TM 5-2420-230-24-2
Cylinder Head (002-004)
B3.9 and B5.9 Series Engines
Page 2-14
Section 2 - Cylinder Head - Group 02
Lubricate the threads and under the heads on the remain-
ing cylinder head capscrews with clean lubricating engine
oil.
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
threaded area.
CAUTION
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.
CAUTION
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-
gine oil.
Step 1
1. Follow the numbered sequence, and tighten all 26
capscrews.
Torque Value: (Step 1) 90 Nm
[66 ft-lb]
L-810
