Isuzu — Injection Nozzle Adjustment
Adjustments
From a Isuzu service manual — check it applies to your exact model before use.
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Before you start
- TEST FLUID FROM THE INJECTION NOZZLE TESTER WILL SPRAY OUT UNDER GREAT PRESSURE. IT CAN EASILY PUNCTURE A PERSON'S SKIN. KEEP YOUR HANDS AWAY FROM THE INJECTION NOZZLE TESTER AT ALL TIMES.
Procedure
- Clamp the injection nozzle in a vise.
- Use a wrench to remove the injection nozzle retaining nut.
- Install the injection nozzle, push rod, spring, and adjusting shim.
- Attach the injection nozzle holder to the injection nozzle tester.
- Apply pressure to the nozzle tester to check that the injection nozzle opens at the specified pressure.
- If not, install or remove the appropriate number of adjusting shims to adjust it.
Tools required
- Injection nozzle tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Retaining Nut Torque: 4.0 – 5.0 kgf·m (28.9 – 36.2/39.2 – 49.0)
- Injection Nozzle Opening Pressure: 185 kgf/cm2 (2,630/18.1)
- Adjusting Shim Availability: Range 0.50 – 1.50 mm, Increment 0.025 mm, Total 40
Source: Isuzu 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.