Generac — Crankcase Cover Installation (Large Frame Engine)

Repair & overhaul

From a Generac service manual covering: GN-190, GN-191, GN-320, GN-360. Check it applies to your exact model before use.

Browse Generac generators & specs →

Procedure

1. Rest the engine on its side with the crankcase cover flange facing upward.
2. Install the valve tappets, crankshaft, connecting rod assembly, camshaft and balancer.
3. Make sure the timing marks on the crankshaft, camshaft and balancer gears are properly aligned.
4. Place the crankcase cover gasket onto the crankcase flange.
5. Apply clean engine oil to the crankshaft, camshaft and balancer journals and bores.
6. Install the oil pickup screen, mating its locating tang with the locating slot in the cover bore.
7. Install the oil pump inner and outer rotors; coat the inner rotor with general purpose grease.
8. Carefully install the crankcase cover, aligning with dowel pins; DO NOT FORCE.
9. Install the crankcase cover bolts and tighten per specifications.
10. After torquing, make sure the crankshaft turns freely.

Source: Generac 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.

More Generac repair guides →