Generac G-Force 1000 Series — Checking Valve Clearance
Adjustments · Valve train
For the Generac G-Force 1000 Series, from the Generac owner's manual.
Applies to: Generac G-Force 400 Series engine, Generac G-Force 800 Series engine, Generac G-Force 1000 Series engine
Before you start
- Risk of Burn. Allow the engine to cool before performing the following procedure.
- Accidental start-up. Disconnect spark plug wires when working on unit.
Procedure
- Close fuel valve and disconnect battery to avoid accidental startup.
- Remove spark plug wire(s) and position away from plug(s).
- Remove spark plug(s).
- Remove the four screws attaching the valve cover; remove and discard gasket.
- Verify piston is at top dead center (TDC) of its compression stroke (both valves closed).
- Inspect valve clearance between each rocker arm and valve stem with a feeler gauge.
- Install replacement valve cover gasket(s).
- Install valve cover(s); tighten fasteners in a cross pattern.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Valve clearance 0.002–0.004 in (0.05–0.1 mm)
- Valve cover fasteners: 10 kW 80 in-lb (9.0 Nm); 20–22 kW 60 in-lb (6.8 Nm)
Source: Generac owner'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.