Subaru 2002 Impreza Service Manual page 159

TIMING BELT
1
Mechanical
2. Timing Belt
0
A single timing belt drives four camshafts (intake and exhaust camshafts on each bank). The
belt also drives the water pump by its non-toothed side.
0
The timing belt teeth have a specially designed round profile which contributes to quiet opera-
tion. The timing belt is made of strong and inflexible core cords, wear-resistant canvas and heat-re-
sistant rubber material.
0
A hydraulic automatic belt tension adjuster always keeps the belt taut to the specified tension.
Any manual belt tension adjustment is unnecessary.
Timing indicator (For timing mark of crankshaft pulley) (9)
*Piston position mark (1 0)
Belt tension pulley (11)
Automatic belt tension adjuster assembly (1
2)
Alignment mark (1 3)
**Piston position mark (1 4)
Intake camshaft sprocket LH
(1 5)
Exhaust camshaft sprocket LH
NF0367
Water pump pulley
Idler No. 2
Timing belt
Crankshaft sprocket
Idler
Exhaust camshaft sprocket RH
Intake camshaft sprocket RH
*:
The #I piston is set at the top dead center (TDC) when the piston-position mark on the crankshaft
sprocket is aligned with the mark on cylinder block.
**:
The #1 piston is set at TDC on the compression stroke when the piston-position mark on the
camshaft sprocket is facing directly upward.
M E-3