GM Service Manual Online
For 1990-2009 cars only

Engine Block Valley Cover Installation L98, LS2


    Object Number: 1951064  Size: SH

    Important: All gasket surfaces should be free of oil or other foreign material during assembly.

  1. Install the NEW valley cover gasket (3).
  2. Install the valley cover (2).
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the valley cover to cylinder block retaining bolts (1).
  5. Tighten
    Tighten the bolts to 25N·m (18 lb ft).

Engine Block Valley Cover Installation LS3


    Object Number: 1552536  Size: SH

    Important: All gasket surfaces should be free of oil or other foreign material during assembly.

  1. Lubricate the O-ring seals (537) with clean engine oil.
  2. Install the O-ring seals (537) to the cover.
  3. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1559897  Size: SH
  4. Install the cover (555), gasket (556), and bolts (506).
  5. Tighten
    Tighten the cover bolts to 25 N·m (18 lb ft).


    Object Number: 1408864  Size: SH
  6. Apply sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent, to the threads of the sensor.
  7. Install the oil pressure sensor (706) and sealing washer (707).
  8. Tighten
    Tighten the sensor to 35 N·m (26 lb ft).