Push Rod

Key Features:

• Hollow or solid cylindrical design for lightweight strength

• Precision-length to maintain proper valve clearance

• Hardened ends to withstand constant cam contact

Functions:

1. Transfers camshaft lobe action upward to rocker arms

2. Maintains precise valve timing in OHV configurations

3. Operates at engine speed (up to 3,000+ cycles/minute)

Common in V8 and performance engines, push rods require periodic inspection for:

• Length tolerance wear

• Bending from valve float

• Tip wear patterns

While largely replaced by overhead cam designs, push rod systems remain valued for their simplicity, compactness, and reliability in many applications.