Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1998 1998 Service Manual ENGINE SECTION ENGINE (DOHC) MSA5TCD98L20880

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MSA5TCD98L20880


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2-3b   [W3A1]                       SERVICE PROCEDURE
3. Camshaft


3. Camshaft
A: REMOVAL
1. RELATED PARTS
Remove timing belt, camshaft sprockets and related parts.

2. CAMSHAFT




                                                                                                      S2M0298A


(1) Spark plug cord                 (4) Intake camshaft cap (LH)          (7) Exhaust camshaft (LH)
(2) Rocker cover (LH)               (5) Intake camshaft (LH)
(3) Rocker cover gasket (LH)        (6) Exhaust camshaft cap (LH)

1) Remove camshaft position sensor (LH side             4) Loosen intake camshaft cap bolts equally, a
only).                                                  little at a time in alphabetical sequence shown in
2) Remove spark plug cord.                              figure.
3) Remove rocker cover and gasket.




                                                                                                B2M1393B

                                                        5) Remove camshaft caps and intake camshaft.


                                                   30
                                         SERVICE PROCEDURE                                        [W3B1] 2-3b
                                                                                                     3. Camshaft


6) Loosen exhaust camshaft cap bolts equally, a               4) Measurement of the camshaft journal oil clear-
little at a time in alphabetical sequence shown in            ance
figure.                                                          (1) Clean the bearing caps and camshaft jour-
                                                                 nals.
                                                                 (2) Place the camshafts on the cylinder head.
                                                                 (Without installing valve rocker.)
                                                                 (3) Place plastigauge across each of the cam-
                                                                 shaft journals.
                                                                 (4) Install the bearing caps.
                                                                 
                                                              CAUTION:
                                                              Do not turn the camshaft.
                                           B2M1394B             (5) Remove the bearing caps.
                                                                (6) Measure the widest point of the plastigauge
7) Remove camshaft caps and exhaust camshaft.                   on each journal.
CAUTION:                                                        If the oil clearance exceeds the limit, replace the
Arrange camshaft caps in order so that they                     camshaft. If necessary, replace the camshaft
can be installed in their original positions.                   caps and cylinder head as a set.
8) Similarly, remove right-hand camshafts and                 Standard oil clearance:
related parts.                                                    0.037 -- 0.072 mm (0.0015 -- 0.0028 in)
                                                              Limit:
B: INSPECTION                                                     0.10 mm (0.0039 in)
1. CAMSHAFT
1) Measure the bend, and repair or replace if nec-
essary.
Limit:
    0.020 mm (0.0008 in)




                                                                                                        B2M1216

                                                                (7) Completely remove the plastigauge.




                                            G2M0746

2) Check journal for damage and wear. Replace if
faulty.
3) Measure outside diameter of camshaft journal.
If the journal diameter is not as specified, check the
oil clearance.
                         Camshaft journal
           Front                 Center, rear
           31.946 -- 31.963 mm 27.946 -- 27.963 mm
Standard
           (1.2577 -- 1.2584 in) (1.1002 -- 1.1009 in)




                                                         31
2-3b   [W3B1]                        SERVICE PROCEDURE
3. Camshaft


5) Check cam face condition; remove minor faults          6) Measure the thrust clearance of camshaft with
by grinding with oil stone. Measure the cam height        dial gauge. If the clearance exceeds the limit,
H; replace if the limit has been exceeded.                replace caps and cylinder head as a set. If neces-
Cam height: H                                             sary replace camshaft.
Standard:                                                 Standard:
  Intake:                                                     0.040 -- 0.080 mm (0.0016 -- 0.0031 in)
     42.20 -- 42.30 mm (1.6614 -- 1.6654 in)              Limit:
  Exhaust:                                                    0.1 mm (0.004 in)
     Front: 42.50 -- 42.60 mm (1.6732 --
     1.6772 in)
     Rear: 41.40 -- 41.50 mm (1.6299 -- 1.6339
     in)
Limit:
  Intake:
     42.04 mm (1.6551 in)
  Exhaust:
     Front: 42.34 mm (1.6669 in)
     Rear: 41.24 mm (1.6236 in)
Cam base circle diameter A:                                                                      B2M1217
   28.0 mm (1.102 in)




                                      B2M1209A




                                                     32
                                  SERVICE PROCEDURE                           [W3C1] 2-3b
                                                                                 3. Camshaft


C: INSTALLATION
1. CAMSHAFT




                                                                                      S2M0298C


(1)   Intake camshaft (LH)        (6) Rocker cover (LH)   Tightening torque: N



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