Operation and maintenance manual

Overhead Set QSB4.5 and QSB6.7
Page 8-6 Section 8 - Maintenance Procedures at 5000 Hours or 4 Years
If equipped, at the rear of the rocker lever cover, install
the banjo bolt and sealing washers connecting the
breather oil drain line to the rocker lever cover.
Torque Value: 12 N•m [ 106 in-lb ]
Not all engines with an internal mounted crankcase
breather are equipped with an external breather oil drain
line. On some engines the breather oil drain line is internal
to the breather connection tube (1).
Prior to connecting the breather connection tube to the
rocker lever cover, apply clean engine oil to the o-ring
located on the breather tube connection.
Connect the breather tube connection to the rocker lever
cover.
In general, two types of breather tube connections are
used at the rocker lever cover:
• A clamping plate and capscrew hold the breather tube
connection to the rocker lever cover. Install the
capscrew and clamping plate to connect the breather
tube connection to the rocker lever cover.
• One or two capscrew(s) directly mount the breather
tube connection to the rocker lever cover. Install the
capscrew(s) to connect the breather tube connection
to the rocker lever cover.
Tighten the Capscrew(s).
Torque Value: 10 N•m [ 89 in-lb ]
Some breather tube connections use internal Torx™
capscrews to secure the breather tube connection to the
rocker lever cover.