Engine Assembler how-to
How to Torque Cylinder Head Bolts in Sequence
Sequence prevents warping.
Quick answer
Sequence prevents warping. In short: clean; oil; hand-tighten, then complete the remaining steps below.
Step by step
Clean threads.
Oil threads if specified.
Hand-tighten all.
Follow the sequence.
Torque in stages.
Final torque or angle.
Safety reminders for engine assemblers
- Use hoists for heavy parts
- Wear PPE
- Keep hands clear of rotating parts
- Follow lockout/tagout
Key terms
Torque spec · Torque sequence · Clearance · Plastigage · Crankshaft · Piston: see the full engine assembler glossary.