1997 SUBARU LEGACY belt

6) Install spark plug cords.
7) Install camshaft position sensor.
8) Similarly, install parts on right-hand side.
2. RELATED PARTS
Install timing belt, camshaft sprockets and related parts.

35
2-3bSERVICE PROCEDURE
3. Camshaft

4. Cylinder Head
A: REMOVAL
1. INTAKE MANIFOLD
1) Remove V-belt.
2) Remove generator, air conditioner compressor and
brackets.
3) Remove hoses and tubes from cylinder block.
4) Disconnect each connector and/or remove connector
bracket.
5) Remove coolant filler tank.
6) Remove intake manifold assembly and gasket.
7) Remove water pipe.
8) Remove crank angle sensor, cam angle sensor and
knock sensor.
9) Remove timing belt, camshaft sprockets and related
parts.

10) Remove rocker cover, camshafts and related parts.

2. CYLINDER HEAD
B2M0770A
36
2-3bSERVICE PROCEDURE
4. Cylinder Head

2) Install camshaft sprockets, timing belt and related parts.

B2M0702
B2M0703
3) Install engine coolant pipe.
CAUTION:
Use new gaskets.
47
2-3bSERVICE PROCEDURE
4. Cylinder Head

G2M0774
4) Install intake manifold.
CAUTION:
Use new gaskets.
5) Install coolant filler tank.
6) Install crankshaft position sensor, camshaft position
sensor and knock sensor. Use dry compressed air to
remove foreign particles before installing sensors.
7) Connect each connector and/or install connector
bracket.
8) Connect hoses and tubes to cylinder block.
9) Install brackets, generator and air conditioner compres-
sor.
10) Install V-belt.
48
2-3bSERVICE PROCEDURE
4. Cylinder Head

5. Cylinder Block
A: REMOVAL
1. RELATED PARTS
1) Remove timing belt, camshaft sprockets and related
parts.

B2M0702
49
2-3bSERVICE PROCEDURE
5. Cylinder Block

G2M0628
9) Install engine coolant pump and gasket.
CAUTION:
Be sure to use a new gasket.
When installing engine coolant pump, tighten bolts
in two stages in numerical sequence as shown in Fig-
ure.
10) Install engine coolant pipe.
11) Install oil filter.
2. RELATED PARTS
1) Install cylinder heads.

2) Install camshafts, rocker cover and related parts.

3) Install camshaft sprockets, timing belt and related parts.

76
2-3bSERVICE PROCEDURE
5. Cylinder Block

TROUBLE
Engine will not start.
Rough idle and engine stall
Low output, hesitation and poor acceleration
Surging
Engine does not return to idle.
Dieseling (Run-on)
After burning in exhaust system
Knocking
Excessive engine oil consumption
Excessive fuel consumption Starter does not turn.
Initial combustion does not occur.
Initial combustion occurs.
Engine stalls after initial combustion.
INTAKE SYSTEM
2111 3Loosened or cracked intake air pipe
3111 3 1Loosened or cracked blow-by hose
31211 2Loosened or cracked vacuum hose
22222Defective intake manifold gasket
22222Defective throttle body gasket
322 2 2Defective PCV valve
222 323Loosened oil filler cap
3312 1Dirty air cleaner element
FUEL LINE
13 322Defective fuel pump and relay
33322Clogged fuel line
222233Lack of or insufficient fuel
BELT
222Defective
222322 22 2Defective timing
FRICTION
3Seizure of crankshaft and connecting rod bearing
3Seized camshaft
3Seized or stuck piston and cylinder
COMPRESSION
333222 23 2Incorrect valve clearance
333223 3 3Loosened spark plugs or defective gasket
333223 3 3Loosened cylinder head bolts or defective gasket
333223 2 2Improper valve seating
333333 3 13Defective valve stem
222223 3 3Worn or broken valve spring
333233 3 12Worn or stuck piston rings, cylinder and piston
222111 12 2Incorrect valve timing
222222Improper engine oil (low viscosity)
78
2-3bDIAGNOSTICS
1. Engine Trouble in General

2. Engine Noise
Type of sound Condition Possible cause
Regular clicking soundSound increases as engine
speed increases.Valve mechanism is defective.
Incorrect valve clearance
Worn camshaft
Broken valve spring
Heavy and dull clankOil pressure is low.Worn crankshaft main bearing
Worn connecting rod bearing (big end)
Oil pressure is normal.Loose flywheel mounting bolts
Damaged engine mounting
High-pitched clank
(Spark knock)Sound is noticeable when
accelerating with an overload.Ignition timing advanced
Accumulation of carbon inside combustion chamber
Wrong spark plug
Improper gasoline
Clank when engine speed is
medium (1,000 to 2,000 rpm).Sound is reduced when fuel
injector connector of noisy
cylinder is disconnected.
(NOTE*)Worn crankshaft main bearing
Worn bearing at crankshaft end of connecting rod
Knocking sound when engine
is operating under idling speed
and engine is warm.Sound is reduced when fuel
injector connector of noisy
cylinder is disconnected.
(NOTE*)Worn cylinder liner and piston ring
Broken or stuck piston ring
Worn piston pin and hole at piston end of connecting rod
Sound is not reduced if each
fuel injector connector is
disconnected in turn. (NOTE*)Unusually worn valve lifter
Worn camshaft journal bore in crankcase
Squeaky sound—Insufficient generator lubrication
Rubbing sound—Defective generator brush and rotor contact
Gear scream when starting
engine—Defective ignition starter switch
Worn gear and starter pinion
Sound like polishing glass with
a dry cloth—Loose drive belt
Defective engine coolant pump shaft
Hissing sound—Loss of compression
Air leakage in air intake system, hoses, connections or
manifolds
Timing belt noise—Loose timing belt
Belt contacting case/adjacent part
Valve tappet noise—Incorrect valve clearance
NOTE*:
When disconnecting fuel injector connector, Malfunction Indicator Light (CHECK ENGINE light) illuminates and trouble code is stored in
ECM memory.
Therefore, carry out the CLEAR MEMORY MODE and INSPECTION MODE after connecting fuel injector connector. (Ref. to 2-7 On-Board
Diagnostics II System.)
80
2-3bDIAGNOSTICS
2. Engine Noise