Mitsubishi S12A2 — Adjusting valve clearance
Adjustments · Valve mechanism
For the Mitsubishi S12A2, from the Mitsubishi service manual.
Applies to: Mitsubishi S12A2
Before you start
- The valve clearance should be inspected and adjusted when the engine is cold.
Procedure
- Insert the feeler gauge of the specified thickness between rocker arm and bridge cap.
- Adjust the clearance by turning the screw so that the gauge is gripped softly.
- After adjusting, tighten the lock nut firmly.
- Inspect the clearance again.
Tools required
- Feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Inlet valve clearance: 0.4 mm [0.016 in.]
- Exhaust valve clearance: 0.5 mm [0.020 in.]
Full service-parts list: Mitsubishi S12A2 →
Source: Mitsubishi 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.