Check of technical condition and installation of a head of the block of cylinders. Nissan Almera (from 1995 to 1999 release)
Service of Nissan Almera from 1995 to 2000 in N15 body
1. General information
2. General requirements to car repairs
3. Operation and maintenance of the car
4. Petrol engines
4.1. Removal and installation of the power unit
4.2. Dismantling and assembly of the engine
4.3. Block of cylinders
4.4. Conrod and piston group
4.5. Bent shaft and flywheel
4.6. Gas distribution 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 the drive of the mechanism of gas distribution
4.8.3. Removal and installation of a chain of the drive of camshafts
4.8.4. Removal of a head of the block of cylinders
4.8.5. Check of technical condition and installation of a head of the block of cylinders
4.8.6. Removal, check of technical condition and installation of camshafts
4.9. Cooling system
4.10. Lubrication system
4.11. System of production of the fulfilled gases
4.12. Power supply system
4.13. Complex Control System of the Engine (CCSE)
5. Diesel engines
6. Transmission
7. Running gear
8. Steering
9. Brake system
10. Electric equipment
11. Body
12. Appendices
13. Schemes of electric equipment
 









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

The manufacturer recommends to take measurement of bolts of fastening of a head of the block of cylinders to define need of their replacement. It is necessary to measure length of each bolt (without a washer) from the head basis until the end of a core. If all bolts are shorter than 158,2 mm, they can be reused. If there are bolts which length exceeds 158,2 mm, then it is necessary to replace all bolts of fastening of a head of the block of cylinders in a set. The surfaces of interface of a head of the block of cylinders to the block of cylinders have to be carefully cleared before installation of a head. Remove the remains of old laying and a deposit by means of a wooden or plastic scraper. Clear the bottoms of pistons, taking necessary precautionary measures that the deposit did not get to canals of lubricant and circulation of cooling liquid.
Check the surfaces of interface of the block of cylinders to a block head: on them there should not be забоин, deep scratches and other damages. If damages insignificant, then them it is possible to eliminate by means of a file. If damages considerable, a proshlifuyta the interfaced surfaces on the machine. It is also necessary to check planeness of surfaces of interface to the help of a ruler.
Before installation wipe with pure rags of a surface of interface of a head of the block of cylinders to the block. Make sure that two adjusting pins are installed on tags in the block of cylinders. Install new laying on the block of cylinders. Install together with the assistant a head of the block of cylinders assembled on the block of cylinders on adjusting pins. Apply a thin film of pure engine oil on a carving part of bolts and under heads of bolts of fastening of a head of the block of cylinders. Put on bolts of a washer and establish bolts in the corresponding openings. Wrap bolts by hand.

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


Tighten bolts in the sequence specified fig. 2.56, the moments of an inhaling of threaded connections set in the appendix.
It is recommended to use a goniometer when performing an inhaling of bolts. Having finished an inhaling of the main bolts of fastening of a head of the block of cylinders, to tighten bolts with a diameter of 6 mm on a forward part of a head of the block of cylinders. Be convinced of the correct laying of electrical wires, connect sockets of the distributor, the coil of ignition and the block of ignition. Fix plaits of wires by collars and brackets. Connect wires of "weight" to a head of the block of cylinders and a collector and tighten fastening bolts.
On engines with the distributed release fuel injection till 1993 install a bolt of fastening of a branch pipe of the cooling system on the block of cylinders and tighten it. Establish a starter. Connect cooling system branch pipes to unions and fix them by means of collars. Attach and lay all wires and hoses on the place.
Check the wires suitable to an inlet collector and units of a power supply system of the engine fuel. Establish arms of fastening of an inlet collector.
Connect and fix a cable of management of fuel supply. Connect a reception pipe of the muffler to a final collector. Install the air filter and an air branch pipe. On cars with the automatic transmission connect and lay a cable of compulsory inclusion of a low gear. Install into place camshafts.

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4.8.6. Removal, check of technical condition and installation of camshafts