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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (3.8L V6 Gas - VIN [L]) >> Engine Oiling >> Oil Pump >> Removal & Disassembly

Removal & Disassembly

WARNING: This page is about a different car, the 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
  1. If servicing oil pump, remove oil pan. See OIL PAN  under REMOVAL & INSTALLATION. Remove oil pump pick-up tube. Remove timing chain cover. See TIMING CHAIN COVER  under REMOVAL & INSTALLATION.
  2. To service pressure relief valve, drill a 1/8" (3.175 mm) hole in pressure relief valve retainer cap. Pressure relief valve retainer cap is located at oil pan surface of timing chain cover, near oil pan stud.
  3. Install a self-tapping screw into hole. If timing chain cover is installed, pull self-tapping screw to remove retainer cap.
  4. If timing chain cover is removed, clamp self-tapping screw in a vise. Support timing chain cover while lightly tapping on timing chain cover using soft-faced hammer until retainer cap is removed.
  5. Remove spring and pressure relief valve. Remove bolts and pump cover. Note direction of rotor installation for reassembly reference. Remove inner and outer rotors. See Fig 1.
Fig 1: Exploded View Of Oil Pump
G90J02584Courtesy of CHRYSLER CORP.
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