Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Impreza 2001-2002.2004-2007 Approved Subaru Impreza 2004 WRX STi 08. MECHANISM AND FUNCTION 25. MECHANICAL (STi) 05. Camshaft
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W1860BE.book Page 7 Tuesday, January 28, 2003 11:01 PM
CAMSHAFT
MECHANICAL
5. Camshaft
The DOHC engine uses four camshafts in all; intake and exhaust camshafts on each of the right
and left banks.
The camshafts are of a composite material type using sintered steel for cam lobes and carbon steel
for pipe part.
The sintered steel cams are very high in the resistance to wear, which enables the cam lift to be
increased. In addition, use of the sintered steel cams contributes to reduction in weight.
Each camshaft is supported at its three journals and held in position by three camshaft caps. Each
camshaft has a flange which fits in the corresponding groove in the cylinder head to receive thrust
forces generated in the camshaft.
With the engines for the STi models, each intake camshaft has slots at the rear end for the variable
valve timing position sensor.
ME(STi)-7
W1860BE.book Page 8 Tuesday, January 28, 2003 11:01 PM
CAMSHAFT
MECHANICAL
(3)
(1)
(4)
(2)
(2)
(2)
(3)
(5)
(2)
(2) (2)
(3)
(4)
(6)
(4) (2) (2) (2)
(3)
(7)
(2) (2) (2)
ME-00790
(1) Intake camshaft LH (5) Exhaust camshaft LH
(2) Journal (6) Intake camshaft RH
(3) Flange (7) Exhaust camshaft RH
(4) Slots for variable timing position sensor
ME(STi)-8
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