Detroit Diesel — Installation of the 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
- Camshaft journal area is lubricated through the rocker shaft; incorrect installation damages camshaft journals and engine brakes.
- Markings on the front of the rocker shafts must face the front of the engine.
Procedure
- Verify crankshaft at TDC on cylinder No. 1 using TDC Locating Pin (W470589001500) in the CKP hole.
- Install Camshaft Timing Tool to the rear of the camshaft housing and tighten the two bolts.
- Mark the etched triangle on the camshaft gear teeth with a paint pen.
- Lubricate camshaft bearing surfaces and journals; install exhaust and intake camshaft gear assemblies.
- Align the marked gear teeth with the marks on the timing tool.
- Install the timing tool to the front of the camshaft housing into the camshaft grooves and secure with a bolt.
- Install the seven camshaft caps; replace engine brake solenoid O-rings and install solenoids.
- Install the 30 bolts to camshaft caps; finger tighten.
- Torque the M10 camshaft cap bolts to 20 N·m then 50-55 N·m.
- Torque the nine 63 mm M8 bolts to 30 N·m.
- Remove TDC Locating Pin and install crankshaft position sensor.
- Check gear lash between camshaft gear and idler gear No. 5 (0.051 - 0.257 mm).
- Remove timing tools.
- Install the intake and exhaust rocker shaft assemblies and torque bolts to 50-55 N·m +90°.
- Install fuel injectors, lash valves and engine brakes, install rocker cover, reconnect battery, prime lubrication system.
Tools required
- W470589001500 TDC Locating Pin Amazon
- W470589054000 / W470589104000 / W470589034000 Camshaft Timing Tool
- W470589044000 / W470589004000/ W4705589074000 Rocker Arm Lifter/Spacer
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- M10 camshaft cap bolts: 20 N·m (15 lb·ft) then 50-55 N·m (37-40 lb·ft)
- M8 63 mm bolts: 30 N·m (22 lb·ft)
- Rocker shaft bolts: 50-55 N·m (36-41 lb·ft) +90°
- Camshaft gear to idler gear No. 5 lash: 0.051 - 0.257 mm
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.