Replacement of the cylinder head gasket for QG16DE and QG18DE engines Nissan Primera 2001-2007

Tools:

• Pliers
• Open end wrench - 13 mm
• Open end wrench - 17 mm
• Wrench attachment - 10 mm
• Wrench attachment - 13 mm
• Wrench attachment - 17 mm
• Collar for end attachment
• Allen key - 10 mm
• Nippers
• Ruler
• Probe
• Milling and grinding machine

Torque wrench

Parts and consumables:

• Cylinder head gasket
• Coolant
• Container for coolant
• Engine oil

Notes:

If there is a leak of engine oil - or coolant at the joints of the cylinder head with the cylinder block, remove the head and replace its gasket. Leaks can also occur due to warpage of the block head due to overheating.

Replacement of the cylinder head gasket for QG16DE and QG18DE engines Nissan Primera

1. Decrease the pressure in the power supply system if performing work immediately after a trip.

2.  Disconnect the wire from the negative terminal of the storage battery.

3. Drain the coolant.

4. Remove the ignition coils.

5. Set the piston of the 1st cylinder to the TDC position of the compression stroke. More details here .

6. Remove the nuts of the studs securing the exhaust manifold to the cylinder head and disconnect the manifold from the head.

7. After loosening the clamp securing the air supply hose to the throttle assembly, remove the hose from the choke assembly.

8. Squeeze the tendons of the crankcase ventilation hose clamp.

9. Disconnect the hose from the intake manifold fitting.

10. Disconnect the vacuum brake booster hose in the same way.

11. Squeeze the tendrils of the clips.

12. Disconnect the engine cooling system hoses from the connections on the cylinder head.

13. Cut the clamps securing the wiring harness to the brackets on the cylinder head and disconnect the harness from the clamp.

14. Remove the bolts securing the terminals of the "ground" wires to the cylinder head.

15. Disconnect the terminals with wires from the cylinder head.

16. Press on the clips of the harness blocks and disconnect the blocks from the injector leads, throttle assembly and coolant temperature sensor.

17. Press down on the plastic retainer on the canister purge valve harness connector and disconnect the connector from the valve leads.

18. Squeeze the tendrils of the clamp of the supply hose from the adsorber to the valve and remove the hose from the valve union.

19. Loosen the clamp fastening the fuel supply hose to the fuel rail.

20. Disconnect the hose from the ramp fitting.

21. Remove the bolt securing the generator bracket to the cylinder head and move the bracket with the generator to the side.

22. Remove the camshafts.

23. Remove the bolts securing the right and left supports to the intake manifold.

24. Loosen the fourteen bolts securing the cylinder head to the cylinder block in the sequence shown in the photo.

Notes:

The cylinder head bolts can only be removed when the engine is cold.

25. Remove the cylinder head from the engine.

Note:

Have an assistant remove the cylinder head as it is quite heavy.

26. Clean the head and block mating surfaces.

27. Check the block head for warpage. To do this, placing the ruler with an edge on the surface of the head, first in the middle along, then across and along the diagonals, measure the gap between the surface of the head and the ruler with a feeler gauge. Grind the cylinder head if the clearance is greater than 0.1 mm.

28. Install the cylinder head in the reverse order of removal.

Notes:

Remove oil and coolant from the threaded holes of the cylinder head bolts that got there when the head was removed.

Be sure to install a new head gasket and do not reuse it.

Lubricate the bolts with engine oil.

Tighten the bolts on a cold engine in the order shown in the photo in six steps:

• 1  - tighten bolts 1-10 to 29 Nm.
• 2  - tighten bolts 1-10 to 58.8 Nm.
• 3  - completely loosen bolts 1-10.
• 4  - tighten bolts 1-10 to 29.4 Nm.
• 5  - tighten bolts 1-10 by 50-55 ° - clockwise.
• 6  - tighten bolts 11-14 to 6.3-8.3 Nm.

29. Install the camshafts.

30. Install all removed parts in the reverse order of removal.

The article is missing:

• Tool photo
• Photos of parts and consumables
• High-quality photos of repair

Source: Operation manual, maintenance and repair Nissan Primera P12. Publishing house "Third Rome".