The sequence of tightening the cylinder head bolts on a four-cylinder engine 1.8-I, AGN / AGU
- stage 1 - 40 Nm;
- stage 2 - 60 Nm;
- stage 3 - tighten by an angle of 90°;
- stage 4 - tighten by 90°
Tightening sequence of the cylinder head bolts on the four-cylinder engine 1.6-I, AEH / AKL
- stage 1 - 40 Nm;
- stage 2 - tighten by an angle of 90°;
- stage 3 - tighten by 90°
Order of execution
1. For the correct installation of the cylinder head and the cylinder head gasket, screw the VW-3070 guide pins into the extreme hole of the cylinder block intended for the cylinder head mounting bolts.
2. If there are no guide pins, you can make them yourself, for which you need to use two old cylinder head bolts. Cut off the head bolts and cut a slot for a screwdriver instead. After installing the cylinder head, use a screwdriver to unscrew the guide pins.
Warning: When installing the cylinder head, a new gasket must be used. Remove the gasket from its sealed package just before installing it on the cylinder block.
3. Check that the new cylinder head gasket is the same type as the original and that the TOP or OBEN·markings are facing up. Position the new cylinder head gasket on the surface of the cylinder block on the guide pins. Check that the holes are correctly aligned with the channels of the cooling and lubrication system.
4. Being careful, establish a head on the block of cylinders.
5. Insert and hand tighten the 8 cylinder head bolts with washers.
6. Unscrew the two guide pins with a screwdriver and screw in the two cylinder head bolts in their place.
7. Gradually, in the sequence shown in Fig. The sequence of tightening the cylinder head bolts on a four-cylinder engine 1.8-I, AGN / AGU or fig. The sequence of tightening the cylinder head bolts on the four-cylinder engine 1.6-I, AEH / AKL, tighten the cylinder head bolts in several stages.
Warning: Do not tighten the cylinder head bolts when the engine is warm. When installing a new cylinder head with a camshaft, after installing the cylinder head, lubricate the mating surfaces of the hydraulic tappets and camshaft cams with a thin layer of grease.
8. Rotate the crankshaft and camshaft to match the position of the No. 1 cylinder piston at TDC on the compression stroke.
9. Before installing the cylinder head cover inner gasket, lubricate the gasket mating surfaces with a light coat of D2 Sealant (places of application of sealant are indicated by arrows). Install the cylinder head cover gasket.
10. Install the cylinder head cover and gradually and sequentially tighten the cover nuts to 10 Nm.
11. Install the toothed belt on the camshaft pulley and adjust its tension.
12. Screw on the exhaust pipe with the catalytic converter.
Engine 1.8-I-Turbo
13. Screw the heat shield and turbocharger air pipe to the rear side of the cylinder head.
14. Install the intake manifold with a new gasket on the cylinder head and secure it with bolts, tightening them to a torque of 10 Nm.
15. Screw the lower part of the intake manifold to the holders by tightening the mounting bolts to a torque of 25 Nm.
16. Connect the fuel supply and return lines to the fuel line.
17. Connect all electrical connectors to the cylinder head in accordance with the markings previously made.
Engine 1.8-I
18. Install the V-belt tensioner and secure it with the bolt, tightening it to 25 Nm.
19. Install the V-belt.
20. Install the toothed belt guards.
21. Screw in the spark plugs.
22. Check that all hoses, pipes and electrical connectors are connected as previously marked.
23. Check the engine oil level and top up if necessary. If the old cylinder head gasket was defective, change the engine oil.
24. Pour fresh coolant into the cooling system.
25. Install the air filter.
26. Connect ground wire to battery.
27. Start the engine and warm it up to operating temperature. Stop the engine and check the engine oil and coolant levels and all connections for leaks.
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