Removal 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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4.8.4. Removal of a head of the block of cylinders

Before removal of a head of the block of cylinders write down and note the provision of all arms and laying of hoses, cables and wires to facilitate installation of the removed details.
Below removal of a head of the block of cylinders without dismantle of inlet and final collectors is considered. In case of need dismantle of inlet and final collectors execute this operation first of all.
Disconnect a wire from the negative plug of the storage battery. Merge liquid from cooling system. Remove camshafts. Remove the air filter. Dump pressure in a power supply system of the engine and disconnect топливопровод and hoses plum from the case of a butterfly valve or the fuel highway. Muffle all openings to avoid leakage of fuel and hit of pollution in a power supply system. Disconnect a cable of a drive of management of supply of fuel. Separate electrosockets of a butterfly valve, an inlet collector and auxiliary devices.
Disconnect electric wires from a collector. Provide access to a head of the block of cylinders. Disconnect hoses from the hydraulic booster, hoses of system of cooling and all other hoses from a collector and the corresponding valves. Remove arms of fastening of an inlet collector. Disconnect a reception pipe of the exhaust silencer from a final collector.
On cars with an automatic transmission disconnect a cable of compulsory inclusion of a low gear from the case of knot of a butterfly valve.

Fig. 2.55. A bolt in diameter of 6 mm from a drive of camshafts


Weaken a collar of fastening and remove branch pipes of system of cooling from a back part of the pump of cooling liquid. Disconnect radiator branch pipes from a forward part of a head of the block of cylinders; on models of engines with the distributed injection of fuel of release till 1993 remove a starter. Turn out and remove a bolt of fastening of branch pipes of system of cooling of a head of the block of cylinders to a back part of the block of cylinders.

Fig. 2.56. Order of an inhaling of bolts of a head of the block of cylinders


Disconnect electrosockets of the distributor, the coil of ignition and the ignition block. Release plaits of wires from fastening collars; take wires aside from a head of the block of cylinders. Disconnect wires of connection with "weight" from a head of the block of cylinders and an inlet collector. Turn out two bolts and remove an arm of fastening of the generator to a head of the block of cylinders. Turn out bolts in diameter of 6 mm from a chain of a drive of camshafts of a head of the block of cylinders and one bolt in a forward part of a head of the block of cylinders (fig. 2.55). Turn out in sequence, return shown on fig. 2.56, ten of the main bolts of fastening of a head of the block of cylinders. Be convinced that all bolts rotate a hand, take bolts of fastening of a head of the block of cylinders together with washers. Mark them for simplification of installation at assembly. Remove a head of the block of cylinders. Remove laying from a surface of the block of cylinders. If adjusting pins are easily taken out, remove them and store together with a head of the block of cylinders. Mark with paint the correct provision of adjusting pins in the block of cylinders.

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4.8.5. Check of a technical condition and installation of a head of the block of cylinders