Definition
A stable valvetrain prevents valve float at high rpm.
Upgraded springs and retainers are required when increasing redline or cam aggressiveness.
Automotive Wiki
Engine
Valvetrain
The assembly of valves, springs, retainers, rockers, and camshaft that controls cylinder breathing.
Related terms
- PistonA cylindrical component that moves up and down inside the cylinder, transferring…
- CrankshaftThe main rotating shaft that converts reciprocating piston motion into rotationa…
- CamshaftA shaft with lobes that open and close intake and exhaust valves at precise timi…
- Cylinder HeadThe top section of the engine housing valves, ports, and often the combustion ch…
- Engine BlockThe main structural casting that houses cylinders, crankshaft bearings, and ofte…
- Timing BeltA toothed belt synchronizing crankshaft and camshaft rotation in many overhead-c…
Category: Engine · Updated August 31, 2026