Drive Belts - Subaru WRX-STI Owner's Manual

Drive belts

NOTE
For models except STI, it is unneces-
sary to check the deflection of the drive
belt periodically because your engine
is equipped with an automatic belt
tension adjuster. However, replace-
ment of the belt should be done
according to the maintenance schedule
in the "Maintenance schedule" F11-3.
We recommend that you consult your
SUBARU dealer for replacement.
If the drive belt is loose, cracked or
worn, contact your SUBARU dealer.
STI
1) Power steering oil pump pulley
2) Front side belt
3) Alternator pulley
4) Air conditioner compressor pulley
5) Rear side belt
6) Crank pulley
A) 98 N (10 kgf, 22 lbf)
CAUTION
The front side belt, which runs in
conjunction with the following com-
ponents, must be used within the
specified deflection.
. Power steering oil pump pulley
. Alternator pulley
. Crank pulley
Check the deflection of the front
Maintenance and service/Drive belts
side belt and if there is any loosen-
ess, cracks, wear or unusual noise
on the front side belt, we recom-
m e n d t h a t y o u co n t a c t y o u r
SUBARU dealer.
Continuing to use the vehicle with
the belt outside of the specification
may cause the engine to malfunc-
tion and the above components to
malfunction.
To check the deflection of the front side
belt, place a straightedge (ruler) across
two adjacent pulleys (alternator pulley and
crank pulley) and apply a force of 98 N (10
kgf, 22 lbf) midway between the pulleys by
using a spring scale. The belt deflection
should be the amount specified. If the front
side belt is loose, cracked or worn, we
recommend that you contact your
SUBARU dealer.
Deflection
New belt
7.0 9.0
A
(0.28 0.35)
The rear side belt is a stretch-type belt,
therefore the deflection and tension do not
need to be checked. If there are cracks or
wear confirmed on the belts and a
11-25
mm (in)
Used belt
9.0 11.0
(0.35 0.43)
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