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6.1.6. Removal and installation of a cover of a head of the block of cylinders

4-cylinder line engine


SEQUENCE OF WORKS
Removal
1. Remove a cross branch pipe of the air filter, having weakened fastening of collars.

Fig. 5.17. Removal of a cover of a head of the block of cylinders: 1, 3 – a bolt; 2 – plug; 4 – spark plug tip; 5 – hose; 6 – side cover; 7 – laying; 8, 9 – a cover


2. Disconnect a hose of 5 (fig. 5.17) of system of ventilation of a case of the engine from a cover of a head of cylinders.
3. Disconnect a clip of a cover 6 and the movement remove it up.
4. Turn off a bolt 1 then uncover 9 with the plug 2.
5. Remove tips from spark plugs.
6. Disconnect a wire of the sensor of concentration of oxygen.
7. Turn off bolts of fastening of a cover of a head of cylinders.

       PREVENTION
Bolts have various length therefore mark places of their installation.

8. Uncover 8 with laying 7.
Installation
9. Check technical condition of laying of a cover: it should not have porosity and the crushed places. Establish on a block head a cover 8 with laying 7.

       PREVENTION
Pay attention to correctness of installation of laying from back grooves.

10. Evenly fix bolts of fastening of a cover by the moment of 10 N · m.
11. Fix a wire of the sensor of concentration of oxygen.
12. Establish tips of spark plugs.
13. Establish and fix by bolts other covers.
14. Connect a hose of system of ventilation of a case and fix it by a collar.
15. Establish a cross branch pipe of the air filter.
16. Launch the engine and warm up it up to the working temperature.
17. Check tightness of a cover of a head of cylinders. Pay special attention to back dredging and niches for spark plugs.

   6-cylinder V-shaped engine
SEQUENCE OF WORKS
Removal
1. Disconnect the contact socket from the air measuring instrument sensor.
2. Remove the resonator of the air filter.
3. Remove the air filter.

Fig. 5.18. Removal of covers of heads of cylinders of the 6-cylinder V-shaped engine: 1 – inlet pipe; 2 – contact socket; 3, 5 – the ignition coil; 4 – spark plug tip


4. Turn off an inlet pipe 1 (fig. 5.18) from a cover, disconnect it from throttle knot and remove together with the sensor of a mass consumption of air.
For models with AKP:
5. Disconnect a tube of the index of level of oil in the transmission.
For all models:
6. Disconnect fastening of coils 3, 5 of ignition to covers of heads of cylinders.
7. Remove tips of 4 spark plugs.
8. Disconnect the vacuum hoses turned to an inlet collector from covers of heads of cylinders.
9. Disconnect a hose of system of ventilation of a case of the engine from a back end face of the left cover of a head of cylinders.
10. Turn off bolts of fastening of covers of heads of cylinders and remove them with sealing laying.
Installation
11. Establish a cover of a head of cylinders with laying and wrap fastening bolts a cross on a cross the moment of 10 N · m. Check correctness of installation of laying to the touch fingers.
12. Connect behind to a cover of the left head of cylinders a hose of system of ventilation of a case of the engine.
13. Connect vacuum hoses to covers of heads of cylinders.
14. Tighten ignition coils 3 and 5 the moment of 8 N · m.
15. Fix tips of 4 spark plugs to covers of heads of cylinders according to their marking and connect to ignition coils.
For models with AKP:
16. Tighten the directing tube of the index of level of oil in the transmission.
For all models:
17. Install the air filter.
18. Fix on a cover of a head of cylinders the air filter with an inlet pipe, the sensor of a mass consumption of air and throttle knot.
19. Connect the contact socket to the sensor of a mass consumption of air and install the resonator.