Removal and installation of a cover of a head of the block of cylinders. Nissan Almera (from 1995 to 1999 of release)
Nissan Almera service from 1995 to 2000 in N15 body
1. General information
2. The general requirements to car repairs
3. Operation and car maintenance
4. Petrol engines
4.1. Removal and installation of the power unit
4.2. Dismantling and engine assembly
4.3. Block of cylinders
4.4. Shatunno-porshnevaya group
4.5. Cranked shaft and flywheel
4.6. Gazoraspredeleniye mechanism
4.7. Head of the block of cylinders of GA14DE and GA16DE engines
4.8. Head of the block of cylinders of the SR20DE engine
4.8.1. Removal and installation of a cover of a head of the block of cylinders
4.8.2. Removal and installation of a forward cover of a drive of the mechanism of a gazoraspredeleniye
4.8.3. Removal and installation of a chain of a drive of camshafts
4.8.4. Removal of a head of the block of cylinders
4.8.5. Check of a technical condition and installation of a head of the block of cylinders
4.8.6. Removal, check of a technical condition and installation of camshafts
4.9. Cooling system
4.10. Greasing system
4.11. System of production of the fulfilled gases
4.12. Power supply system
4.13. Complex control system of the engine (KSUD)
5. Diesel engines
6. Transmission
7. Running gear
8. Steering
9. Brake system
10. Electric equipment
11. Body
12. Appendices
13. Electric equipment schemes
 









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


Fig. 2.36. A detachment of wires of a high voltage from spark plugs




Fig. 2.37. Release of wires from fastening brackets


Fig. 2.38. Hose detachment сапуна on the right side




Fig. 2.39. Hose detachment сапуна on the left side


Fig. 2.40. Order of an inhaling of nuts of fastening of a cover of a head of the block of cylinders


Disconnect a wire from the "minus" plug of the storage battery. Disconnect wires of a high voltage from candles and release them from the brackets of fastening located on a cover of a head of the block of cylinders (fig. 2.36, 2.37). Remove collars of fastening and disconnect hoses сапуна case ventilation on the back party of a cover (fig. 2.38, 2.39). Weaken collars of fastening and disconnect an oil separator hose from the union located on a cover, and a hose from the union in the oil separator basis. Turn out bolts of fastening and remove an oil separator from a forward part of a head of the block of cylinders. Turn out in sequence, return specified fig. 2.40, and remove nuts of fastening of a cover of a head of the block of cylinders together with washers. Uncover.
Take laying of a cover and take out sealing rings from nests for spark plugs and the central hairpin on a cover of a head of the block of cylinders.

Fig. 2.41. Hermetic drawing on semicircular dredging of a head of the block of cylinders at installation of a cover of a head of the block of cylinders


Before installation carefully clear surfaces of interface of a head of the block of cylinders and a cover, remove oil traces. Put a hermetic layer on a surface of three semicircular dredging of a head of the block of cylinders (fig. 2.41). Establish rubber laying in a fillet of a cover of a head of the block of cylinders, be convinced that it is correctly laid on all length. Establish four sealing rings in openings for wires of a high voltage and a ring in an opening of the central hairpin. If necessary sealing rings can be fixed in the necessary situation with the help of hermetic.
Put a hermetic layer in width about 1 cm on laying of a cover of a head of the block of cylinders along the edges of openings of a cover of the bearing on the left side of a camshaft of final valves. Carefully establish a cover of a head of the block of cylinders on the engine, watching to shifting laying and sealing rings. Be convinced of the correct provision of a cover of a head of the block of cylinders, establish on hairpins rubber rings, washers and nuts.
After installation of a cover of a head of the block of cylinders slightly tighten the central nut 1 (see fig. 2.40) and four angular nuts in the following sequence: 10, 11, 13 and 8. Then tighten all other nuts of fastening the set moment. Execute further operations as it should be, the return to removal.

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4.8. Head of the block of cylinders of the SR20DE engine
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4.8.2. Removal and installation of a forward cover of a drive of the mechanism of a gazoraspredeleniye