Volvo Penta — Cylinder head tightening (61 and 71 series)
Adjustments · Cylinder head bolts
From a Volvo Penta service manual — check it applies to your exact model before use.
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Before you start
- Cylinder head bolts must be dipped completely (including bolt heads) in a rustproofing compound a maximum of 24 hours prior to assembly.
- The bolts should not drip at all when fitted.
Procedure
- 1st tightening: 30 Nm (3 kpm/21.7 lbf.ft) in numbered sequence.
- 2nd tightening 61 series: 85 Nm (8.5 kpm/61 lbf.ft) in numbered sequence.
- 2nd tightening 71 series: 90 Nm (9 kpm/65 lbf.ft) in numbered sequence.
- 3rd tightening 61 series: 85 Nm (8.5 kpm/61 lbf.ft) in numbered sequence (torque check).
- 3rd tightening 71 series: 90 Nm (9 kpm/65 lbf.ft) in numbered sequence (torque check).
- Final tightening: angle tighten the bolts 60 degrees in numbered sequence.
Specs & values
- 30 Nm first stage
- 85 Nm 61 series
- 90 Nm 71 series
- 60 degrees final angle tightening
Source: Volvo Penta service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.