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 (SOHC) MSA5TCD98L20868
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SERVICE PROCEDURE [W6A2] 2-3a
6. Cylinder Block
6. Cylinder Block
2) Remove intake manifold and cylinder head.
A: REMOVAL
1. RELATED PARTS
1) Remove timing belt, camshaft sprocket and
related parts.
2. OIL PUMP AND WATER PUMP
B2M1767A
(1) Clutch housing cover (MT (4) Oil separator cover (8) Oil pan
vehicles only) (5) Water by-pass pipe (9) Oil strainer
(2) Flywheel (MT vehicles only) (6) Water pump (10) Baffle plate
(3) Drive plate (AT vehicles only) (7) Oil pump (11) Oil filter
1) Remove clutch housing cover. (MT vehicles
only)
45
2-3a [W6A2] SERVICE PROCEDURE
6. Cylinder Block
2) Remove flywheel or drive plate. 7) Removal of oil pan
To lock crankshaft use ST. (1) Turn cylinder block with #2 and #4 piston
ST 498497100 CRANKSHAFT STOPPER sides facing upward.
(2) Remove bolts which secure oil pan to cylin-
der block.
(3) Insert a oil pan cutter blade between cylin-
der block-to-oil pan clearance and remove oil
pan.
CAUTION:
Do not use a screwdriver or similar tool in
place of oil- pan cutter.
G2M0163
8) Remove oil strainer stay.
G2M0161 9) Remove oil strainer.
10) Remove baffle plate.
3) Remove oil separator cover.
4) Remove water by-pass pipe. 11) Remove oil filter.
5) Remove water pump.
6) Remove oil pump from cylinder block.
Use a flat-bladed screwdriver as shown in Figure
when removing oil pump.
CAUTION:
Be careful not to scratch the mating surface of
cylinder block and oil pump.
S2M0722A
46
SERVICE PROCEDURE [W6B1] 2-3a
6. Cylinder Block
B: DISASSEMBLY
1. PISTON PIN AND CYLINDER BLOCK CONNECTING BOLT
B2M1002A
(1) Service hole plug (3) Gasket (5) Piston pin
(2) Service hole cover (4) Circlip
1) Remove service hole cover and service hole 3) Draw out piston pin from #1 and #2 pistons by
plugs using hexagon wrench (14 mm). using ST.
2) Rotate crankshaft to bring #1 and #2 pistons to ST 499097500 PISTON PIN REMOVER
bottom dead center position, then remove piston CAUTION:
circlip through service hole of #1 and #2 cylinders. Be careful not to confuse original combination
of piston, piston pin and cylinder.
G2M0165
G2M0166
47
2-3a [W6B2] SERVICE PROCEDURE
6. Cylinder Block
4) Similarly remove piston pins from #3 and #4 5) Remove bolts which connect cylinder block on
pistons by using ST. the side of #2 and #4 cylinders.
ST 499097500 PISTON PIN REMOVER 6) Back off bolts which connect cylinder block on
the side of #1 and #3 cylinders two or three turns.
G2M0166
2. CYLINDER BLOCK
B2M1319D
(1) Bolt (4) Rear oil seal (7) Crankshaft bearing
(2) Cylinder block (RH) (5) Crankshaft (8) Piston
(3) Cylinder block (LH) (6) Connecting rod
1) Set up cylinder block so that #1 and #3 cylin- 3) Remove rear oil seal.
ders are on the upper side, then remove cylinder 4) Remove crankshaft together with connecting
block connecting bolts. rod.
2) Separate left-hand and right-hand cylinder 5) Remove crankshaft bearings from cylinder
blocks. block using hammer handle.
CAUTION: CAUTION:
When separating cylinder block, do not allow Do not confuse combination of crankshaft
the connecting rod to fall and damage the cyl- bearings. Press bearing at the end opposite to
inder block. locking lip.
48
SERVICE PROCEDURE [W6C1] 2-3a
6. Cylinder Block
6) Draw out each piston from cylinder block using
wooden bar or hammer handle.
CAUTION:
Do not confuse combination of piston and cyl-
inder.
3. CRANKSHAFT AND PISTON
B2M1320G
(1) Connecting rod cap (3) Top ring (5) Oil ring
(2) Connecting rod bearing (4) Second ring (6) Circlip
1) Remove connecting rod cap. 3) Inspect crankcase surface that mates with cyl-
2) Remove connecting rod bearing. inder head for warping by using a straight edge,
CAUTION: and correct by grinding if necessary.
Arrange removed connecting rod, connecting Warping limit:
rod cap and bearing in order to prevent confu- 0.05 mm (0.0020 in)
sion. Grinding limit:
3) Remove piston top and second rings using the 0.1 mm (0.004 in)
piston ring expander. Standard height of cylinder block:
4) Remove the oil ring by hand. 201.0 mm (7.91 in)
CAUTION:
Arrange the removed piston rings in good
order to prevent confusion.
5) Remove circlip.
C: INSPECTION
1. CYLINDER BLOCK
1) Check for cracks and damage visually.
Especially, inspect important parts by means of red
lead check.
2) Check the oil passages for clogging.
49
2-3a [W6C2] SERVICE PROCEDURE
6. Cylinder Block
2. CYLINDER AND PISTON 2) How to measure the inner diameter of each
cylinder Measure the inner diameter of each cylin-
1) The cylinder bore size is stamped on the cylin-
der in both the thrust and piston pin directions at
der block's front upper surface.
the heights shown in the Figure, using a cylinder
CAUTION: bore gauge.
Measurement should be performed at a tem-
CAUTION:
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