Cylinder head, camshaft and valves
- 1 - inlet valve;
- 2 - exhaust valve;
- 3 - block head;
- 4 - guide sleeve;
- 5 - oil scraper cap;
- 6 - washer supporting valve springs;
- 7 - external valve spring;
- 8 - internal valve spring;
- 9 - plate of valve springs;
- 10 - cracker;
- 11 - camshaft gear;
- 12 - gear wheel fastening bolt;
- 13 - stuffing box;
- 14 - key;
- 15 - bearing cover;
- 16 - washer;
- 17 - nut for fastening the bearing cover;
- 18 - camshaft;
- 19 - valve lifter
The order of tightening the cylinder head bolts
Engine removed from vehicle
1. Loosen the nuts and remove the top cover 2 of the camshaft drive (see fig. Five-cylinder engine).
2. Unscrew the twelve fastening nuts and remove the cover 11 of the head of the block, while not removing the gasket.
3. Install the piston of the 1st cylinder in the TDC. compression stroke (both valves are closed). The mark on the crankshaft pulley must align with the protrusion on the oil pump housing, as shown in the figure (or with a label on the cover 3 - see fig. Five-cylinder engine).
4. The mark on the camshaft sprocket must be aligned with the upper plane of the head cover gasket. The ignition distributor slider must be directed towards the contact of the 1st cylinder.
5. Loosen the water pump mounting bolts 22 (see fig. Five-cylinder engine), rotate the pump towards the cylinder block to loosen belt 1.
6. Remove the belt 1 from the gear wheel 5 of the camshaft
7. Loosen the gear wheel fastening bolt 5 and remove the wheel from the camshaft. Remove pin 7.
8. Unscrew and remove the stand fastening the cover 2 to the head 6 of the block.
9. Unscrew the bolt securing the rear cover 4 to the block head.
10. Loosen the cylinder head bolts, loosening them evenly in the reverse order shown in the figure The order of tightening the cylinder head bolts.
11. Press cover 4 to remove the camshaft from under it. Remove the cylinder head.
12. Remove the gasket 18 of the cylinder head (see fig. Five-cylinder engine)
13. Install the block head in reverse order. At the same time, replace the gasket 18 of the block head. Lay a new gasket on the cylinder block with the inscription "TOP" up without using sealant. Tighten the block head bolts in the sequence shown in the figure The order of tightening the cylinder head bolts, in three stages: 1st stage - 40 Nm (4.0 kgf·m); 2nd stage - 60 Nm (6.0 kgf·m); 3rd stage - tighten further by half a turn (180°). Tighten the bolt securing the gear wheel 5 to the camshaft to 80 Nm (8.0 kgf·m). Adjust the tension of the camshaft drive belt (cm. subsection 3.2.2.2).
If necessary, for example, to replace and grind valves, clean the combustion chambers from carbon deposits, etc., the block head can be removed without removing the engine from the car.
Engine on a car
1. Disconnect wire from «negative» battery terminals.
2. Drain the liquid from the engine cooling system (cm. pp. 1–3 subsections 4.1).
3. Remove the radiator grille and upper radiator shroud (cm. pp. 7 subsection 4.6, pp. 1–2 subsections 11.2).
4. Remove air filter (see pp. 1-6 subsection 6.1.2).
5. Remove alternator belt (see pp. 2–5 of subsection 12.1.3.1).
6. On vehicles equipped with air conditioning, without disconnecting the hoses, remove the compressor and secure with wire to the side of the body.
7. On vehicles with power steering, without disconnecting the hoses, remove the power steering pump and secure with wire to the side of the body.
8. Disconnect the upper radiator hose.
9. Mark all fuel and vacuum hoses and disconnect them from the head of the block.
10. Remove the ignition distributor cover with high voltage wires and wire holder.
11. On models with fuel injection, loosen the clamp and disconnect the air duct 12 (see fig. The main elements of the fuel injection system) from the throttle body. Disconnect the wires from the throttle position sensor.
12. Disconnect the accelerator cable and, if equipped, the cruise control mechanism.
13. Disconnect wire «masses» from the block head.
14. Disconnect the exhaust pipe from the muffler.
15. Further, the procedure for removing the head of the block is the same as on the engine removed from the car (cm. pp. 1–12 of subsection 3.2.2).
16. Install the block head in reverse order (cm. pp. 13 subsection 3.2.2).
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