DOHC cylinder head bolt tightening sequence
M11 bolts - tightening sequence: 1–10.
M8 bolts - tightening sequence: 11–13.
Location of camshaft bearing caps
1. Thoroughly clean the mating surfaces of the cylinder head and cylinder block.
2. Install a new gasket on the cylinder block.
3. Turn the crankshaft so that the pistons are in the middle of their stroke.
4. Install the cylinder head to the cylinder block.
5. Lightly coat the threads of the cylinder head bolts with engine oil (the arrows show the M8 bolts for fastening the front of the cylinder head), install them in place and tighten to the required torque in a certain sequence (see subsection 3.2.1).
6. Lightly coat the camshaft bearings in the head with engine oil and install the camshafts.
7. Lubricate the camshaft bearing caps with a thin layer of engine oil and install them in place in accordance with the markings. The intake camshaft bearing caps are marked R1-R5, and the exhaust camshaft bearing caps are marked L1-L5. The numbering of the covers on the drive side of the gas distribution mechanism.
8. Install the oil supply line to the camshaft lobes.
9. Gradually and sequentially tighten the nuts securing the camshaft caps in sequence. Tighten the fastening nuts by hand by turning them sequentially by 180°until the cover comes into contact with the cylinder head. Tightening sequence: L1 and R1, L5 and R5, L3 and R3. Then hand-tighten the rest of the cap nuts.
10. Tighten the cap nuts to the required torque by turning them through the same angle in the following sequence: L1 and R1, L5 and R5, L3 and R3, L2 and L4, R2 and R4.
11. Install timing chain and sprockets (see subsection 3.2.2.1).
12. Install the cylinder head cover with a new gasket and tighten the cover bolts sequentially from the edge to the center.
13. Screw in the spark plugs.
14. Install the ignition distributor, distributor rotor and cover.
15. Reinstall the high voltage wires.
16. Screw the exhaust pipe with a new gasket to the exhaust manifold.
17. Connect the wires to the radiator fan.
18. On vehicles with a fuel injection system, connect the wiring harness to the engine and the fuel lines to the pressure regulator.
19. Connect vacuum hoses and accelerator cable.
20. Connect the crankcase ventilation hose to the cylinder head.
21. Connect the coolant supply hose to the fitting on the cylinder head.
22. Connect the radiator and expansion tank hose.
23. Install the air filter.
24. Pour engine oil into the engine.
25. Pour coolant into the cooling system.
26. Connect ground wire to battery.
27. Start the engine and adjust if necessary.
Visitor comments