If you're hearing a clicking sound coming from under the hood, it's probably time to look at your 350 chevy valve adjustment sequence and get those rockers dialed in. Dealing with a Small Block Chevy is a rite of passage for most gearheads, and while these engines are legendary for being tough, they aren't magical. They need a little maintenance to keep that classic rumble smooth and powerful. If your valves are too loose, you get that annoying sewing machine clatter and lose lift. If they're too tight, you risk burning a valve or ending up with a rough idle that makes the whole truck shake.
Getting the sequence right is the difference between an afternoon of satisfying garage work and a week of chasing mysterious misfires. You don't need a degree in mechanical engineering, but you do need some patience and a decent feel for how mechanical parts fit together.
Why the sequence actually matters
Most 350 Chevys out there are running hydraulic lifters. These are pretty forgiving because they use oil pressure to take up the slack, but they still have a specific operating range. You can't just tighten the rocker nuts until they "feel right" and hope for the best.
The 350 chevy valve adjustment sequence ensures that you are adjusting each valve when the lifter is sitting on the "base circle" of the camshaft. If you try to adjust a valve while the cam lobe is already pushing it up, your settings will be way off the second the engine starts turning. By following a specific order, you save yourself the headache of rotating the engine back and forth a dozen times.
Getting the engine ready
Before you even touch a wrench to a rocker arm, you've got to get the engine in the right spot. For a static adjustment (which is way cleaner than doing it while the engine is running), you want to start at Top Dead Center (TDC) on the compression stroke for cylinder number one.
To find this, pull the spark plug out of the first cylinder (front one on the driver's side). Stick your finger over the hole—not in it, just over it—and have a buddy turn the crank bolt with a big socket. When you feel air pushing your finger away, you're on the compression stroke. Look at the timing tab on the harmonic balancer and line up the "0" mark with the notch on the balancer. Now you're ready to start the first half of the 350 chevy valve adjustment sequence.
The two-step static adjustment method
A lot of guys will tell you to adjust each cylinder one by one following the firing order (1-8-4-3-6-5-7-2). You can do that, but it takes forever. The more efficient way—the way the pros usually do it—is the two-step method. This allows you to hit half the valves at TDC, rotate the crank exactly one full turn, and then hit the other half.
Part one: TDC Cylinder #1
With the engine at TDC for cylinder #1, you can adjust the following valves: * Intake valves: Cylinders 1, 2, 5, and 7 * Exhaust valves: Cylinders 1, 3, 4, and 8
It helps to mark these off on a piece of cardboard or a notepad as you go. There's nothing worse than getting halfway through and forgetting if you already did the exhaust on number four.
Part two: TDC Cylinder #6
Once those first eight are done, grab your breaker bar and rotate the crankshaft exactly 360 degrees (one full turn). The "0" mark on the balancer should line up with the timing tab again. Now the engine is at TDC for cylinder #6. From here, you can finish the 350 chevy valve adjustment sequence by hitting the remaining valves: * Intake valves: Cylinders 3, 4, 6, and 8 * Exhaust valves: Cylinders 2, 5, 6, and 7
The secret to finding zero lash
This is where most people mess up. "Zero lash" is the point where all the slack is gone from the valvetrain, but the lifter plunger hasn't started moving down yet.
The old-school trick is to spin the pushrod between your thumb and forefinger while slowly tightening the rocker nut. The moment you feel even a tiny bit of resistance or "drag," you've hit zero lash. However, if you've got a lot of oil on your hands or if the lifters are brand new and dry, it's easy to overshoot this.
A better way is to move the pushrod up and down. Wiggle it vertically. As you tighten the nut, that vertical play will disappear. The exact second that the "clink-clink" movement stops, you are at zero lash. This is much more precise than the spinning method, especially for beginners.
Setting the preload
Once you've found zero lash, you need to set the "preload." This pushes the lifter plunger down into its sweet spot. For a standard street-driven 350 Chevy, most people go half a turn to one full turn past zero lash.
If you're building a high-revving engine, some guys prefer a quarter-turn to keep the lifters from "pumping up" at high RPMs, but for a daily driver or a cruiser, a half-turn is usually the gold standard. It's quiet, reliable, and keeps the engine happy. Just make sure you do the same amount for every single valve. Consistency is key here.
The "engine running" method (The messy way)
If the static method sounds too complicated or if you just can't seem to get the "feel" for zero lash, you can do this while the engine is actually running. Fair warning: it's going to spray oil everywhere unless you have a set of "cut-out" valve covers or clips to block the oil holes in the rockers.
With the engine idling, loosen a rocker nut until it starts to clatter. Then, slowly tighten it until the clatter just barely disappears. That's your zero lash. From there, tighten it another half-turn in small increments. The engine might stumble for a second as the lifter adjusts, but it should smooth back out. It's messy, it's hot, and you'll probably burn your knuckles on a header, but it's a foolproof way to know the valves are set right.
Common mistakes to avoid
One of the biggest blunders is trying to adjust the valves on a stone-cold engine that hasn't run in months. Ideally, the engine should be somewhat warm, or at least have had oil circulated recently so the lifters are "primed." If the lifters have bled down (meaning they're empty of oil), you might accidentally tighten the nut too far, and when the engine starts and oil pressure builds, the valves won't close all the way.
Also, don't rush the rotation. When you're moving from the first set of valves to the second, make sure you go exactly 360 degrees. If you're off by a bit, you might be adjusting a valve that's already starting to open, which ruins the whole 350 chevy valve adjustment sequence.
Finishing up and testing
After you've gone through the whole 350 chevy valve adjustment sequence, double-check your work. Take a look at the threads showing on the rocker studs. They should all look roughly the same height. If one nut is buried way deep and another is barely hanging on, you definitely missed something.
Put your valve covers back on with fresh gaskets—don't be that guy who reuses old, crushed cork gaskets—and fire it up. It should sound crisp. A tiny bit of lifter tick for the first few seconds is normal as the oil pressure stabilizes, but it should go quiet quickly. If it sounds like a bag of marbles, shut it down and re-check your zero lash.
Taking the time to master this sequence makes you much more self-reliant as a Chevy owner. It's one of those fundamental skills that turns a "part changer" into a real mechanic. Once you get the rhythm down, you'll be able to knock this out in less than an hour, and your Small Block will thank you with a smoother idle and much better throttle response.