Editor’s Note: Our friends over at Driven Racing Oil produced this technical bulletin of recommended steps and products that can prevent failure and extend the life of engines using stamped steel rocker arms. To find Driven Racing Oil products at your nearest Parts Pro™ affiliate, see our Store Locator.
Many classes of racing require the use of stamped steel rocker arms, and many budget crate engines use them as well. Because stamped steel rocker arms do not feature a roller bearing pivot, they generate more friction. As a result, improper break-in and operation can dramatically shorten the life of stamped steel rocker arms.
To increase longevity, Driven Racing Oil recommends pre-lubing the inside cup of the rocker arm with Engine Assembly Grease (PN 00732). After installing the rocker arms and setting the valve lash, pour break-in oil (PN 03706) over the rocker arm assembly (16 oz per side on V8 or V6 engines). Upon start-up, bring the engine speed up to 2,800 RPM and hold steady for 10 minutes. Afterward, shut down the engine and allow it to cool down for 10 minutes. Restart the engine and bring the engine speed back to 2,800 RPM for 10 more minutes. The rocker arms are now properly broken in. To maintain proper protection, the use of synthetic motor oil is recommended (PN 03206). Conventional motor oils, even high-zinc racing oils, DO NOT provide the required friction reduction needed to properly protect stamped steel rocker arms. Endurance testing shows that synthetic motor oil reduces oil temperature, wear, and friction.
