Note: Attach cable ties to the appropriate locations. Seal the open channels of the intake manifold and exhaust tract with suitable plugs, for example from the plug set for the engine "VAS 6122".
Drain the coolant. Remove the camshafts.
Warning! Risk of damage to valves and piston crowns. Do not turn the crankshaft when the camshafts are removed.
Remove the exhaust pipe with the catalytic converter. Remove the lambda probe "G39". Unscrew the screw "arrow" on the left and right. Disconnect the lower part of the air duct "1" from the fasteners and remove.
Loosen clamp "2" and remove the air hose from the intercooler. Immediately close open pipes and nozzles with clean plugs, for example, from the plug set for the engine "VAS 6122". Pos. "1" can be ignored.
Loosen clamp "2". Release coolant hose "3". Unscrew screws "arrows". Disconnect connector "1" from boost pressure sensor "G31" and remove right air duct.
Loosen the clamps "arrows" and disconnect the cooling system hoses. Turn the cooling system hose "1" to the side.
Disconnect the following electrical connectors.
1. Oil pressure sensor "F22"
2. Low oil pressure sensor "F378"
5. Control valve of oil nozzles for piston cooling "N522"
Unscrew the "arrow" screws.
Unscrew screw -1, unscrew nut "3" and remove bracket "2" of the intake manifold.
Disconnect the following electrical connectors.
1. Throttle body "J338"
2. Intake air temperature sensor "G42" with intake manifold pressure sensor "G71"
3. Fuel pressure sensor "G247"
Remove connector "4" from the bracket. Release the wiring harness and push it aside. Release the wiring harnesses -1 and 2-, secured to the air duct. Loosen clamp "3". Unscrew the screws "arrows" and remove the air duct by moving it downwards.
Loosen the clamp "arrow" and remove the air hose "1" from the intercooler.
Release from the bracket and disconnect connector "3" of the knock sensor 1-G61-. Disconnect connectors -2 and 4-. Pos. "1" can be ignored.
Disconnect the connectors and release the wire harnesses.
1. Intake manifold flap valve - N316 -
2. Coolant shut-off valve "N82"
3. Coolant temperature sensor "G62"
4. 3rd stage oil pressure sensor "F447"
Unscrew the screw "arrow", unscrew the nut "1". Remove the heat shield "2".
Unscrew screw "1", only loosen screw "3". Disconnect bracket "2" of turbocharger.
Unscrew the "arrow" nuts. Remove the turbocharger from the cylinder head and bend it down.
Unscrew the "arrow" screws. Unscrew the cylinder head bolts with the "T10070" socket wrench in the sequence -1...10-.
Note: Make sure all pipes and cables are disconnected. When removing the cylinder head, pay attention to the tensioner and damper shoes.
Remove the cylinder head. Place the cylinder head on a soft pad (made of foam rubber or similar material).
Installation
Caution! Risk of damage to mating surfaces. Carefully remove any remaining sealant from the cylinder head and cylinder block. Avoid leaving grooves or scratches. Do not damage the cylinder block. There must be no oil or coolant in the blind holes for the cylinder head mounting bolts. Risk of a leaky cylinder head gasket. Remove the new cylinder head gasket from the packaging immediately before installation. Handle the gasket with care, being careful not to damage the silicone layer and the rolled edges of the gasket. Risk of damage to open valves. Plastic gaskets for protecting open valves may only be removed immediately before installing the cylinder head. Risk of damage to valves and piston crowns after working on the valve mechanism. Turn the engine at least 2 revolutions to ensure that the valve does not seat when starting. Replace the screws that are tightened to a certain angle. Replace the gaskets, lip seals and self-locking nuts. Observe the differences in the use of sealants for mating surfaces and cylinder head fastening screws. When installing a cylinder head from the exchange stock, it is necessary to lubricate the friction surfaces of the hydraulic compensators, roller levers and camshaft cams with engine oil before installing the camshafts. Hose fittings and pipes and booster air hoses must be cleaned of oil and degreased before installation. Secure all hose connections with appropriate serial clamps. In order to securely fasten the booster air hoses to their fittings, it is necessary to apply a rust converter to the augers of previously used screw clamps before installation. When replacing the cylinder head or its gasket, replace the coolant and engine oil.
Apply the cylinder head gasket. Check the presence of the "arrow" mounting pins in the cylinder block. Observe the cylinder head gasket installation position, designation (part number) should be read from the intake valve side.
Caution! Make sure that no parts are damaged by the timing chain when the crankshaft rotates.
If the crankshaft has been turned during this time: set the piston of the 1st cylinder to the "TDC" position and turn the crankshaft back a little. Install the cylinder head. Insert new cylinder head mounting bolts and tighten by hand.
Note: There is no need to tighten the cylinder head mounting bolts after repairs.
Using the "T10355" stop, turn the crankshaft poly V-belt pulley to the "TDC" position. The notch on the crankshaft poly V-belt pulley and the mark on the lower timing chain cover should be located opposite each other "arrow".
Installation in reverse order. Install camshafts. Change engine oil. Change coolant.
(Text obtained from the website: «SKODABOOK.ru»)