Remove And Install Timing Chain; Install Timing Case Cover - Yanmar BY Series Service Manual

Camshaft and Timing Gear Train
12/05

Remove and Install Timing Chain

1. Remove timing case cover. See Remove
Timing Case Cover on page 5-48.
2. Compress chain tensioner rail
(Figure 5-87, (3)) and retain with special tool
OEM No. 11 3 340 (Figure 5-87, (1)).
Figure 5-87
Figure 5-87
3. Remove tensioner rail (Figure 5-87, (3)) and
guide rail (Figure 5-87, (4)).
4. Remove nut (Figure 5-87, (2)).
BY Service Manual
5. Remove high-pressure pump sprocket using
special tool OEM No. 13 5 191. See Replace
High-Pressure Fuel Pump on page 6-15.
6. Remove sprockets and timing chains.
7. Install lower chain on sprockets and install as
an assembly.
8. Install nut (Figure 5-87, (2)) and tighten to
65 N·m (48 ft-lb).
9. Install tensioner rail and guide rail. Remove
retainer (Figure 5-87, (1)).
10. Install timing case cover. See Install Timing
Case Cover on page 5-49.

Install Timing Case Cover

Note: The front crankshaft seal must be
installed with the timing case cover
installed.
1. Thoroughly clean all old gasket material from
mating surfaces.
2. Check condition and location of alignment
dowel sleeves.
Note: Only a one-piece gasket is available for
timing case cover and water pump.
When repairing timing chain cover only,
detach seal at marked points.
© 2009 Yanmar Marine International
ENGINE
5-49