Fuel Rail and Injectors Cleaning and Inspection (LDK, LHU)
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Fuel Rail and Injectors Cleaning and Inspection (LDK, LHU)
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Special Tools
EN-48266
Injector Seal Installer and Sizer
For equivalent regional tools, refer to
Special Tools (LDK, LHU)
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1.
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Unplug the electrical connections from the fuel injectors (1).
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2.
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Note
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DO NOT tilt or twist the injector during removal.
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Remove the injectors from the fuel rail by pulling straight out along the fuel injector axis.
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3.
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Remove and discard the fuel injector hold-down clamp (3).
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4.
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Remove and discard the fuel injector O-ring (2) and plastic spacer (1).
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5.
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Remove and discard the fuel injector seal (1).
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6.
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Note
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Do not soak or submerge the fuel rail or injectors in solvent.
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Clean the exterior of the fuel rail (2) and injectors in solvent.
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7.
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Refer to
Fastener Caution
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Inspect the high pressure fuel sensor (1) for damage.
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7.1.
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If replacing, dry the fuel pressure sensor bore in the fuel rail with a lint free cloth.
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7.2.
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The bore should be free of fuel, debris, and burrs.
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7.3.
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Lubricate the fuel pressure sensor bore, in the fuel rail, with clean engine oil.
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7.4.
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Lubricate the threads and sealing area on the fuel pressure sensor with clean engine oil.
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7.5.
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Install the fuel pressure sensor hand tight.
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7.6.
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Remove the fuel pressure sensor and re-lubricate the bore, threads, and sealing area.
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7.7.
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Re-install the fuel pressure sensor. Tighten the high pressure fuel sensor to
33 Nm (25 lb ft)
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8.
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Inspect the fuel rail and components for the following conditions:
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Damage, debris, or restrictions to the fuel rail
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Damage, debris, or restrictions to the fuel ports in the fuel rail
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Damage to the mounting area for the fuel rail
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Damage to the fuel rail mounting bolts
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Damage to the threads on the fuel rail fuel feed fitting
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9.
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Inspect the fuel injectors for the following conditions:
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Damage to the fuel injector connector (7)
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Damage to the fuel injector harness connector
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Damage to the fuel injector tip (1)
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Damage to the tolerance ring (2)
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Damage to the wave guide (3), if equipped
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10.
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Replace the fuel rail or injector if any damage is found. Do not attempt to repair a fuel rail or injector.
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11.
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Lubricate the NEW O-ring (5) with 5W30 engine oil.
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12.
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Install a NEW O-ring and plastic spacer (4) on the injector. The plastic spacer has a top (6) and a bottom. The top, O-ring sealing area, is wider.
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13.
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Note
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Do not use any type of lubricant when installing the NEW seal (1) on the fuel injector tip.
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Install
EN-48266
installer (2) onto the fuel injector tip. Install a NEW seal (1) over
EN-48266
installer on the injector. The seal must be installed/slid into the recessed area (3) of the fuel injector. Compress the seal with your fingers before resizing the seal using the
EN-48266
sizer.
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14.
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Using the
EN-48266
sizer (4) , resize the seal.
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15.
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Install a NEW fuel injector hold-down clamp (2) on the fuel injector (1).
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16.
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Repeat the fuel injector cleaning and inspection process for all 4 fuel injectors.
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17.
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Note
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DO NOT tilt or twist the injector during installation.
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Install the fuel injectors (1) by pushing the injectors straight into the fuel rail along the fuel injector axis.
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18.
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Connect the electrical connection to the fuel rail for each injector.
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