Pic. 2.43. Camshafts and tappets
Disassembly
Disconnect the battery.
Drain the coolant.
Disconnect the crankcase ventilation hose.
Remove the air filter.
Remove the timing belt cover.
Turn away bolts of fastening of a cover of a head of cylinders, remove a cover and the gauge of position of a cranked shaft.
Pic. 2.44. Removing camshaft sprockets
Remove the camshaft sprockets (pic. 2.44).
Turn away bolts of fastening of covers of bearings of camshafts. Remove the bearing caps, camshafts, tappets and gap compensators.
Attention! Turn away bolts of fastening of covers of bearings in several steps in order to avoid deformation of a camshaft.
Checking pushers
Check up smoothness of rotation of a roller of a pusher. In case of uneven rotation or with increased clearance, replace the pusher.
Assess the condition of the roller surface. In case of chips or metal enveloping, replace the pusher.
Pic. 2.45. Checking the contact surface of the pusher
Check the condition of the contact surface of the pusher (tip) with valve. If the tip is worn, replace the plunger (pic. 2.45).
Checking the camshaft
Pic. 2.46. Checking the camshaft journals
Check the camshaft journals for wear. If the shaft journals are significantly worn, replace the camshaft (pic. 2.46).
Check the tops of the camshaft cams for damage. If the shaft cams are damaged or their wear exceeds the allowable value, then replace the camshaft.
Camshaft lobe height
Rated value:
Intake - 35.493 mm.
Graduation:
- (2.4L) Manual transmission - 35.204 mm;
- (2.0L) Manual transmission - 35.317 mm;
- Automatic transmission - 35.204 mm.
Maximum allowable value:
Intake - 34.993 mm.
Graduation:
- (2.4L) Manual transmission - 34.704 mm;
- (2.0L) Manual transmission - 34.817 mm;
- Automatic transmission - 34.704 mm.
Assembly
Lay the camshafts in the bed of bearings in the head. Pushers do not need to be installed.
Note. Lubricate the necks and cams of the shafts with engine oil.
Pic. 2.47. Slot for installation of the crankshaft position sensor
The exhaust camshaft at the rear end has a slot for installing a crankshaft position sensor (pic. 2.47).
Pic. 2.48. Marks on the camshaft bearing caps
Install the camshaft bearing caps. Marks on bearing caps indicate mounting locations (intake/exhaust valve side) (pic. 2.48).
I: intake camshaft.
E: exhaust camshaft.
Pic. 2.49. Installation of pushers
Tighten the camshaft bearing cap bolts to the rated torque. Check the smoothness of rotation of the shafts. Remove bearing caps and install pushrods (pic. 2.49).
Pic. 2.50. Camshaft Installation Diagram
Install the camshafts so that the guide pins are located as shown in Figure 2.50.
Pic. 2.51. The order of tightening the bolts of the camshaft bearing caps
Tighten bolts of fastening of covers of bearings of camshafts the nominal moment in two-three receptions and in the sequence shown in drawing 2.51.
Note. Make sure the rocker arm is properly seated on the hydraulic lifter and valve stem.
Note. The moment of an inhaling of a bolt of fastening of a cover of the bearing of a camshaft: 19–21 Н·м.
Pic. 2.52. Pressing the camshaft oil seal with a special tool
With a special tool (mandrel for installing the camshaft oil seal: 09221-21000, 09221-21100) press in the camshaft seal (pic. 2.52).
Lubricate the sealing lip of the oil seal with engine oil. Slide the oil seal onto the camshaft from the timing belt sprocket side, then install the oil seal until it stops with a hammer on the mandrel.
Install the camshaft sprockets and tighten the mounting bolts to the specified torque.
The moment of an inhaling of a bolt of fastening of an asterisk of a camshaft: 80–100 Н·м.
Pic. 2.53. Valve cover installation
Install the valve cover (pic. 2.53).
Pic. 2.54. Bolts of fastening of a cover of a head of cylinders and the central cover: And – 13 EA (cylinder head cover); B - 4EA (central cover).
Tightening torque of cylinder head cover bolts: 8–10 Nm, center cover bolts: 4–5 Nm (pic. 2.54).
Sealant used when installing the cylinder head cover:
- zone A - Three Bond No. 10 or equivalent;
Pic. 2.55. Sealant application areas
- zone B - Three Bond No. 1212D or equivalent (pic. 2.55).
Pic. 2.56. High voltage wires
Install spark plugs and ignition coils. Connect the high voltage wires and install the center cover (pic. 2.56).
Pic. 2.57. Installing the guide pin of the intake camshaft sprocket
Establish a directing pin of an asterisk of an inlet camshaft, as it is shown in drawing 2.57.
Pic. 2.58. Crankshaft Position Sensor Cylinder and Rotor Support Installation
Install the Crankshaft Position Sensor Cylinder and Rotor Support (pic. 2.58).