Yanmar 4BY - Installation of Camshafts

ENGINE
BY Service Manual
5-57
Camshaft and Timing Gear Train
Figure 5-96
18. Remove camshaft sprocket (Figure 5-96, (2))
from chain (Figure 5-96, (1)) as shown by
arrow.
Figure 5-97
19. Evenly loosen all camshaft bearing cap bolts
(Figure 5-97, (1)) in 1/2-turn increments,
working from each end towards the center.
IMPORTANT
Camshaft bearing caps are numbered and
must be installed in their original locations.
20. Remove all bearing caps.
21. Remove the intake (Figure 5-97, (2)) and
exhaust (Figure 5-97, (3)) camshafts.
Figure 5-98
IMPORTANT
NEVER remove bolts retaining loop casting
(Figure 5-98).
Installation of Camshafts
1. Lubricate all camshaft bearings, caps and
journals with clean engine oil.
Figure 5-99
2. Identify the intake (Figure 5-99, (E)) and
exhaust (Figure 5-99, (A)) camshafts.
(
3
)
(
1
)
(
1
)
(
2
)
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