Cummins/Onan — Cylinder Head Tightening
Adjustments
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MCCK
Procedure
- Tighten cylinder head bolts in order designated per Figure 44.
- Torque to 5 foot-pounds (6.8 Nm).
- Torque to 10 foot-pounds (13.5 Nm).
- Continue in steps until all are torqued to 29 to 31 foot-pounds (39-42 Nm).
Tools required
- torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 29 to 31 ft-lb (39-42 Nm)
Full service-parts list: Cummins/Onan MCCK →
Source: Cummins/Onan 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.