Northern Lights NL498D2 / NL498K2 — Retighten Cylinder Head Bolts
Maintenance
For the Northern Lights NL498D2 / NL498K2, from the Northern Lights operator's manual.
Applies to: Northern Lights NL498D2
Procedure
- Tighten bolts when engine is cold.
- Loosen nuts and remove rocker arm cover.
- Tighten head bolts with torque wrench in the order shown in Figure 9.
- Tighten evenly in 2 or 3 passes, ending at specified torque in final pass.
- Replace rocker arm cover.
Tools required
- torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- First step: 49.0 ~ 58.8 N·m (5.0 ~ 6.0 kgf·m)
- Second step: 103.1 ~ 112.9 N·m (10.5 ~ 11.5 kgf·m)
Full service-parts list: Northern Lights NL498D2 →
Source: Northern Lights operator's 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.