What torque should I use on the crankshaft bolt?
Documented on the Chevrolet Small Block 350 (sbc 350) build
Published May 25, 2026
Torque specifications vary by crank bolt and application; follow the manufacturer or parts supplier spec for your SBC 350 crank bolt (many aftermarket bolts require a torque plus an angle).
Full Answer
Torque specifications vary by crank bolt and application; follow the manufacturer or parts supplier spec for your SBC 350 crank bolt (many aftermarket bolts require a torque plus an angle). If unsure, consult the bolt manufacturer or a factory manual.
Documented In This Build
Related Knowledge
How do you test an oil pump on the bench?Should I replace the crankshaft seal when installing the balancer?What are signs of a bad harmonic balancer?How important is degreeing the cam?What torque sequence and values should I use for SBC heads?How do I set lifter preload or hydraulic lash?What should I do to prepare the engine for first start and break-in?What is the acceptable rod bearing clearance for a Small Block Chevy 350?
Related Parts
Harmonic balancer (damper)
$90
Oil pump (mechanical)
Melling (typical aftermarket)$120
Crankshaft key (Woodruff or rectangular key)
$5
Crankshaft bolt
$10
Front crankshaft seal
$15
Related Tools
Torque wrench
Harmonic balancer installer (press/driver style)
Socket set and breaker bar
Electric drill (for bench-priming oil pump)
Bench vise or pump test fixture
Oil catch container and hoses
Clean rags and assembly lube
Related Videos
Small Block Chevy 350 Build Pt. 6 | This Is How It's Actually Supposed To Be Done
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