S
TIGHTENING SEQUENCES
Use the correct view and direction
← FRONT
Driver-side cylinder head
STANDARD BOLTS59 lb-ft + 90° + 60°
#9 SHORT BOLT59 lb-ft + 90° + 40°
9SHORT5137106248
#9 · SHORT INTERNAL-HEX BOLTGM 11611976 · use the 40° final-angle procedure shown above
→ FRONT
Passenger-side cylinder head
ALL HEAD BOLTS59 lb-ft + 90° + 60°
73159842610
← FRONT
Intake manifold
PASS 144 lb-in
PASS 288 lb-in
10415876239
Oil pan
INSIDE → OUTSIDEBLOCK / FRONT COVER18 lb-ft
REAR-HOUSING CROSS BOLTS106 lb-in
LOWER PAN88 lb-in
Tighten the main upper-pan fasteners from the inside outward, then use the matching value above for each fastener group.
TORQUE / ANGLE TOOLS
These are the torque-angle wrenches used and recommended for this reference. Standalone angle adapters can also work; no specific budget adapter is being endorsed here.
Head and intake order cross-checked against the 2014+ LT sequence diagrams published by Michigan Motorsports. Diagrams are redrawn for clarity; front-of-engine direction is explicit.