5. Tighten the four cylinder head bolts.
a. Following sequence shown, alternately turn each
cylinder head bolt until finger tight.
b. Following the same sequence, tighten the cylinder
head bolts to 120-144 in-lbs (13.5-16.2 Nm).
c. Continuing the same sequence, tighten each bolt to
15-17 ft-lbs (20.3-23.0 Nm).
d. See Figure 3-41. Using a grease pencil, mark a
straight line on the cylinder head bolt continuing the
line over onto the cylinder head.
e. Using the marks as a guide, turn each bolt 1/4 turn
or 90 degrees. Be sure to tighten the cylinder head
bolts in the sequence shown in Figure 3-40.
Figure 3-41. Final Tightening for Cylinder Head Bolts
NOTES
• For best results, use SNAP-ON TORQUE ANGLE GAUGE
TA360.
• Even though all bolt holes (rocker housing, rocker arm
support plate and breather assembly) may appear to be
in alignment, the rocker housing gasket may be installed
upside down. An upside down gasket will result in an open
breather channel causing a major oil leak when the vehicle
is started, possibly resulting in engine and/or property
damage.
• On front cylinder head, install side of gasket marked "front"
facing up. On rear cylinder head, install side of gasket
marked "rear" facing up.
6. See Figure 3-42. Install a new rocker housing gasket on
the cylinder head. Verify that the rocker housing gasket
covers the breather channel.
2008 Dyna Service: Engine 3-37
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