Replacing the cylinder head gasket.
1 - timing chain, 2 - camshaft sprocket, 3 - camshaft oil seal, 4 - intake camshaft, 5 - front bearing cap, 6 - exhaust camshaft, 7 - cylinder head cover, 8 - head cover bolt cylinders, 9 - gasket, 10 - positive crankcase ventilation hose, 11 - camshaft position sensor mounting bracket, 12 - rear bearing cap, 13 - oil filler cap, 14 - left cylinder head, 15 - right cylinder head, 16 - gasket cylinder heads, 17 - cylinder block.
Withdrawal
Attention:
- To prevent damage to the painted surfaces of the body, cover the front fenders of the car with protective covers.
- Removing the cylinder head is done when the coolant temperature matches the ambient temperature (engine cold).
- Be careful when disconnecting hoses, do not spill oil or other liquid.
- Plug the disconnected pipes or hoses to prevent foreign particles from getting inside.
Note:
- Check the condition of the timing belt before removing the cylinder head.
- When disconnecting hoses, always mark them first so that the hoses are in their original position when connected.
1. Remove the battery and engine noise cover.
2. Drain the coolant and disconnect the upper radiator hose.
3. Disconnect the engine wiring harness.
4. Disconnect the air intake hose from the throttle body.
5. Disconnect the accelerator pedal cable and cruise control cable.
6. Disconnect the coolant hose from the throttle body.
7. Disconnect the valve hose of the forced crankcase ventilation system and the vacuum hose of the brake booster.
8. Disconnect the vacuum hoses.
9. Before disconnecting the high pressure fuel hose from the fuel manifold, bleed any residual pressure from the high pressure fuel lines to prevent fuel splashing.
10. Disconnect the high pressure fuel hose from the fuel manifold.
11. Remove the intake manifold reservoir support bracket.
12. Remove the intake manifold reservoir and gasket.
13. Disconnect the fuel injector harness connector.
14. Remove the fuel manifold along with the injectors and fuel pressure regulator.
Caution: Be careful not to drop the injectors when removing the fuel manifold.
15. Disconnect the coolant temperature sensor connector.
16. Check that all connectors and wiring clips are disconnected from the intake manifold.
17. Remove the intake manifold assembly and gasket.
18. Remove high voltage spark plug wires.
Attention: spark plug wires should be removed by holding them by the end of the wire, and not by the wire itself.
19. Remove ignition coils.
20. Disconnect all wiring connectors and wiring retainers from cylinder heads.
21. Using a 16 mm wrench, turn the auto accessory drive belt tensioner lever clockwise about 14 degrees, then remove the accessory drive belt.
22. Remove the power steering pump pulley and crankshaft pulley, tensioner pulley and drive belt guide roller for mounted units.
23. Remove the timing belt covers.
24. Loosen the automatic timing belt tensioner.
25. Remove the timing belt from the camshaft sprockets.
26. Remove protective casings of final collectors and final collectors in gathering.
27. If necessary, remove the coolant pump.
28. Remove the cylinder head covers.
29. Remove the camshaft sprockets.
30. Remove the camshaft bearing caps.
31. Remove the timing chain, intake and exhaust camshafts.
32. Remove the thermostat housing.
33. Remove the cylinder head by unscrewing its mounting bolts in two or three steps using a 12 mm tool head.
Installation
Parts are installed in the reverse order of removal. When installing parts, pay attention to the following operations:
1. Installing the cylinder head gasket and cylinder head.
- A) Clean the mating surfaces of the cylinder head and cylinder block from the remnants of the old gasket.
Note: Be careful not to let any gasket particles get into the engine.
- b) Check that the cylinder head gasket identification marks match the specifications.
- V) Install the cylinder head gasket on the cylinder block with the identification mark facing up (to the cylinder head).
Note: Do not apply sealant to the cylinder head gasket.
- G) Using a 12mm tool socket, tighten the cylinder head bolts using the angle tightening method in the sequence shown in the figure as follows:
- First tighten all bolts to 25 Nm.
- Tighten all mounting bolts at an angle of 58-62°.
- Finally tighten all mounting bolts to an angle of 43-47°.
2. Installation of manifold gaskets.
Caution: Replace the exhaust manifold gasket with a new one before reinstalling.
3. Installation of camshafts.
- A) Install hydraulic lifters (pushers) in place.
- b) Align the timing chain with the chain sprockets of the intake and exhaust camshafts as shown in the illustration.
- V) Lubricate the camshaft bearing journals with engine oil, then install the camshaft in place.
Note: If necessary, check the pressing force of the chain sprocket of the intake camshaft. The chain sprocket must separate with a force greater than 10,000 N at room temperature.
- G) Install the camshaft bearing caps. The identification marks on the bearing caps are used to identify the location of the cap installation (intake/exhaust valve side).
- I: intake camshaft,
- E: exhaust camshaft.
- d) Tighten the camshaft bearing cap bolts to a nominal torque in two or three steps and in sequence from the center to the periphery.
Torque:
- M10: 14-16 Nm
- M8: 10-12 Nm
4. With a special tool (mandrel for installing the camshaft oil seal) install the camshaft seal.
- A) Make sure that the lip and outer surface of the camshaft oil seal are lubricated with engine oil.
- b) Slide the oil seal onto the camshaft from the timing belt sprocket side, then install the oil seal until it stops with a hammer on the mandrel.
5. Installation of camshaft sprockets.
Install the camshaft sprockets and tighten their fastening bolts to the rated torque.
- Tightening torque: 90-110 Nm
6. Timing belt installation (see section "Timing Belt Replacement").
7. Installing the cylinder head cover
- A) Install the cylinder head cover and tighten its fastening bolts to the specified torque in the sequence of the numbers shown in the figure, as follows.
- First, pre-tighten all bolts to half the rated torque.
- Tightening torque: 5-6 Nm
- Tighten all bolts to rated torque.
8. After completing the installation of all parts, fill in the coolant and add engine oil if necessary. Start the engine and check for leaks.