What should I do if a measured clearance is out of spec?
Documented on the Chevrolet Small Block 350 (sbc 350) build
Published March 28, 2026
If clearance is too tight or too loose, stop assembly.
Full Answer
If clearance is too tight or too loose, stop assembly. Options include trying a different bearing size/thickness, machining the crank journals (undersize bearings) or replacing the crank, or changing rod bearings to a different oversize/undersize as appropriate to achieve the correct clearance.
Documented In This Build
Related Knowledge
What bearing clearance should I aim for on a Small Block Chevy 350?Can I reuse the existing rod bolts?How does Plastigauge work and is it accurate enough?What torque should I use for rod bolts?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?
Related Parts
Connecting rod set (matched)
Aftermarket / stock replacement$350
Rod bearing set (standard size)
King / Clevite / Generic$60
Rod bolts (ARP 2000 style)
ARP$120
Assembly lube
Lucas / ARP / Aeroshell$12
Plastigauge pack
Plastigauge$8
Related Tools
Socket set and ratchetGeneric
Engine standGeneric
Torque wrenchGeneric / Tekton 3/8" drive, 10-80 ft-lb
PlastigaugePlastigauge Standard
Feeler gauges / dial caliperMitutoyo / Craftsman (example)
Small brush or finger stick for 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. 8 | Installing Camshaft and timing components
Small Block Chevy 350 Build Pt.1 | Lifting This Engine Without Breaking It