Ford Sierra

1982-1993 of release

Repair and operation of the car

3.1.4.4.8. Head of the block of cylinders of the engine

GENERAL INFORMATION

Knot of a head of the block of cylinders of the DOHC engine

1 – head of the block of cylinders,

2 – laying of a head of the block of cylinders,

3 – covers of bearings of cam-shafts,

4 – oil supply pipeline,

5 – cover of a head of the block of cylinders,

6 – laying of a cover of a head of the block of cylinders

Removal of a head of the block of cylinders

PERFORMANCE ORDER

1. To disconnect a weight wire from the accumulator.

2. To remove the air filter together with its pipelines.

3. To merge the cooling system by unscrewing of a bolt in the lower right part of a radiator.

4. To disconnect from a radiator the top elastic pipeline, the pipeline from a broad tank and the pipeline from the thermostat.

5. To disconnect the elastic pipeline of heating of interior of the car from a head of the block of cylinders.

6. To disconnect the pipeline of removal of air from a cover of a head of the block of cylinders.

7. To disconnect a cable of a pedal of an akseleratora. In the carburetor engine to unscrew a cable of a butterfly valve together with the holder, and in the engine with injection of fuel to disconnect draft from the case of a butterfly valve after extraction from a clip from artificial material.

8. In engines with injection of fuel to disconnect the vacuum pipeline from an inlet collector.

9. In engines with injection of fuel to disconnect the pipeline of supply of fuel to the regulator of pressure and to nozzles.

10. To disconnect a wire of high voltage from the ignition coil.

11. To unscrew a nut of the top fastening of a forward exhaust pipe to a final collector.

12. To lift the car.

13. To unscrew two other nuts of fastening of a forward exhaust pipe to a final collector.

14. To lower the car.

15. To unscrew wires of high voltage from spark plugs and to uncover the ignition distributor (Torx T25 key).

16. To unscrew spark plugs.

17. To take the ignition distributor.

18. To uncover a head of the block of cylinders (11 bolts and 4 nuts).

19. To remove the top casing cardan chains of system of gas distribution.

20. To unscrew two bolts of Torx of fastening of asterisks of cam-shafts.

21. To install the piston of the 1st cylinder in VMT.

22. Will designate a chertilka interposition of tooth of an asterisk and chain, vzaimodeytsvuyushchy with it.

23. To remove the top guide of a chain.

24. To remove a lock ring of an axis of the tension device and the tension device of a chain (see rice. Installation of gas distribution of the DOHC engine).

25. To take an axis of the tension device of a chain by means of a bolt of M6x70 and the plug 15 mm long.

26. To remove the tension device of a chain.

27. To remove asterisks from both cam-shafts.

28. To take a hydraulic pusher of the tension device.

29. To uncover bearings of cam-shafts, gradually alternately unscrewing covers of bearings and the pipeline of supply of oil.

Prevention

Covers of bearings are designated at the plant that in the course of assembly were established on appropriate places.

30. To take cam-shafts.

31. To take hydraulic pushers and to designate them so that at assembly they were established on the places.

32. To weaken half way bolts of fastening of a head of the block of cylinders in the sequence of the return to process of their tightening (see rice. Sequence of tightening of bolts of a head of the block of cylinders of the DOHC engine), and then to unscrew bolts of fastening of a head of the block of cylinders.

Prevention

Bolts cannot be used for fastening of a head of the block of cylinders again.

33. To remove a head of the block of cylinders together with inlet and final collectors. After removal from the block of cylinders of a head it is impossible to lay down it on the lower surface.

Sequence of tightening of bolts of a head of the block of cylinders of the DOHC engine

M11 bolts – the sequence of tightening: 1 – 10.

M8 bolts – the sequence of tightening: 11 – 13.

Installation of a head of the block of cylinders

PERFORMANCE ORDER

1. To clear laying prileganiye surfaces on a head of the block of cylinders and the block of cylinders of the engine.

2. To install new laying of a head on the block of cylinders.

3. For elimination of a possibility of damage of valves and pistons follows, rotating a bent shaft, to install the piston of the 1st cylinder in situation about 20 mm below VMT.

4. To install a head on the block of cylinders of the engine.

5. To screw in a hand bolts in openings in a head of the block of cylinders (see rice. Sequence of tightening of bolts of a head of the block of cylinders of the DOHC engine).

6. To tighten bolts in the sequence shown on rice. The sequence of tightening of bolts of a head of the block of cylinders of the DOHC engine, in five stages:
       – the 1st stage (M11 bolts – sequence 1 – 10): 25 Nanometers;
       – the 2nd stage (M11 bolts – sequence 1 – 10): 55 Nanometers;
       – the 3rd stage (M11 bolts – sequence 1 – 10): to tighten on 90 °;
       – the 4th stage (M11 bolts – sequence 1 – 10): to tighten on 90 °;
       – the 5th stage (M8 bolts – sequence 11 – 13): 24–27 Nanometers.

Prevention

Two long bolts of M8 are screwed in in the openings designated as (11) and (12), and a short bolt of M8 – in an opening (13).

7. To grease with a thin butter layer of a surface of hydraulic pushers and to establish them to appropriate places in nests of a head of the block of cylinders.

8. To grease the surfaces of sliding of bearings of a cam-shaft on a head of the block of cylinders and to establish on them cam-shafts so that shponochny grooves were sent to the forward party to the right.

9. To put on covers of bearings, paying attention to their designations:
– R1–R5 – covers of bearings of a shaft of inlet valves (R1 – from the drive of system of gas distribution);
– L1–L5 – covers of bearings of a shaft of final valves (L1 – from the drive of system of gas distribution).

10. To insert the pipeline of supply of oil to cams and the top guide cardan chains of system of gas distribution.

11. To tighten the corresponding moment bolts of fastening of covers of bearings of cam-shafts alternately, one after another corresponding to their numbers.

12. To sort a hydraulic pusher of the tension device and to merge from it oil.

13. By means of special adaptation 21.145 to collect the hydraulic pusher of the tension device filled with oil for the engine. For this purpose it is necessary to establish a pusher case by the flat party on a workbench, and on it adaptation plug a cone up. To install the pusher piston on the plug and to squeeze everything together adaptation lever which makes a characteristic sound after a dozhatiya against the stop (in the lowest situation).

14. To arrange in the chain directing a hydraulic pusher of the tension device.

15. To install the tension device of a chain and its lock ring.

16. To check whether there is a piston of the 1st cylinder in VMT (the flute of a shponochny groove of a bent shaft is directed down).

17. To put on two asterisks of cam-shafts together with a chain, observing the correct interposition according to the signs which are blurted out in the course of removal of asterisks.

18. To execute several turns a bent shaft in the direction of its working rotation, and then to check correctness of a relative positioning of shaft and a chain.

19. To establish the top guide together with a spring clip of fastening.

20. To establish the top casing cardan to a chain of system of gas distribution together with new laying.

21. To establish a cover of a head of the block of cylinders together with new laying.

22. To tighten bolts of fastening of a cover of a head of the block of cylinders the corresponding moment, beginning from extreme bolts and finishing on averages.

23. To screw up spark plugs.

24. To install the ignition distributor, a rotor and a cover of the distributor.

25. To connect to candles and the coil of ignition of a wire of high voltage.

26. To screw on a final collector a forward exhaust pipe together with new laying.

27. To connect wires to engines of fans of a radiator and a plait of wires to the electronic actuation device.

28. In the engine with injection of fuel to connect a fuel-supply line to the regulator of pressure and nozzles.

29. To connect vacuum the pipeline.

30. To connect an accelerator pedal cable.

31. To connect to a cover of a head of the block of cylinders of the pipeline of system of removal of air.

32. To connect the elastic pipeline of heating of interior of the car to a head of the block of cylinders.

33. To connect the top elastic pipeline to a radiator, the pipeline to a broad tank and the thermostat.

34. To install the air filter.

35. To add amount of oil in the lubrication system of the engine and to fill the cooling system with the corresponding liquid and to remove air from it.

36. To connect a weight wire to the accumulator.

37. To check adjusting parameters of the engine idling.

Repair of saddles of valves and valves

PERFORMANCE ORDER

1. If results of measurements show that after regrinding of a working facet of the valve will conform to requirements, then it is possible to repair them in specialized repair shop. In this case it is necessary to order regrinding of the corresponding saddles of valves also.

2. To check a condition of a working facet of valves.

3. To check a condition of a working facet of saddles of valves.

4. To check tightness of knot the valve saddle.

5. Very carefully to clear a head of the block of cylinders after regrinding of saddles and grinding in of valves of particles of abrasive material and metal sawdust.

Assembly

PERFORMANCE ORDER

1. To oil cores of valves.

2. To insert the valve into a guide in which it worked earlier, to stick flutes on the end of a core of the valve with an adhesive tape.

3. To install the lower basic plate of springs of valves.

4. To oil a working edge of an oil scraper cap of the valve and to insert it by means of the corresponding assembly plug.

5. To remove an adhesive tape.

6. To repeat the last four operations for other valves.

7. To install serially on each valve the corresponding springs, the top basic plates of springs and crackers by means of the device for compression of springs of valves.

8. To screw final and inlet collectors on a head of the block of cylinders.