Mitsubishi S4S-D — Bleeding of Fuel System
Maintenance
For the Mitsubishi S4S-D, from the Mitsubishi service manual.
Applies to: Mitsubishi S4S-D, Mitsubishi S4S engine
Before you start
- Thoroughly wipe off any fuel spilled from the air vent plugs.
Procedure
- Start bleeding from the location closest to the fuel tank.
- Loosen the air vent plug of the fuel filter.
- Repeatedly push the priming pump until no air bubbles appear in the fuel.
- Securely tighten the air vent plug.
- For the fuel injection pump, loosen its air vent plug about 1.5 turns and operate the priming pump.
- Tighten when no air bubbles appear, then lock the priming pump cap.
Tools required
- Wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Loosen air vent plug about 1.5 turns
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.