Skoda Workshop Service and Repair Manuals

Completely removing and installing the intake manifold   Note t  Observe safety measures and rules for cleanliness when working on vehicles with liquefied petroleum gas system (LPG) → Chapter. t  Observe safety measures and rules of cleanliness when working on the fuel supply (petrol) → Chapter. Removing –  Switch off ignition and withdraw ignition key.

–  If present, remove engine cover -arrows-. For vehicles with engine identification characters CHGA –  Empty gas line → Chapter.   WARNING When loosening the gas line, gas may escape. Wear safety goggles and safety clothing, in order to avoid eye injuries and scalding. Cover the connection point with a cloth and separate carefully. –  Remove gas distribution line → Chapter. –  Remove the bracket for the gas distribution line. Continued for all vehicles –  Remove intake air hose between throttle valve control unit -J338- and air filter.

–  Detach the vacuum line to the brake servo unit -arrow- from the intake manifold.

–  Unplug connector -1- from secondary air pump motor -V101-. –  Detach pressure hose -2- and intake hose -3- from secondary air pump motor -V101-. –  Remove oil dipstick from bracket for secondary air pump -V101-.

–  Remove bracket with secondary air pump motor -V101- from intake manifold -arrows-.

–  Unscrew screws for petrol fuel distributor and expose wiring loom -arrows-.   Note The fuel line can remain attached to the fuel distributor.

–  Unplug connector -arrows- from intake manifold. –  Detach activated charcoal filter solenoid valve 1 -N80- and coolant hose from intake manifold.

–  Disconnect plug -1- and remove throttle valve control unit -J338--arrows-.

–  Release on left and right each one screw -arrow- of the rear intake manifold suspension.

–  Unscrew screws -arrows- for bottom part of intake manifold.

–  Slacken the petrol fuel distributor and evenly detach it together with the injection valves -arrows- from the bottom part of the intake manifold. –  Carefully remove the intake manifold from the cylinder head and place the petrol fuel distributor together with the injection valves on a clean cloth in the engine compartment.   Note Close air intake channels in the cylinder head with a clean cloth. Install Installation is carried out in the reverse order. Pay attention to the following: –  Replace gasket rings between intake manifold and cylinder head. –  Replace gasket rings between injection valves and intake manifold and moisten lightly with clean engine oil. –  Fit on the petrol fuel distributor with the injection valves and press down evenly on the intake manifold. –  Pay attention to the correct position of the gasket rings between the bottom part and the top part of the intake manifold.   Note Secure all hose connections with corresponding hose clips. Tightening torques

Component		Nm
Intake manifold to cylinder head		25
Intake manifold to support		8
Bracket for secondary air pump to intake manifold		8
Throttle valve support to intake manifold		8
Gas distributor to intake manifold		3

For vehicles with engine identification characters manufactured up to 12.2010 (exhaust emission standard EU-4) –  Interrogate and erase the fault memory of the liquefied petroleum gas control unit (LPG) → Chapter. For vehicles with engine identification characters CHGA manufactured up to 01.2011 (exhaust emission standard EU-5) –  Interrogating and erasing fault memory of engine control unit → Vehicle diagnostic tester. For vehicles with engine identification characters CHGA –  Perform the gas system inspection (GSI) after filling up the gas line → BookletOctavia II.   Caution Check the liquefied petroleum gas system for tightness, for example using the gas leakage detector for natural gas vehicles -VAS 6227-.