Detroit Diesel — Setting the Engine Brake Lash
Adjustments
From a Detroit Diesel service manual — check it applies to your exact model before use.
Procedure
- Set the lash on all exhaust adjusting screws first.
- Rotate the engine until a given cylinder is at maximum intake lift.
- Lash the engine brakes in the firing order; one, five, three, six, two, then four.
- Set the lash between the engine brake rocker arm adjusting screw and the actuator piston stem to 4.1 mm (0.1614 in) using Engine Brake Adjustment tool W470589022300.
- Lash the engine brakes in the firing order 1, 5, 3, 6, 2, and 4.
- Torque the locknut valve adjusting screw to 50 N·m.
- Install the rocker cover and reconnect battery power.
Tools required
- W470589022300 Engine Brake Adjustment tool Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Engine brake lash: 4.1 mm (0.1614 in)
- Locknut: 50 N·m (37 lb·ft)
Source: Detroit Diesel service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.