Page 488
SPECIFICATIONS
SPECIFICATION FOOTNOTES
NOTE 1 — AUXILIARY SHAFT GEAR
RETAINING NUT INSTALLATION
앫 A new nut has pre-applied thread locker. No
degreasing of a new nut is recommended.
However, degrease the shaft threads
thoroughly with Loctite
®
Primer-T, or
equivalent, prior to nut installation.
앫 It is acceptable to reuse an auxiliary drive
gear retaining nut. If reusing a nut, the nut
threads, as well as the shaft threads, must
also be thoroughly cleaned with Loctite
®
Primer-T, or equivalent. Then, apply
Loctite
®
271 or 277 on the nut and shaft
threads.
앫 Whether using a new or revised nut, it is
critical that the ground face of the nut (if
applicable) be installed toward the gear. Any
identifications on the nut face must be
installed away from the gear.
NOTE 2 — MAIN BEARING CAP
INSTALLATION
Main bearing cap assembly shall be performed in
the following steps:
1. Buttress screws installed finger-tight in order
to align the hole in the block and the hole in
the main bearing cap.
2. Main bearing capscrews torqued.
3. Buttress screws torqued.
NOTE 3 — CYLINDER HEAD TORQUING
Cylinder head assembly and torquing is to be
performed as follows:
1. Oil all cylinder head capscrew bosses,
capscrew threads and washers with clean
engine oil prior to assembly. Do not oil
threads in the cylinder block. Using torque
wrench J 24407, or equivalent, tighten the
capscrews to specification in three stages
on any one head in the proper sequence, as
shown in the “Engine Reassembly”
procedures section.
a. Initially, torque all capscrews in
sequence to 50 lb-ft (68 N폷m).
b. Tighten all capscrews in sequence to
125 lb-ft (170 N폷m).
c. Tighten all capscrews in sequence to
the final torque value of 205 lb-ft
(278 N폷m).
2. After completing the run-in procedure, in
sequence, back off each capscrew
individually until free. Then, retorque the
same capscrew to 205 lb-ft (278 N폷m).
NOTE 4 — EXHAUST MANIFOLD TORQUING
On some engines, the exhaust
manifold-to-cylinder head stud hole may be
drilled deep enough to allow the stud to enter the
push rod bore. In these instances, the 20 lb-ft
(27 N폷m) torque may not be reached until the stud
contacts the push rod. In all cases, a stud
protrusion of 1.75 inches (44.45 mm) must be
maintained.
1. Oil the nut threads and flanges with clean
engine oil and install the 12 retaining nuts.
2. Tighten the nuts in two stages per the
following sequence:
앫 First stage — 50 lb-ft (68 N폷m)
앫 Second stage — 100 lb-ft (136 N폷m)
5-111.bk Page 488 Monday, July 10, 2006 2:26 PM
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