Page 310
SPECIFICATIONS
439
Figure 439 — Camshaft Cap Torque Sequence Screw Numbers
Cylinder Head
440
Figure 440 — Sealant Application Pattern — Head to Plate
Discard screws with four punch marks when removed and replace with new screws.
Step 1. Screws 1–7 25 ±3 N•m (18 ±2 lb-ft)
Step 2. Screws 11 first, 9 and 13: incrementally 90 ±5 N•m (66 ±4 lb-ft)
Step 3. Screws 8, 10, 12 and 14 60 ±5 N•m (44 ±4 lb-ft)
Step 4. Completely loosen screws 11, 9 and 13.
Step 5. Screws 11 first, 9 and 13: incrementally 60 ±5 N•m (44 ±4 lb-ft)
Step 6. Screws 1–7, angle tighten 90° ±5°
Step 7. Screws 8–14, angle tighten 100° ±5°
Remove all old sealant before attempting to apply new sealant.
Apply a 2 mm (5/64 inch) bead of MACK approved sealant to the rear end of the cylinder head following the pattern shown.
Attach the cylinder head to the timing gear mounting plate within 20 minutes of applying the sealant.
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