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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Crankshaft Rear Oil Seal and Housing Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Use the J 44227  to install the crankshaft rear oil seal.
  2. Remove the J 44227  .
  3. Apply a 3 mm (0.12 in) bead of GM P/N 12378521 to the rear oil seal housing (1).
    Fig 1: Applying Bead Of GM P/N 12378521 To Rear Oil Seal Housing
    G02128606Courtesy of GENERAL MOTORS CORP.
  4. Install the J 44219  guide pins into the block.
    IMPORTANT:
    • When installing a new seal, use the plastic installation sleeve supplied with the new seal.
    • The seal installation sleeve should come off after the seal is installed. Disregard the sleeve.
  5. Slide the crankshaft rear oil seal housing over the alignment pins J 44219  and crankshaft.
  6. Install the crankshaft rear oil seal housing bolts, except the two in place of the guide pins.
  7. Remove the J 44219  guide pins.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  8. Install the remaining two crankshaft rear oil seal housing bolts.

    Tighten 

    Tighten all the oil seal housing bolts to 10 N.m (89 lb in).

    Fig 2: Installing Crankshaft Seal Housing
    G02128607Courtesy of GENERAL MOTORS CORP.
  9. Wipe off any excess material from the bottom of the oil pan sealing area (1).
    Fig 3: Wiping Off Any Excess Material From Bottom Of Oil Pan Sealing Area
    G02128608Courtesy of GENERAL MOTORS CORP.
  10. Install the fly wheel and secure with the bolts.

    Tighten 

    Tighten the fly wheel bolts in sequence to 25 N.m (18 lb ft).

  11. Use the J 36660-A  to tighten the bolts an additional 50 degrees.
  12. Install the transmission. Refer to TRANSMISSION .
    Fig 4: Installing Fly Wheel & Tightening Bolts In Sequence
    G02128609Courtesy of GENERAL MOTORS CORP.
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