Generac — Crankcase Cover Installation (Small 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.

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Procedure

1. Rest the crankcase on its side with the crankcase cover flange facing upward.
2. Check that the valve tappets, crankshaft, connecting rod assembly and camshaft are properly installed.
3. Make sure the timing marks on the crankshaft and camshaft gears are properly aligned.
4. Place the crankcase cover gasket onto the crankcase flange.
5. Apply engine oil to the crankshaft and camshaft journals and to their bores in the cover.
6. Insert the tubular end of the oil pickup into its cover bore with the screen facing downward.
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 torque per specifications.
10. After tightening, 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.

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