Camshaft sprockets
1. Removal, inspection and installation of sprockets is described in paragraph 7 as part of the procedure for removing and installing the secondary chain.
Crankshaft sprocket
Withdrawal
2. The camshaft drive sprocket is integrated with the oil pump drive sprocket. On some models, the sprocket may be pressed onto the crankshaft nose.
3. Remove the primary circuit as described in paragraph 7.
4. Remove the sprocket from the nose of the crankshaft. If the sprocket is pressed onto the shaft, use a three-jaw puller. To sew up the threaded hole for the hub mounting bolt in the center of the shaft, temporarily screw the bolt into the hole. Remember which side the asterisk is facing outward in order to install it correctly in the future,
5. After removing the sprocket, see if the key holds well on the toe of the shaft. If bad, remove it and save it.
Inspection
6. Inspection of sprockets is described in paragraph 7.
Installation
7. Insert the key into the groove of the shaft (if the key has been removed).
8. Slide the sprocket onto the nose of the shaft. If the sprocket has been installed with a press fit, heat it to 150°C before installing the sprocket. Do not exceed this temperature or the sprocket material will lose its strength characteristics.
9. After heating the sprocket, align its groove with the key and press the sprocket onto the shaft using a pipe of suitable diameter.
Attention! If the sprocket has been heated, be careful - the metal can remain hot for a long time.
10. Install the primary circuit as indicated in paragraph 7.
Secondary target tensioner
Withdrawal
11. Remove the secondary circuit as indicated in paragraph 7.
12. Turn out bolts and remove the case of a tensioner from a head of cylinders (see fig. 7.28).
13. Pull out the fixing rod that held the plunger in the depressed position, remove the plunger and spring (pic. 8.13).
Inspection
14. Inspect the tensioner and, if necessary, replace it. Inspect the plunger and its bore for wear and damage. Inspect the tensioner spring and check its condition. Inspect the running surface of the tensioner shoe for wear. Replace worn or damaged parts.
15. When installing the plunger, keep in mind that after the tensioner is in place, the notch in the plunger must be directed towards the right side of the engine.
Installation
16. Reinstall the tensioner and securely tighten the bolts of its fastening.
17. Insert a rod or drill to fix the tensioner in the depressed state.
18. Install the secondary circuit as indicated in paragraph 7.
Primary tensioner
19. Removal and installation of the tensioner is described in paragraph 7 as part of the procedure for removing and installing the primary chain.