Detroit Diesel — Camshaft and Rocker Shaft Assemblies Removal
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Ensure when loosening the rocker shaft bolts that the bolts are loosened from the inside bolts outward in 1/2 turn increments. The increment procedure needs to be followed to prevent the rocker shaft from breaking.
- The engine brake solenoids do not have to be removed unless damaged.
Procedure
- Steam clean the engine.
- Remove pipe, air cleaner and turbocharger inlet hose.
- Remove air cleaner housing.
- Remove eight bolts from air cleaner bracket and remove bracket.
- Remove nineteen bolts from rocker cover and remove rocker cover.
- Remove the injector harness.
- Rotate the engine to top dead center (TDC) on cylinder No. 1.
- Remove the Crankshaft Position Sensor (CKP) from the rear of the flywheel housing.
- Install flywheel housing TDC locating pin (W470589001500) into the CKP hole located in the rear of the flywheel housing.
- Loosen the seven bolts securing the intake rocker shaft to the camshaft caps.
- Using rocker arm lifter spacer tool (W470589004000), remove the intake rocker shaft assembly.
- Loosen the seven bolts securing the exhaust rocker shaft to the camshaft cap.
- Using rocker arm lifter spacer tool (W470589004000), remove the exhaust rocker shaft assembly from the camshaft cap.
- Remove the remaining bolts from the camshaft caps and remove with J-48883.
- Remove the intake and exhaust camshaft assemblies from the camshaft housing.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.