Kohler — Valve / rocker arm clearance adjustment
Adjustments · Valve/rocker arm
From a Kohler service manual covering: KD 626-3, KD 626-3 B2 NR, KD 626-3 EPA, KD 626-3 NR. Check it applies to your exact model before use.
Applies to: Kohler KD 626-3, Kohler KD 626/3 engine
Before you start
- Make settings when the engine is cold
Procedure
- Make settings when the engine is cold.
- Remove the rocker arm covers and check that seals are intact, otherwise replace.
- Bring the cylinder piston to be adjusted to the compression top dead centre.
- Loosen the fastening nut C, insert the thickness gauge D between rocker arm and valve stem.
- Turn adjusting screw B with a cross-head screwdriver to set clearance.
- Tighten fastening screw C and recheck clearance.
- Refit cover, tighten screws to 20 Nm.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake 0,15 ÷ 0,2 mm
- Exhaust 0,3 ÷ 0,35 mm
- Cover screws 20 Nm
Full service-parts list: Kohler KD 626-3 →
Source: Kohler 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.