Cylinder Head and Valves
02
020
59
RG,RG34710,96 –19–28NOV00–1/2
Torque-Turn Cylinder Head Cap Screws
RG8346 –UN–09DEC97
Torque-Turn Cylinder Head Cap Screws
A—Front of Engine
Arrow (A) points toward front of engine.
IMPORTANT: DO NOT use multi-viscosity oils to
lubricate cap screws.
1. Lubricate cap screws with clean SAE 30 engine oil and
install in their proper locations as outlined previously.
2. If not done, initially tighten cap screw No. 17 to
specification to prevent head from tipping during
tightening sequence.
Specification
Step 1—Cylinder Head No. 17
Cap Screw—Initial Torque 100 N•m (74 lb-ft)............................................
Following figure on previous page, sequentially start at
cap screw No. 1 and proceed through cap screw No. 26
and tighten all cap screws to 163 N•m (120 lb-ft).
Specification
Step 2—All Cap Screws (Nos.
1—26)—Initial Torque 163 N•m (120 lb-ft).................................................
3. Wait 5 minutes and verify above torque.
Specification
Step 3—Verify All Cap Screws
(Nos. 1—26)—Torque 163 N•m (120 lb-ft).................................................
4. Using an oil-proof pen, pencil, or marker, draw a line
parallel to the crankshaft across the entire top of each
cap screw head. This line will be used as a reference
mark.
IMPORTANT: If a cap screw is accidentally tightened
more than 90° in first sequence, DO
NOT loosen cap screw but make
adjustments in the next tightening
sequence.
5. Sequentially (start at cap screw No. 1 and proceed
through cap screw No. 26) turn each cap screw 90°.
Line on top of cap screw will be perpendicular to
crankshaft.
CTM100 (06APR04)
02-020-59
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=131
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