Mitsubishi — Valve clearance inspection and adjustment
Adjustments
From a Mitsubishi service manual — check it applies to your exact model before use.
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Before you start
- Check and adjust valve clearance when engine is cold or warm in whole.
Procedure
- Check valve clearance by firing order, turning crankshaft by specified crank angle to bring piston to TDC on compression stroke.
- Identify TDC when timing mark '0' on crankshaft pulley aligns with pointer on gear case.
- Insert feeler gauge between rocker arm and valve cap, check valve clearance.
- Loosen lock nut for adjusting screw, turn screw to adjust clearance until gauge is slightly gripped.
- Tighten lock nut, and again check the clearance.
Tools required
- feeler gauge Amazon
- socket and ratchet handle (46 mm width across flats crankshaft pulley nut) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Valve clearance (cold): 0.25 mm (0.0098 in.)
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.