Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 01. GENERAL INFORMATION 09. PERIODIC MAINTENANCE SERVICES 07. Timing Belt
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TIMING BELT
PERIODIC MAINTENANCE SERVICES
7. Timing Belt 10) Remove the timing belt guide. (MT model)
A: REPLACEMENT
1. SOHC MODEL
1) Remove the radiator fan and air conditioner fan.
,
2) Shield the radiator from any damage using card-
board and blanket.
3) Remove the V-belt cover. PM-00008
11) Turn the crankshaft and align alignment marks
on crankshaft, and right and left camshaft sprock-
ets with notches of belt cover and cylinder block.
ST 499987500 CRANKSHAFT SOCKET
(B)
PM-00003
4) Remove the V-belts.
5) Remove the air conditioning compressor drive
belt tensioner.
6) To lock the crankshaft, use ST. Remove the pul-
ley bolt.
ST 499977100 CRANKSHAFT PULLEY
WRENCH (A)
(B)
ST
PM-00009
(A) Notch
(B) Alignment mark
PM-00007
7) Remove the crankshaft pulley. 12) Remove the belt idler.
8) Remove the left side belt cover. 13) Remove the belt idler (No. 2).
9) Remove the front timing belt cover.
PM-00010
14) Remove the timing belt.
PM-11
TIMING BELT
PERIODIC MAINTENANCE SERVICES
15) Remove the automatic belt tension adjuster as- 11) Remove the timing belt guide. (MT model)
sembly.
PM-00008
PM-00011
16) Install in the reverse order of removal.
2. DOHC MODEL
1) Remove the radiator fan and air conditioner fan.
,
2) Protect the radiator with cardboard and blanket. ME-00727
3) Remove the V-belts.
4) Remove the air conditioning compressor drive
belt tensioner.
5) Remove the pulley bolt. To lock the crankshaft
use ST.
Except for STi model:
ST 499977400 CRANKSHAFT PULLEY
WRENCH
STi model:
ST 499977100 CRANKSHAFT PULLEY ME-00728
WRENCH
ST ME-00729
PM-00093
6) Remove the crankshaft pulley.
7) Remove the air conditioning compressor drive
belt tensioner.
8) Remove the belt cover (LH).
9) Remove the belt cover (RH).
10) Remove the front belt cover.
PM-12
TIMING BELT
PERIODIC MAINTENANCE SERVICES
12) Turn the crankshaft and align alignment marks 15) Remove the automatic belt tension adjuster as-
on crankshaft, and right and left camshaft sprock- sembly.
ets with notches of belt cover and cylinder block. To
turn the crankshaft, use ST.
ST 499987500 CRANKSHAFT SOCKET
(A)
(B) (B)
(B) (B)
PM-00096
(A) (A)
16) Install in the reverse order of removal.
CAUTION:
When installing the timing belt, be sure to align
(B) all alignment marks on the belt with corre-
sponding marks on the sprockets. If incorrectly
installed, interference between pistons and
valves may occur.
B: INSPECTION
1. SOHC MODEL
1) Remove the front timing belt cover and timing
PM-00156 belt cover (LH).
2) While cranking the engine at least four rotations,
(A) Notch check the timing belt back surface for cracks or
(B) Alignment mark damage. Replace the faulty timing belt as needed.
3) Measure the timing belt width W. If it is less than
13) Remove the belt idler. 27 mm (1.06 in), check idlers, tensioner, water
pump pulley and cam sprocket to determine idler
alignment (squareness). Replace the worn timing
belt.
W
PM-00095
14) Remove the timing belt.
PM-00016
4) Install the front timing belt cover and timing belt
cover (LH).
PM-13
TIMING BELT
PERIODIC MAINTENANCE SERVICES
2. DOHC MODEL
1) Remove the timing belt cover (LH).
2) While cranking the engine at least four rotations,
check the timing belt back surface for cracks or
damage. Replace the faulty timing belt as needed.
3) Measure the timing belt width W. If it is less than
30 mm (1.18 in), check idlers, tensioner, water
pump pulley and cam sprocket to determine idler
alignment (squareness). Replace the worn timing
belt.
4) Install the timing belt cover (LH).
W
PM-00097
PM-14
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