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3.2.9. Installation of a head of the block of cylinders on the engine installed in the car

Prevention

You make removal of a head of the block of cylinders on the cold engine. At installation it is necessary to use new bolts of fastening and new laying of a head of the block of cylinders. At ustan ке cases of the camshaft it is necessary to use sealant. The specified moments of tightening can be applied only to later bolts. When using bolts of early types specify the tightening moments at the dealer of Opel.

Removal

The sequence of unscrewing of bolts of fastening of a head of the block of cylinders on engines 20 XEJ and C20 XE

The sequence of unscrewing of bolts of fastening of a head of the block of cylinders on the X20 XEV engine

PERFORMANCE ORDER
1. Remove a weight wire from the accumulator.
2. Merge cooling liquid from the cooling system.
3. Disconnect a reception exhaust pipe from a final collector.
4. The head of the block of cylinders can be removed from the engine together with collectors, or collectors can be disconnected from a head of the block of cylinders before its removal. In case on an inlet collector no works are performed, it can be unscrewed from a head of the block of cylinders and to record, at the same time it is not required to disconnect the corresponding hoses, pipes and electric sockets.
5. If the head of the block of cylinders is removed together with an inlet collector, disconnect from an inlet kollekto ра hoses, pipes and electric sockets. Unscrew an arm of fastening of an inlet collector. Weaken bolts of fastening of the generator, then unscrew the top fastening of the generator from an inlet collector.
6. Disconnect the electric socket from the measuring instrument of a stream of air and a ventilation hose from the heater block on the throttle case. Disconnect a branch pipe of the air filter and remove knot of the measuring instrument of a stream of the air / block of a heater from the throttle case.
7. Disconnect an accelerator cable from the lever of a butterfly valve, then unscrew an arm of fastening of a cover of a cable of an accelerator and remove it from an inlet collector.
8. Unscrew two nuts and disconnect from two sides of the fuel highway of the tire of grounding.
9. Disconnect the electric socket from the switch of provision of a butterfly valve.
10. Remove a casing of a plait of wires, then disconnect electric sockets from fuel nozzles, previously squeezing the fixing brackets. Move a plait of wires with a casing aside.
11. Disconnect two hoses of ventilation of a case from a back part of a cover of a head of the block of cylinders.
12. Unscrew an arm from a collector.
13. Check that all hoses, pipes and electric sockets are disconnected from an inlet collector, then unscrew nuts of fastening and remove an inlet collector from a head of the block of cylinders.
14. Remove laying inlet коллекто ра from a head of the block of cylinders.
15. Take off a gear belt, pulleys of the camshaft, mechanism of a tension and an intermediate pulley.
16. Unscrew top and average are firm for screws of fastening of an external casing of a gear belt. Pay attention that the top rack is unscrewed from a head of the block of cylinders, and the average rack is attached by a bolt.
17. Unscrew two top bolts of fastening of a back casing of a gear belt to a head of the block of cylinders.
18. Uncover the distributor of ignition and high-voltage wires.
19. Disconnect the electric socket from the ignition distributor.
20. Disconnect a hose of supply of cooling liquid from the left end face of a head of the block of cylinders.
21. Unscrew a bolt, the fixing arm of a pipe of ventilation of a case to an end face of a head of the block of cylinders.
22. Disconnect the top hose of a radiator from a thermostat casing. Then disconnect electric sockets from the sensor of the index of temperature and the sensor of temperature of cooling liquid which are located in a thermostat casing.
23. Check that all hoses, pipes and electric sockets are disconnected from a head of the block of cylinders.
24. On the X20 XEV model remove to a raspreda a litelny shaft.
25. Using a face key, in the sequence shown on rice. The sequence of unscrewing of bolts of fastening of a head of the block of cylinders on engines 20 XEJ and C20 XE, the Sequence of unscrewing of bolts of fastening of a head of the block of cylinders on the X20 XEV engine, unscrew bolts of fastening of a head of the block of cylinders first of all on a quarter of a turn, then on a half of a turn and, at last, unscrew them completely.
26. Remove a head of the block of cylinders.
27. Remove laying of a head of the block of cylinders. At installation it is necessary to use new laying.

Preparation of a head for installation

PERFORMANCE ORDER
1. The interfaced surfaces of a head and the block of cylinders have to be absolutely pure. For their cleaning use a firm plastic or wooden scraper. When cleaning be careful as it is very easy to damage aluminum alloy. Check that the deposit did not get to oil and water canals. It is especially important for the lubrication system as the deposit can block supply of oil to engine components. If necessary clear channels.
2. Check the interfaced surfaces of a head and the block of cylinders for existence of notches, deep scratches and other damages. If defects small, they can be removed with machining. But at major defects of a detail are subject to replacement.
3. Using a metal ruler and the probe, check planeness of the interfaced surfaces.
4. Clear openings under bolts in the block. Screwing up of a bolt in the opening filled with oil can break off the block because of hydraulic pressure.
5. Replace bolts of fastening of a head of the block of cylinders irrespective of their state.

Installation

The sequence of tightening of bolts of fastening of a head of the block of cylinders on engines 20 XEJ and C20 XE

The sequence of tightening of bolts of fastening of a head of the block of cylinders on the X20 XEV engine

Tightening of bolts of fastening of a head of the block of cylinders the required moment

PERFORMANCE ORDER
1. Check that new laying of a head of the block of cylinders has the same type, as the original and establish laying so that marking of OBEN or TORAHS was directed up and settled down from a gear belt.
2. Establish a head of the block of cylinders on the directing pins.
3. Temporarily establish pulleys of a bent shaft and camshafts and check that adjusting tags of pulleys coincide with indexes.
4. Establish new bolts of fastening of a head of the block of cylinders and tighten them at this stage by hand.
5. Gradually and consistently tighten all bolts of fastening of a head of the block of cylinders the required moment in several stages (see rice. The sequence of tightening of bolts of fastening of a head of the block of cylinders on engines 20 XEJ and C20 XE, the Sequence of tightening of bolts of fastening of a head of the block of cylinders on the X20 XEV engine, Tightening of bolts of fastening of a head of the block of cylinders the required moment).
6. Further installation is made in the sequence, the return to removal taking into account the next moments.
7. Install the mechanism of a tension of a gear belt, an intermediate pulley, pulleys of camshafts and a new gear belt. Adjust a tension of a gear belt.
8. Establish an inlet collector with new laying on a head of the block of cylinders.
9. Connect to a final collector a reception exhaust pipe with new laying.
10. Establish the top fastening генерато ра on an inlet collector, then establish a belt of the drive of the generator and adjust its tension.
11. Fill in cooling liquid in the cooling system.
12. Check that all hoses, pipes and electric sockets are correctly connected.
13. Start the engine and check it for existence of leaks.