How do I set lifter preload or hydraulic lash?
Documented on the Chevrolet Small Block 350 (sbc 350) build
Published March 28, 2026
For hydraulic rollers, preload is typically set by tightening the rocker arm to recommended torque with the lifter on the base circle, then turning the pushrod/nut to achieve the specified preload (or follow the manufacturer's procedure).
Full Answer
For hydraulic rollers, preload is typically set by tightening the rocker arm to recommended torque with the lifter on the base circle, then turning the pushrod/nut to achieve the specified preload (or follow the manufacturer's procedure). For hydraulic flat tappets, follow the valve adjustment procedure specific to the lifter and rocker setup.
Documented In This Build
Related Knowledge
How important is degreeing the cam?What torque sequence and values should I use for SBC heads?What should I do to prepare the engine for first start and break-in?Do I need ARP head studs or are stock head bolts okay?What torque should I use on the crankshaft bolt?How do you test an oil pump on the bench?What is the acceptable rod bearing clearance for a Small Block Chevy 350?How accurate is Plastigage for measuring bearing clearance?
Related Parts
Head gaskets (MLS)
Fel-Pro (typical)$120
ARP head studs/bolts
ARP$90
Timing set (chain and gears)
Cloyes (typical)$80
Oil pump
Melling (typical)$60
Intake manifold
Edelbrock (Performer typical)$300
Carburetor (4-barrel)
Holley (typical)$250
Pushrods
$45
Lifters (roller or hydraulic)
$120
Harmonic balancer / crank pulley
$75
Valve cover gaskets
Fel-Pro (typical)$20
Misc gasket and seal kit (timing cover, oil pan, front seals)
Fel-Pro (typical)$80
Rocker arms
Comp Cams (typical)$140
Related Tools
Torque wrenchSnap-on (example)
Engine degree wheel and dial indicator
Engine stand
Feeler gauges
Camshaft/valve spring compressor (if needed)
Assembly lubeMotor Medic / Royal Purple (examples)
Impact wrench / breaker bar
Related Videos
Small Block Chevy 350 Build Pt.3 | Filing rings and checking main clearances
Small Block Chevy 350 Build Pt.5 | Continued frustrations with rod clearances
Small Block Chevy 350 Build Pt. 11 | Installing the intake manifold and figuring out sbc nuisances
Small Block Chevy 350 Build Pt. 7 | Checking Crank Clearance and installing the rods.
Small Block Chevy 350 Build Pt. 8 | Installing Camshaft and timing components
Small Block Chevy 350 Build Pt.1 | Lifting This Engine Without Breaking It