Cylinder Head (002-004)
B3.9 and B5.9 Series Engines
Section 2 - Cylinder Head - Group 02
Lubricate the threads and under the heads on the remain-
ing cylinder head capscrews with clean lubricating engine
Install capscrews in the cylinder head and finger-tighten.
NOTE: Be sure to install the six capscrews into the holes
underneath the injectors.
NOTE: Capscrews for the 1991 and later certification level
engines are the same overall length, but have a longer
Do not use pre-1991 certification level engine capscrews
in a 1991 B Series or later certification level engine
because pre-1991 capscrews do not have enough
threads to provide enough thread engagement in the
1991 and later certification engines. Failure to do so can
result in engine damage.
Capscrews for a 1991 B Series or later certification level
engine can be used in a pre-1991 certification level
engine because 1991 and later capscrews have enough
threads to provide enough engagement in all certifica-
tion level engines.
NOTE: The top of the cylinder head capscrew is identified
with an angle marking. The cylinder head capscrews must
be tightened by using the three-step "torque plus angle"
method described as follows.
Lubricate the threads and under side of the capscrew head
of the cylinder head capscrews with clean lubricating en-
1. Follow the numbered sequence, and tighten all 26