Mitsubishi — Inspecting the V-belt and Adjusting Belt Tension
Adjustments · V-belt / alternator
From a Mitsubishi owner's manual — check it applies to your exact model before use.
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Before you start
- Keep oil and grease away from belt
- Excessive tension causes rapid alternator bearing wear
Procedure
- Inspect V-belt appearance; replace if damaged or separated.
- Check deflection is 10 to 15 mm with approx. 98 to 147 N applied at center.
- Alternator side: remove alternator front cover and belt cover.
- Loosen all retaining bolts on alternator and adjusting rod.
- Loosen upper and lower lock nuts (lower nut has left-hand threads).
- Turn adjusting rod to adjust tension.
- Tighten lock nuts then all retaining bolts.
- Reinstall covers.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- V-belt deflection 10 to 15 mm [0.39 to 0.59 in.] with 98 to 147 N [10 to 15 kgf]
Source: Mitsubishi 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.