Removal and installation the cylinder head (injector) (Nissan Primera P10)

The following description describes the work that is required if the cylinder head and timing gear are installed. The description also includes the removal and installation of the camshafts. Due to the differences between the carburetor and injection engines, the work is described separately. The main difference between the carburetor and injection engines is the use of one drive chain in the injection engine, and two chains in the carburetor. In the following description, some work is given only as instructions. To perform specific operations, read the corresponding section of the manual.





1. Reduce the pressure in the fuel system as described in Section Removal and installation the engine. To do this, take out the one shown on illustrations fuse.

2. Unscrew all panels located under the front of the car.

3. Place the front of the car on supports, unscrew the right wheel and unscrew the shield in the front right wheel arch.

4. Drain the coolant as described in Chapter Cooling and heating systems.

5. Remove the radiator.

6. Remove the air intake hose to the intake manifold.

7. Loosen and remove the drive belt on the end side of the engine. Unscrew the water pump belt pulley.

8. Remove the generator.

9. Remove the power steering pump.

10. Remove the throttle cable.

11. Remove all spark plugs.

12. Remove the cylinder head cover. To avoid overtightening the cover, a certain sequence must be followed when loosening the bolts. It is shown in the illustration below. On the cylinder head side there is an oil deflector that must be removed.



13. Unscrew all the intake manifold supports. The SR20DE engine uses several supports, which are shown in illustrations. The SR20Di engine uses only one support.



14. Remove the oil filter cartridge and power steering pump console.

15. Turn the crankshaft (by installing a socket head on the crankshaft belt pulley bolt), until the mark on the belt pulley is opposite the pointer on the timing gear cover (see illustration below). In this position, the control marks of each camshaft drive gear are in the position shown in the illustration.



16. Remove the nut and bolt and lift the chain tensioner out of the cylinder head. There is a gasket and an O-ring on the tensioner. Both parts should be replaced.

17. Remove the distributor cap and inspect the distributor head. The distributor rotor will be in the position shown in the illustration. To remember this position, draw a line on the distributor body opposite the middle of the rotor with a scriber. Then remove both bolts (arrows) and take out the distributor.





18. Loosen the two bolts and remove the chain guide.

19. Loosen both camshaft sprocket bolts. The shafts should be held from turning. Behind the sprocket, the shaft has a hexagon on which an adjustable wrench can be installed, as shown in the illustration below.



20. Remove the camshaft bearing caps, camshafts, oil pipe and conductive plate. When loosening the bearing caps, a certain sequence must be followed. It is shown in the illustration below.



21. After loosening the hose clamps, disconnect the following hoses: the hose to the cylinder block, the hoses from the heater and, if available, the water hose from the oil cooler.



22. On the SR20DE engine, remove the starter. Also on this engine, the water pipe should be unscrewed.

23. Remove the cylinder head bolts on the outside. They are located in the locations shown in the illustration below, three near the water pump pulley and one near the distributor.



24. Loosen the cylinder head bolts from the outside to the middle in even passes and lift the cylinder head. The intake manifold and exhaust pipe remain on the head. The illustration below shows the sequence for loosening the bolts. If the head is stuck to the block, you can tap it with a rubber mallet. Never try to insert a screwdriver between the sealing surfaces. Place the head on a workbench if it is to be disassembled or repaired.





Information obtained from the website NISSANBOOK.ru

25. Remove the oil pan (Chapter Cooling and heating systems).

26. Remove the oil suction screen and oil conductive plate from the bottom of the crankcase.

27. Loosen the crankshaft pulley bolt. You can engage the gear to prevent the shaft from turning. Press the belt pulley with two tire irons. A firmly seated camshaft can be removed with a puller. There are two threaded holes in the belt pulley to install the puller shown in the illustration below.



28. The engine should now be lifted from its supports. To do this, you can use a mobile lift with a suitable steel plate so that the plate rests against the crankshaft main bearing frame.

29. Remove the front engine mount.

30. Unscrew the timing gear cover on the end of the engine. A total of 9 bolts should be loosened.

31. Loosen the bolts shown in the illustration below and remove the right (1) and left (2) chain guides.





32. Remove the drive chain, if necessary, remove the crankshaft sprocket. Remember how it is put on. Thoroughly clean and inspect all parts, especially the timing gear drive parts. Worn sprockets are recognized by very shiny spots, which can also be seen on the chain rollers. Checking the cylinder head parts, including the camshafts, is discussed below. When installing the timing gear drive parts and the cylinder head, proceed in the following sequence. All necessary tightening torques are indicated on illustrations, they are also indicated in the text.

33. Drive the sprocket onto the crankshaft. The sprocket flange should face the crankshaft. Make sure the key enters correctly.

34. Turn the crankshaft so that the key in the sprocket is vertically upward. The control mark on the sprocket is in the 4 o'clock position. Inspect the chain and find the marked link. On one side of the chain, you can find two marks, 20 links apart. They are for the camshafts. If you count 48 links, you can find the mark for the crankshaft. This link also has a different color from the other two. Place the chain on the crankshaft sprocket so that the marks match.

35. According to illustrations install and tighten the chain guides. Hang the chain at the top in a loose position.

36. Remove the old gasket from the timing cover and from the cylinder block sealing surface and apply sealant to the sealing surfaces (strip 2-3 mm wide). Put on the spacer element (20) of the oil pump drive (illustration) and screw the cover to the cylinder block. Remove all the displaced sealant.



37. Reinstall the front engine mount and remove the jack.

38. Drive the crankshaft pulley onto the shaft and tighten the bolt. While doing this, hold the crankshaft from turning. The "0" mark on the pulley should be opposite the pointer in the timing cover (compare with illustration).

39. Install the oil suction screen and oil conductive plate.

40. These works are described in Chapter Cooling and heating systems.

41. Lubricate the joints between the timing cover and the cylinder block with a small amount of sealant and apply the cylinder head gasket.

42. Install the cylinder head with the intake manifold and exhaust manifold and tap it in place with a rubber hammer.

43. Before installing the cylinder head bolts, they should be measured. If the distance from the end of the thread to the underside of the bolt head exceeds 158.2 mm, the corresponding bolt must be replaced.

44. Tighten the cylinder head bolts in the reverse order shown in illustrations. Lubricate the bolt threads and the bottom of the bolt head with oil and tighten all bolts with your fingers. Tighten the bolts as follows:

• Tighten all bolts according to the diagram in Illustration 4.24 to 40 Nm.
• Tighten all bolts according to the diagram in Illustration 4.24 to 80 N·m.
• Loosen all bolts completely.
• Tighten all bolts according to the diagram in Illustration 4.24 to 35 - 45 Nm.
• Tighten all bolts to the specified angle in the sequence shown in illustrations. All bolts should be tightened to an angle of 90 - 100°.
• To properly maintain the angle, you need a template that you should make yourself. Cut a circle out of cardboard and divide it into four equal segments of 90°. Divide one of the segments as shown in illustrations, to mark the 90 - 100° area. Exactly in the middle of the template, cut a square hole the size of the socket head and extension you are using. When tightening, proceed as follows:

• Place the template on the extension and insert the extension into the socket head.
• Place the head on the bolt (10) (see illustration) and align point "0" with any point on the cylinder head.
• Now tighten the bolt until the 90 - 100° mark is reached.
• Tighten the remaining bolts in the same manner, maintaining the angle as accurately as possible.
• In the same way, tighten the bolts by another 90 - 100°. In no case should you tighten the bolts immediately by 180 - 200°, i.e. by half a turn. Tightening to a given angle should be done in two passes.

45. Screw in the 4 cylinder head bolts on the outside.

46. On the SR20DE engine, install the water pipe. Also on this engine, reinstall the starter.

47. Connect all water hoses. Check if hoses and clamps can be reused.

48. Clean the surface of the outer bearing cap of the left camshaft from the remains of the sealant and also clean the mounting side of the cylinder head from it. Then cover the mating surfaces with sealant.

49. Grease the camshaft bearing journals well and insert into the bearing holes. Rotate the camshafts until the end surface guide pins are in the following position:

• The pin of the right shaft should be vertically upwards (12 o'clock)
• The left shaft pin should also be facing up (but for 10 hours)

50. Now tighten the camshaft bearing caps. This job is quite complicated and should be done using the illustrations as a guide Tightening sequence of camshaft bearing caps. The large cap is for the left camshaft and Individual bolts mentioned in the text are designated by letters from A to D below. One illustration shows the tightening sequence, the other illustration shows different bolts that have different tightening torques. Proceed as follows:

• When tightening the right camshaft, tighten bolts (9) and (10) and then bolts (1) to (8) in the specified sequence to a torque of 2 Nm.
• When tightening the left camshaft, tighten bolts (11) and (12) and then bolts (1) to (10) in the specified sequence to a torque of 2 Nm.
• Tighten all bolts in the above sequence to 6 N·m.
• Tighten all bolts as indicated on illustrations letters A, B and C, in the sequence given above with a force of 9-12 Nm.
• Tighten all bolts as indicated on illustrations letter D, with a force of 18 - 25 Nm.

51. Install the camshaft sprockets (connecting with guide pins), while installing the chain. The marks on the sprockets and chain links should match, as can be seen from illustrations.

52. Screw in the bolts, holding the camshafts (see illustration) tighten the bolts to 14-16 Nm.

53. Install the chain guide (6) (see illustration).

54. Install the ignition distributor. The receiving slot in the camshaft must be horizontal. After installation, compare the distributor with illustration.

55. Install the chain tensioner. Refer to the illustration to tension the tensioner. To do this, press the locking latch (1) inward and push the piston (2) into the tensioner until the hook (4) can be snapped over the pin (3). Screw the tensioner with the arrow to the front of the engine. After tightening the tensioner, the hook (4) is released and the tensioner is automatically engaged.



56. Screw in the oil filter base and power steering pump console.

57. Install the supports or intake manifold support.

58. Remove all gasket residue from the cylinder head and cylinder head cover sealing surfaces and coat both surfaces with sealant.

59. Apply the gasket and tighten the mounting nuts in the reverse order illustrations. First tighten the nuts in the middle, starting with nuts (4), (3), (1) and (6), to 4 Nm. Then tighten all the nuts in reverse order to 8 - 10 Nm. Again, the nut in the middle is tightened first.

60. Perform all other work in the reverse order of removal.