CAMSHAFT CONSTRUCTION [L3 Turbo]
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• The cast iron 5 axis-hole, which has great rigidity, has been adopted for the camshaft to insure higher reliability.
• The endplay of the camshaft is regulated at the rear of the No. 1 journal.
• The lubricating oil is supplied through the oil supply hole at each journal. Additionally the cam nose part is chill casted to improve the abrasion resistance and the width of cam hill part is shortened to reduce the weight.
• There shall be no positioning pin or key slot for the camshaft sprocket at the edge of the camshaft. The lubrication process has been adopted for the camshaft sprocket tightening bolt to prevent instability in the axis during tightening.
• There is an oil line, by which the oil is supplied to the variable valve timing actuator, located at the L3 engine models intake port side camshaft (front of camshaft).
Camshaft specification
|
Item
|
L3 Turbo
|
|
Intake
|
Exhaust
|
|
Lift
|
(mm {in})
|
9.1 {0.35}
|
7.8 {0.31}
|
|
Overlap
|
(°)
|
5-35
|
Valve timing
.
|
1
|
TDC
|
|
2
|
Variable domain
|
|
3
|
Exhaust air
|
|
4
|
Variable domain
|
|
5
|
BDC
|
|
6
|
Intake air
|
• The fuel pump drive cam and CMP sensor detection lobe are located at the rear of the intake camshaft.
.
|
1
|
Exhaust camshaft
|
|
2
|
Cam heel
|
|
3
|
Cam nose
|
|
4
|
Thrust
|
|
5
|
Cam journal
|
|
6
|
Intake camshaft
|
|
7
|
Thrust
|
|
8
|
Cam nose
|
|
9
|
CMP sensor detection lobe
|
|
10
|
Fuel pump drive cam
|
|
11
|
Cam journal
|
|
12
|
Cam heel
|
.
|
1
|
Fuel pump drive cam
|
|
2
|
CMP sensor detection lobes
|
