Detroit Diesel — Removal of Camshaft and Rocker Shaft/Engine Brake Assembly
Repair & overhaul
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- Loosen rocker shaft bolts from the inside bolts outward in 1/2 turn increments to prevent the rocker shaft from breaking.
Procedure
- Turn engine OFF; steam clean the engine.
- Disconnect the battery power to the engine.
- Remove air cleaner, turbocharger inlet pipe/hose, and air cleaner housing.
- Remove the rocker cover.
- Remove the two 14-pin fuel injector harness connectors.
- Using Engine Barring tool (J-46392), rotate the crankshaft to TDC on cylinder No. 1.
- Remove the Crankshaft Position Sensor (CKP).
- Install flywheel housing crankshaft TDC Locating Pin (W470589001500) into the CKP sensor hole.
- Remove the engine brake solenoids from the camshaft housing.
- Completely loosen all adjusting screws on all rocker arms.
- Loosen the seven bolts securing the intake rocker shaft; remove intake rocker shaft assembly.
- Loosen the seven bolts securing the exhaust rocker shaft; remove exhaust rocker shaft assembly.
- Remove remaining bolts from camshaft bearing caps; remove caps.
- Remove the intake and exhaust camshaft assemblies from the camshaft housing.
Tools required
- J-46392 Engine Barring tool Amazon
- W470589001500 TDC Locating Pin Amazon
- W470589044000 / W470589004000 Rocker Arm Lifter/Spacer Intake
- W470589074000 Rocker Arm Lifter/Spacer Exhaust Amazon
- J-48883 Cam Bearing Cap Puller Amazon
- J-46375 Injector Unit Pump Puller Amazon
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.