5.13. Camshafts and pushers

Removal

Marking arrangement on a camshaft bearing cover

Arrangement of covers of bearings of camshafts which need to be unscrewed and removed first of all

Arrangement of persistent half rings

Extraction of hydraulic pushers from a head of the block of cylinders

PERFORMANCE ORDER
1. Install the piston of the first cylinder in VMT and check that all adjusting tags are combined with indexes.
2. Remove an asterisk of the bent shaft operating final valves.
3. Remove a driving chain from an asterisk of the camshaft operating inlet valves and, using a wire, fix a chain from falling.
4. Check existence of marking on covers of bearings of the camshaft and, at absence, put it. Covers of bearings of the camshaft operating final valves are numbered from 1 to 7 from a driving chain (see rice. A marking arrangement on a camshaft bearing cover), and covers of bearings of the camshaft operating inlet valves are numbered by figures from 8 to 14 from a driving chain.
5. Gradually and consistently unscrew bolts of fastening of covers of bearings 1, 4, 6 and 7 of the camshaft operating final valves and covers 8, 9, 12 and 14 camshafts, operating inlet valves (see rice. Arrangement of covers of bearings of camshafts which need to be unscrewed and removed first of all). Uncover.
6. Gradually and consistently on one turn for each pass unscrew bolts of fastening of the remained covers of bearings of the camshaft. Uncover.
7. On engines of 3,0 l remove persistent half rings about covers of bearings 1, 8, 4 and 11 (see rice. Arrangement of persistent half rings).
8. Remove camshafts from a head of the block of cylinders.
9. From nests in a head of the block of cylinders take hydraulic pushers of valves. Arrange hydraulic pushers in a container with pure engine oil in vertical position so that they could be established on the places (see rice. Extraction of hydraulic pushers from a head of the block of cylinders).

Check

PERFORMANCE ORDER
1. Check the working surfaces of bearings of the camshaft and contours of cams for wear signs. With any wear the camshaft is subject to replacement.
2. Check a condition of hydraulic pushers and nests for pushers in a head of the block of cylinders. With wear on nests for pushers the head of the block of cylinders is subject to replacement.

Installation

Arrangement of covers of bearings of camshafts which need to be established first of all

PERFORMANCE ORDER
1. Oil hydraulic pushers pure engine and insert each pusher on the place in a head of the block of cylinders.
2. Grease necks and cams of camshafts with pure engine oil and install camshafts in a head of the block of cylinders.
3. Turn camshafts in such situation that cams of the cylinder No. 2 of the camshaft operating final valves, and cams of the cylinder No. 3 of the camshaft operating inlet valves were directed down. At the same time adjusting openings on flanges of camshafts have to be combined with the top plane of a head of the block of cylinders.
4. On engines of 3,0 l install persistent half rings on bearings 1, 8, 4 and 11.
5. Grease the working surfaces of bearings in covers of bearings of the camshaft, then establish covers 2, 3 and 5 camshafts, operating final valves, and covers 10, 11 and 13 camshafts, operating inlet valves, and establish bolts in covers (see rice. Arrangement of covers of bearings of camshafts which need to be established first of all).
6. Tighten bolts of fastening of covers of bearings of the camshaft a hand, then on a spiral from the center to edge tighten fastening bolts, turning each bolt on a half of a turn for one pass until each cover does not concern a head of the block of cylinders. Then in the same sequence tighten bolts the required moment in several stages.
7. Establish the remained covers of bearings of camshafts and similarly tighten them the required moment.
8. Establish a driving chain on an asterisk of the camshaft operating inlet valves according to earlier made tags.
9. Establish an asterisk of the camshaft operating final valves.
10. Check a starting position of camshafts.