up beyond spec. You will greatly shorten the service life of the valve seats if you do. Slightly ticky valves are the correct setting on non-hydraulic lifters. They will not ruin anything by ticking.

My 261 has a pretty noisy valvtrain. I noticed a big differance by switching to a differant oil. I was using Valvoline 10W-40 and I switched to Chevron Delo 400 15W-40 and it has made a huge differance in valve train noise. Much quieter. It also smokes a bit less. I have leaky valve seals.


Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic.