To remove the camshaft, do the following:
Remove the cylinder head cover after disconnecting the fuel lines on the left cover.
To rotate the crankshaft, put a socket wrench size 27 on the head of the central pulley mounting bolt.
Rotate the crankshaft until the nose of the first cam is in a vertical upward direction. Press the valve with a puller and remove the rocker arm. Sequentially remove the remaining rocker arms. When reusing, mark camshafts and rocker arms.
Rotate the crankshaft and move the key in the camshaft to the top position. Rotate the camshafts only by turning the crankshaft.
Using a screwdriver, remove the oil pipes. Places of fastening of a tube are shown by arrows in fig. 50.
Pic. 50. Removing the oil tube. Arrows show attachment points.
Paint the sprocket and drive chain as shown in fig. 51.
On vehicles with adjustable suspension, remove suspension hydraulic pump and lay to one side with lines. Remove pump drive parts.
While holding the camshaft with a wrench in the middle part from turning, unscrew the sprocket mounting bolt and remove the sprocket.
Pic. 51. Marking the drive chain and sprocket.
Sequentially unscrew the bolts of the camshaft bearing supports. The rear cylinder head bolt can only be removed by lifting the camshaft support (see fig. 19).
Raise the camshaft together with the supports and remove the shaft from the rear support.
When reusing the camshaft, carry out the above checks. In addition, check the bearings and, if necessary, grind the shaft journals.
When installing the camshaft, do the following:
Lubricate the bearing journals, install the bearing supports and install the camshaft assembly to the cylinder head. Before installing the supports, install the cylinder head bolt, as shown in fig. 19.
Lubricate the threads and bearing surfaces in the cylinder head and install the bolts.
Tighten the fastening bolts initially to 30 Nm and finally to 60 Nm. Tighten M8 bolts to 50 Nm.
Turn the camshaft to check for freedom of rotation.
Before installing the oil pipe, check the patency of all holes, if necessary, replace the pipe. Install the tube with a hammer with a plastic head. Put on the distance ring, aligning the groove with the key.
Put the drive chain on the sprocket, aligning the marks, install the sprocket on the camshaft with a wide protrusion to the shaft.
Screw in the bolt with washer and tighten to 100 Nm, securing the shaft from turning.
Install the rocker arms in accordance with the designation.
Do the rest of the work in reverse order.