1997 SUBARU LEGACY Service Repair Manual

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Page 345 of 3342

SUBARU LEGACY 1997 Service Repair Manual Valve springFree length 48.04 mm (1.8913 in)
Squareness 2.5°, 2.1 mm (0.083 in)
Tension/spring height146.1—167.7 N
(14.9—17.1 kg, 32.9—37.7 lb)/42.0 mm (1.654 in)
455.0—523.7 N
(46.4—53.4 k

Valve springFree length 48.04 mm (1.8913 in)
Squareness 2.5°, 2.1 mm (0.083 in)
Tension/spring height146.1—167.7 N
(14.9—17.1 kg, 32.9—37.7 lb)/42.0 mm (1.654 in)
455.0—523.7 N
(46.4—53.4 kg, 102.3—117.7 lb)/33.4 mm (1.315 in)
Cylinder
blockSurface warpage limit (mating with cylinder head) 0.05 mm (0.0020 in)
Surface grinding limit 0.1 mm (0.004 in)
Cylinder bore STDA 99.505—99.515 mm (3.9175—3.9179 in)
B 99.495—99.505 mm (3.9171—3.9175 in)
TaperSTD 0.015 mm (0.0006 in)
Limit 0.050 mm (0.0020 in)
Out-of-roundnessSTD 0.010 mm (0.0004 in)
Limit 0.050 mm (0.0020 in)
Piston clearanceSTD 0.010—0.030 mm (0.0004—0.0012 in)
Limit 0.050 mm (0.0020 in)
Enlarging (boring) limit 0.5 mm (0.020 in)
Piston Outer diameterSTDA 99.485—99.495 mm (3.9167—3.9171 in)
B 99.475—99.485 mm (3.9163—3.9167 in)
0.25 mm (0.0098 in)
OS99.725—99.735 mm (3.9262—3.9266 in)
0.50 mm (0.0197 in)
OS99.975—99.985 mm (3.9360—3.9364 in)
Piston pinStandard clearance between piston
pin and hole in pistonSTD 0.004—0.010 mm (0.0002—0.0004 in)
Limit 0.020 mm (0.0008 in)
Degree of fitPiston pin must be fitted into position with thumb at 20°C
(68°F).
Piston ringPiston ring gapTop ringSTD 0.20—0.35 mm (0.0079—0.0138 in)
Limit 1.0 mm (0.039 in)
Second
ringSTD 0.37—0.52 mm (0.0146—0.0205 in)
Limit 1.0 mm (0.039 in)
Oil ringSTD 0.20—0.60 mm (0.0079—0.0236 in)
Limit 1.5 mm (0.059 in)
Clearance between piston
ring and piston ring grooveTop ringSTD 0.040—0.080mm (0.0016—0.0031 in)
Limit 0.15 mm (0.0059 in)
Second
ringSTD 0.030—0.070 mm (0.0012—0.0028 in)
Limit 0.15 mm (0.0059 in)
Connecting
rodBend twist per 100 mm (3.94 in) in
lengthLimit 0.10 mm (0.0039 in)
Side clearanceSTD 0.070—0.330 mm (0.0028—0.0130 in)
Limit 0.4 mm (0.016 in)
Connecting
rod bearingOil clearanceSTD 0.010—0.038 mm (0.0004—0.0015 in)
Limit 0.05 mm (0.0020 in)
Thickness at center portionSTD 1.492—1.501 mm (0.0587—0.0591 in)
0.03 mm
(0.0012 in)
US1.510—1.513 mm (0.0594—0.0596 in)
0.05 mm
(0.0020 in)
US1.520—1.523 mm (0.0598—0.0600 in)
0.25 mm
(0.0098 in)
US1.620—1.623 mm (0.0638—0.0639 in)
Connecting
rod bushingClearance between piston pin and
bushingSTD 0—0.022 mm (0—0.0009 in)
Limit 0.030 mm (0.0012 in)
STD: Standard OS: Oversize US: Undersize
4
2-3bSPECIFICATIONS AND SERVICE DATA
1. Engine

Page 346 of 3342

SUBARU LEGACY 1997 Service Repair Manual CrankshaftBend limit 0.035 mm (0.0014 in)
Crank pin and crank journalOut-of-roundness 0.020 mm (0.0008 in) or less
Grinding limit 0.25 mm (0.0098 in)
Crank pin outer diameterSTD 47.984—48.000 mm (1.

Page 347 of 3342

SUBARU LEGACY 1997 Service Repair Manual 1. Timing Belt
B2M1244A
1Right-hand belt cover No. 2

2Crankshaft sprocket

3Left-hand belt cover No. 2

4Tensioner bracket

5Tensioner adjuster

6Belt tensioner

7Belt idler

8Right-hand exha

Page 348 of 3342

SUBARU LEGACY 1997 Service Repair Manual 2. Cylinder Head and Camshaft
B2M0681A
1Rocker cover (RH)

2Rocker cover gasket (RH)

3Oil separator cover

4Gasket

5Intake camshaft cap (Front RH)

6Intake camshaft cap (Center RH)

7Intake c

Page 349 of 3342

SUBARU LEGACY 1997 Service Repair Manual 3. Cylinder Head and Valve Assembly
B2M1007A
1Exhaust valve

2Intake valve

3Cylinder head

4Valve spring seat

5Intake valve oil seal

6Valve spring
7Retainer

8Retainer key

9Valve lifter

Page 350 of 3342

SUBARU LEGACY 1997 Service Repair Manual 4. Cylinder Block
B2M0381A
1Oil pressure switch

2Cylinder block (RH)

3Service hole plug

4Gasket

5Oil separator cover

6Water pipe

7Oil pump

8Front oil seal

9Rear oil seal

10O-ring

Page 351 of 3342

SUBARU LEGACY 1997 Service Repair Manual 5. Crankshaft and Piston
B2M0683A
1Drive plate

2Reinforcement

3Top ring

4Second ring

5Oil ring

6Piston

7Piston pin

8Circlip

9Connecting rod bolt

10Connecting rod

11Connecting rod

Page 352 of 3342

SUBARU LEGACY 1997 Service Repair Manual G2M0709
1. General Precautions
1) Before disassembling engine, place it on ST3.
ST1 498457000 ENGINE STAND ADAPTER RH
ST2 498457100 ENGINE STAND ADAPTER LH
ST3 499817000 ENGINE STAND
2) All parts shou

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