Camshaft Adjustment Valves N205/N318

Camshaft Adjustment Valves N205/N318

Special tools, testers and auxiliary items required

• Socket Wrench (T10072)

• TORX Bit Set (V.A.G 1766)

• Torque Wrench (V.A.G 1783)

• Ratchet Insert 1/4" (VAS 6234)

• Silicone Adhesive Sealant (D 176 501 A1)

• Sealant (D 454 300 A2)

Removing






- Release the tabs on the side and remove the cover - 1 - from the air intake duct.

- Unclip the air intake duct - 2 -.

- Remove the bolt - A -, disconnect the connector - B -, loosen the spring clamp - C - and remove the air filter housing and connecting pipe. Pay attention to the mark - D - when installing.






• Before disconnecting the connectors, mark the components.

- Disconnect the following connectors.






1 - Camshaft Position (CMP) sensor

2 - Camshaft adjustment valve 1

3 - CMP sensor 2

4 - Exhaust camshaft adjustment valve 1

- Free up the electrical wiring harness.

- Remove the coolant pipes from the cover.

- Remove the vacuum pump. Refer to => [ Vacuum Pump ] Vacuum Pump.

- Remove the 3 bolts - arrows - from the cylinder head cover.






- Remove the upper and lower coolant pipes from the cover.

- Remove the cover bolts - arrows - from the cylinder head.






• Carefully cover the lower chain guard to keep other parts from falling inside.

• Do not completely remove the camshaft adjustment valve bolts so that valve is not tilted when removed.

- Remove the bolts from the camshaft adjustment valves using the socket wrench (T10072) approximately 3 mm (5 turns) - arrows -.






- Pull the camshaft adjustment valve out, against the loosened bolts, from the control housing seal.

- Remove the bolts and pull the camshaft adjustment valve out of the control housing.

Installing

• The valve seat in the control housing must not be scored or scratched.

• The camshaft adjustment valves and control housing must be free of dust and contamination.

• The camshaft adjustment valves must not be subjected to knocks or impacts.

• Remove the new camshaft adjustment valves from their packaging just before installing them.

• Camshaft adjustment valves must not be pulled into valve seat by the bolts. Only press them in by hand.

- Coat the seal with clean engine oil.

- Install the camshaft adjustment valve carefully into the housing and push it all the way in by hand perpendicular to the valve axis.

- Tighten the bolts - arrows - to 3.8 Nm.






- 1 - camshaft adjustment valve 1.

- 2 - exhaust camshaft adjustment valve 1.

- Clean the sealing surface on the cover and cylinder head.

- Check the seals on the camshaft adjuster valves and replace them if necessary. Refer to => [ Cover Seal ] Cover Seal.

- Make sure the seal - arrows - fits correctly inside the cylinder head cover.






- Remove any remaining sealant - A -.

- Apply a thin bead of silicone adhesive sealant (D 176 501 A1) on the clean sealing surface of the cover.

- Apply a little sealant (D 454 300 A2) where it is marked on the cover as well.






• The sealant (D 176 501 A1) hardens quickly.

- Push the cover - slightly tilted - onto the camshaft adjustment valves. Make sure the cylinder head cover seal is not pressed back.






1 - Push the cover upward, under the cylinder head cover gasket.

2 - Push the cover against the cylinder head and onto the alignment pins.

- Make sure the seal - arrows - fits correctly. It must not be pushed back.






- Install all the bolts - arrows - and tighten them just a little.






- Then, tighten all the bolts to specifications, see - item 18 - in the => [ Cylinder Head and Cover Overview ] Cylinder Head and Cover Overview.

- Tighten the 3 cylinder head cover bolts - arrows - to specification, see - item 5 - in the => [ Cylinder Head and Cover Overview ] Cylinder Head and Cover Overview.






- Install the vacuum pump. Refer to => [ Vacuum Pump ] Vacuum Pump.

Further installation is in the reverse order of removal.