Intake Valve Shaft Bearing Cap Bolt Tightening Sequence (right head)
Intake Valve Shaft Bearing Cap Bolt Tightening Sequence (left head)
Tightening Sequence of Exhaust Valve Shaft Bearing Cap Bolts (right head)
Tightening Sequence of Exhaust Valve Shaft Bearing Cap Bolts (left head)
Removal
1. Set the first piston to TDC. Remove the head covers, timing belt and camshaft sprocket.
2. Check that the timing marks on the shaft gears are aligned.
3. Lock the exhaust valve shaft auxiliary gear by screwing the bolt into the holes of the auxiliary and main gears.
4. Loosen the intake valve shaft bearing cap bolts in the reverse order of tightening (see Fig. Intake valve shaft bearing cap bolt tightening sequence (right head), fig. Sequence of tightening the bolts of the intake valve shaft bearing caps (left head). Remove the bearing caps and take out the shaft.
5. Loosen the exhaust valve shaft bearing cap bolts in the reverse order of tightening (see Fig. Exhaust valve shaft bearing cap bolt tightening sequence (right head), fig. Sequence of tightening the bolts of the exhaust valve shaft bearing caps (left head)). Remove the covers and take out the shaft.
6. Remove the shafts of the other head in the same way.
7. Place the bearing caps in the correct order.
8. To disassemble the exhaust valve shaft gear, secure the shaft in a vice. Using a special key, loosen the pressure on the bot screwed into the gears and unscrew it.
9. Remove the auxiliary gear retaining ring.
10. Remove the auxiliary gear (3), spring (2) and washers (1).
Examination
See. subsection 3.1.10.
Installation
1. Install the auxiliary gear and its components.
2. Secure the shaft in a vice and screw the bolt back into the shaft gear holes. Lubricate the valve lifters with multi-purpose grease (if you filmed them) and install them into the appropriate slots.
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3. Lubricate the cams and bearing journals of the exhaust valve shaft with special grease, and install the shaft into the head. The marks on the gear should be directed towards the exhaust valve shaft (in the picture on the right - the right head, on the left - the left).
4. Apply sealant to the outer mating surfaces of the first bearing cap (marked with hatching).
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5. Install the bearing caps in the numbered order. The arrows on the caps should point towards the timing belt (in the picture on the right is the right head, on the left is the left head).
6. Tighten the cover bolts to the specified torque. Tighten the bolts in the sequence shown, one-quarter of a turn at a time (see Fig. Exhaust Valve Shaft Bearing Cover Bolt Tightening Sequence (right head), fig. Sequence of tightening the bolts of the exhaust valve shaft bearing caps (left head)).
7. Install a new shaft seal.
8. Lubricate the cams and bearing journals of the intake valve shaft with special grease.
9. Install the shaft into the head, aligning the marks on the shaft gears.
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10. Install the bearing caps in the numbered order. The arrows on the caps should point towards the timing belt (in the picture on the right is the right head, on the left is the left head).
11. Tighten the cap bolts to the specified torque. Tighten the bolts in the sequence shown, one-quarter of a turn at a time (see Fig. Intake Valve Shaft Bearing Cap Bolt Tightening Sequence (right head), fig. Sequence of tightening the bolts of the intake valve shaft bearing caps (left head)).
12. Remove the locking bolt from the intake valve shaft gears.
13. Install the shaft sprockets and timing belt.
14. Install the remaining parts.