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Installation (Engine Has Been Rotated With Distributor Removed)

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: If the malfunction indicator lamp (MIL) turns on and DTC P1345 sets after installing the distributor, this indicates an incorrectly installed distributor. Engine damage or distributor damage may occur.
  1. If engine was rotated after distributor was removed, remove No. 1 spark plug. Place finger over cylinder No. 1 spark plug hole. Crank engine slowly until compression is felt. The 2 marks on the crankshaft pulley should align with the 2 engine front cover tabs. See Fig 2. If necessary, rotate engine by hand until timing marks are fully aligned.
  2. Align White paint mark on bottom stem of distributor and the pre-drilled indent hole in the bottom of the gear. See Fig 3. Using a long screwdriver, align the oil pump driveshaft to the drive tab on the distributor.
  3. Carefully lower distributor into engine with flat side of distributor housing facing toward front of vehicle. See Fig 4. Once distributor is fully seated, distributor rotor should be aligned with pointer cast into distributor housing.
  4. If distributor rotor is not properly aligned, remove distributor and repeat procedure until mark aligns properly. Install distributor hold-down bolt and tighten to specification. See TORQUE SPECIFICATIONS .
  5. Install the distributor cap. Install new distributor cap screws to specification. Connect the CMP sensor and fuel pump/oil pressure sensor electrical connectors.
  6. Install the ignition coil wire to the ignition coil and distributor cap. The coil wire nipple must be positioned such that it is between 35 and 60 degrees aft of perpendicular as referenced from the engine centerline on the outboard side of the coil. See Figure.
  7. If the MIL is on after installing the distributor, and DTC P1345 is found, the distributor has been installed incorrectly. Repeat installation procedure.
  8. If the MIL is not on, install the air cleaner resonator outlet duct. See AIR CLEANER RESONATOR OUTLET DUCT  under AIR INDUCTION SYSTEMS.
Fig 1: Removing Distributor Cap (4.3L)
G00217042Courtesy of GENERAL MOTORS CORP.
Fig 2: Aligning Timing Marks (4.3L)
G00143825Courtesy of GENERAL MOTORS CORP.
Fig 3: Aligning Distributor Marks (4.3L)
G00143826Courtesy of GENERAL MOTORS CORP.
Fig 4: Rotor Position With Distributor Installed (4.3L)
G00143827Courtesy of GENERAL MOTORS CORP.
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