Posted on March 14, 2024 Series 50 – Section 12 Engine Tune-Up Section 12 Engine Tune-Up 12.1 Engine Tune-Up Procedures 12.2 Valve Lash, Injector Height (Timing) and Jake Brake ® Lash Adjustments 12.3 Engine Tune-Up Procedures for the Series 50G Engine 12.4 Valve Lash for the Series 50G Engine