Detroit Diesel — Installation of the Camshaft and Rocker Shaft Assemblies
Installation
From a Detroit Diesel service manual — check it applies to your exact model before use.
Before you start
- The camshaft caps are numbered and need to be installed correctly.
- The camshaft journal area is lubricated by oil that has to travel through the rocker shaft. If the rocker shaft is installed incorrectly, oil passages do not line up.
- Ensure when tightening the rocker shaft bolts that the bolts are drawn down from the inside bolts outward in 1/2 turn increments, before final torque. If the rocker shaft bolt is fully torqued without using the increment procedure the rocker shaft can break.
Procedure
- Verify that the crankshaft is at top dead center (TDC) on cylinder No.1 using tool (W470589001500) installed in CKP hole.
- Remove flywheel housing TDC locating pin (W470589001500) from CKP sensor hole in the rear of the flywheel housing.
- Install camshaft timing tool (W470589024000) to the rear of the camshaft housing. Tighten the two bolts.
- Locate the etched triangle on the camshaft gear teeth and mark the teeth with a paint pen.
- Lubricate the lower camshaft bearing surfaces and camshaft journals before installation of the camshafts. Install the exhaust and intake camshaft gear assemblies onto camshaft housing caps.
- Align the marked gear teeth with the marks on the timing tool.
- Install timing tool (W470589024000) to the front of the camshaft frame and into the grooves cut into the camshafts. Secure timing tool to the camshaft with a bolt.
- Verify that the marks on the gear teeth match the marks on the timing tool.
- Install a dial indicator onto gear case and zero out the dial indicator. Position the stem between the teeth on the camshaft gear. Hold the No. 5 idler gear with a screw driver. Check the lash.
- The dial indicator should read 0.051 - 0.257 mm (0.002002 - 0.01010 in.).
- Install the seven camshaft caps onto intake and exhaust camshafts.
- Replace the O-rings on the solenoid prior to reinstallation. Install the engine brake solenoid.
- Install the 28 bolts to camshaft caps; finger tighten the bolts.
- Torque fourteen 120 mm M10 camshaft cap bolts and seven 108 mm M10 bolts to 20 N·m (15 lb·ft) and then torque to 50 - 55 N·m (37 - 40 lb·ft) using torque sequence shown in Figure 6. Torque the seven 6
- Using tool (W470589004000), install the assembled intake and exhaust rocker arm assemblies to the camshaft cap. Torque the bolts to 55 - 60 N·m (41 - 44 lb·ft) 90 degrees. Install injectors and harnes
Tools required
- W470589024000 Amazon
- W470589001500 Amazon
- W470589004000 Amazon
- J-48883 Amazon
- dial indicator Amazon
- screw driver Amazon
- paint pen Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 0.051 - 0.257 mm (0.002002 Amazon eBay - 0.01010 Amazon eBay $80.00 in.)
- 20 N·m (15 lb·ft) then 50 - 55 N·m (37 - 40 lb·ft)
- 30 N·m (22 lb·ft)
- 55 - 60 N·m (41 - 44 lb·ft) 90 degrees
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.