CAMSHAFT CONSTRUCTION [MZR 2.0 DISI]
id011007101300
• A cast iron camshaft with six bearings on the intake air side and five bearings on the exhaust side has been adopted.
• 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.
• The cam nose part is chill coasted to improve the abrasion resistance and the width of cam hill part is shortened to reduce the weight.
• There is 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 intake port side camshaft (front of camshaft).
Camshaft specification
Item
|
Specification
|
Intake
|
Exhaust
|
Lift
|
(mm {in})
|
9.1 {0.36}
|
7.7 {0.30}
|
Valve timing
• The groove for securing the No.1 cylinder TDC for the camshaft is provided at the rear of the intake and exhaust camshaft.
• The high pressure fuel pump drive cam and CMP sensor detection lobe are located at the rear of the intake camshaft.