Mazda X-5. Manual — part 15
MECHANICAL
01–10–11
01–10
• The detection unit (trigger plate) for the camshaft
position (CMP) sensor is at the intake port side
camshaft.
• The groove for securing the No.1 cylinder TDC for
the camshaft, is provided at the rear of the intake
and exhaust camshaft.
End Of Sie
5˚
30˚
62˚
32˚
42˚
TDC
EX
IN
BDC
VARIABLE DOMAIN
VARIABLE
DOMAIN
0˚
E5U110ZT5004
CAM JOURNAL
CAM HEEL
CAM NOSE
INTAKE CAMSHAFT
EXHAUST CAMSHAFT
THRUST
THRUST
CAM HEEL
CAM JOURNAL
CAM NOSE
E5U110ZT5017
DETECTION
PART FOR
CKP SENSORS
SST
E5U110ZT5044
MECHANICAL
01–10–12
CAMSHAFT SPROCKET CONSTRUCTION [LF]
E5U011012420N02
• The sintered alloy, which has high rigidity, has been adopted for the camshaft sprocket and is quenched to
improve the abrasion resistance at the contact point with the timing chain.
• The intake camshaft sprocket is integrated (cannot be disassembled) with the variable valve timing actuator.
End Of Sie
CRANKSHAFT SPROCKET CONSTRUCTION [LF]
E5U011012420N03
• High-strength chromium steel has been adopted for the crankshaft sprocket. Due to carbonizing protection,
abrasion resistance at all chain contact points is increased.
• The crankshaft sprocket consists of the timing chain sprocket and oil pump sprocket, which are integrated into
a single unit.
• The keyway on the crankshaft sprocket, used to position the crankshaft during installation, has been
eliminated.
Timing Drive Sprocket Specification.
Oil Pump Drive Sprocket Specification.
End Of Sie
CAMSHAFT SPROCKET
VARIABLE VALVE TIMING
ACTUATOR
E5U110ZT5005
item Specification
Outer diameter
(mm {in})
About
47.955 {1.8880}
Tooth width
(mm {in})
About
7.35 {0.289}
item
Specification
Outer diameter
(mm {in})
About
47.955 {1.8880}
Tooth width
(mm {in})
About
6.15 {0.242}
ENGINE FRONT
TOOTH WIDTH
OUTER
DIAMETER
TIMING CHAIN DRIVE SPROCKET
OIL PUMP DRIVE SPROCKET
E5U110ZT5018
MECHANICAL
01–10–13
01–10
TIMING CHAIN, CHAIN TENSIONER CONSTRUCTION [LF]
E5U011012040N01
• A silent chain (link grounding type) type has been adopted for the timing chain to reduce tapping noise caused
by matching each sprocket.
• Engine oil inside the engine front cover lubricates the timing chain and each sprocket. The pin part of the timing
chain is nitrite-treated to improve abrasion resistance.
Timing Chain Specification.
• Oil pressure type chain tensioner has been adopted for the timing chain tensioner. The tension of the timing
chain is maintained constant, using the oil pressure and the spring force in the chain tensioner.
• The oil pressure type chain tensioner consists of the following parts: Piston spring, which depresses the
tensioner arm, check ball which maintains pressure to the tensioner arm.
End Of Sie
item
Specification
Pitch size
(mm {in})
8 {0.32}
CAMSHAFT SPROCKET
CHAIN TENSIONER
CHAIN GUIDE
PIN
PITCH SIZE
TIMING CHAIN
CRANKSHAFT SPROCKET
TENSIONER ARM
E5U110ZT5006
OIL SUPPLY HOLE
CHECK BALL
PISTON SPRING
PISTON
RACK
RATCHET
RATCHET SPRING
CROSS-SECTION
HOLE FOR A RATCHET LOCK
E5U110ZT5019
MECHANICAL
01–10–14
TAPPET CONSTRUCTION [LF]
E5U011012431N01
• The tappet is a shimless tappet which is integrated with the shim.
• The tappet surface is phosphate-coated to smooth the attaching surface to the cam and improve abrasion
resistance.
• The valve clearance can be adjusted by replacing the tappet. There are 35 kinds of tappets depending on the
thickness. The tappet kind can be determined by the engraved identification mark (3 digits).
Tappet Specification.
End Of Sie
VARIABLE VALVE TIMING MECHANISM OUTLINE [LF]
E5U011012111N04
• A variable timing mechanism, which realizes optimum valve timing according to engine operation conditions by
continuously modifying the phases of the intake camshaft and crankshaft, has been adopted.
Discernment mark
Tappet thickness (mm {in})
The number of jumps (mm {in})
725—625
3.725—3.625 {0.1467—0.1427}
0.025 {0.00098}
602—122
3.602—3.122 {0.1418—0.1229}
0.02 {0.00078}
100—000
3.100—3.000 {0.1220—0.1181}
0.025 {0.00098}
TAPPET
CAMSHAFT
TAPPET SECTIONAL VIEW
CAM LOB CONTACT
SURFACE
VALVE STEM
CONTACT SURFACE
IDENTIFICATION MARK POSITION
E5U110ZT5020
TORQUE
ENGINE SPEED
LOW-MIDDLE SPEED ENGINE
HIGH SPEED ENGINE
ENGINE WITH VARIABLE VALVE TIMING MECHANISM
E5U110ZT5021
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