Section 03-00: Engine, Service
1996 All F-150, F-250, F-350, F-Super Duty and Bronco Vehicles Equipped with 4.9L, 5.0L, 5.8L or 7.5L Gasoline Engines, and 7.3L Diesel Engines Workshop Manual
SERVICE PROCEDURES

Oil Pump, 7.3L Diesel Engine

 

Hard Start — No Start Dry Reservoir

Inspection

  1. NOTE: Low oil pressure from the engine oil pump can also cause low oil levels in the oil reservoir.

    Perform oil pump pressure test. Refer to Oil Pump Inspection in Section 03-01D.

  1. Remove oil reservoir fill plug and refill reservoir.

  1. Start engine, test drive vehicle for 16 km (10 miles).

  1. Remove oil reservoir fill plug and verify reservoir is full.

  1. Inspect oil reservoir and engine front cover for evidence of oil leakage. If leakage is detected, service or replace as necessary.

  1. If no evidence of oil leakage is found, allow vehicle to sit overnight.

  1. NOTE: Perform following step before starting engine.

    Remove oil reservoir fill plug and inspect reservoir oil level to determine if leak-down has occurred.

  1. If oil leak-down has been confirmed and no evidence of leakage can be found around oil reservoir or engine front cover, then the leakage point most likely will be the anti-drainback check valve integral to the high-pressure oil pump. Replace high-pressure oil pump. Refer to Section 03-01D. Retest for leak-down.