Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual ENGINE SECTION ENGINE (DOHC) MSA5TCD96L5986

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2-3b                                                   DIAGNOSTICS
2. Engine Noise


                                                          2. Engine Noise
                                                          Valve lash adjusters may make clicking noise once engine
                                                          starts. It is normal if clicking noise ceases after a few min-
                                                          utes.
                                                          If clicking noise continues for more than a few minutes,
                                                          inspect Hydraulic Lash Adjuster (HLA) in accordance with
                                                          the following flow chart.

  Inspect the engine oil level
  (1) Adjust the oil level between "F" and "L".
  (2) Replace the oil when deteriorated.




  Load less engine operation to bleed air from          Noise is eliminated.    Keep the engine running at 2,500 rpm for about
  HLA.                                                                          five minutes to bleed air completely.
  (1) Warm-up engine for about five minutes.
  (2) If the noise is remaining, keep the engine
  running at 2,000 rpm for up to 20 minutes until
  the noise fades away.



Noise remains or comes                                                                               END
back.

                                                                               HLA is rigid and has no valve clearance.

  Remove the rocker cover and inspect HLA.                                      HLA is normal. The noise may come from other
  Press HLA while it is facing the base circle of                               sources.
  the cam.



HLA is not rigid.
                                                  There is valve clearance.
                                                                                HLA is seized. Replace HLA.

  Check whether the clearance between HLA and
  the bushing of the cylinder head is within            Out of allowance
  allowance or not.                                                             Replace the cylinder head related parts or the
                                                                                HLA, whichever is necessary.


Within allowance

  Replace HLA.




                                                                  78
                                                          DIAGNOSTICS                                                         2-3b
                                                                                                                    2. Engine Noise


                                                           If noise still exists, conduct diagnostics procedures in
                                                           accordance with the following table.
                                                           CAUTION:
                                                           Do not disconnect spark plug cord while engine is run-
                                                           ning.
         Type of sound                        Condition                                     Possible cause
                                                             Valve mechanism is defective.
                                                             

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