Camshaft Adjuster Valves

Camshaft Adjuster Valves

Special tools, testers and auxiliary items required

• Socket Wrench (T10072)

• TORX Bit Set (V.A.G 1766)

• Torque Wrench (5-60 Mm) (V.A.G 1783)

• Ratchet Insert 1/4" (VAS 6234)

• Sealant (D 176 501 A1)

• Sealing compound (D 454 300 A2)

Requirements

• Engine must be removed.

Removing

• Mark the connector assignment to the component before disconnecting the connectors.

- Disconnect the following connectors:

• Camshaft adjustment valve 1 (N205)

• Camshaft adjustment valve 1 (exhaust) (N318)

• Camshaft Position (CMP) sensor (G40)

• CMP sensor 2 (G163)

- Free up the wiring harness.

- Remove the vacuum pump, if present. Refer to => [ Mechanical Vacuum Pump ] Mechanical Vacuum Pump.

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





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

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





• The bolts - A - are not on vehicles with a mechanical vacuum pump.

CAUTION!
• Carefully cover the lower chain compartment so no parts can fall in.

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

- Loosen the camshaft adjustment valve bolts - arrows - approximately 3 mm (5 turns) using the (T10072).





- Pull the camshaft adjustment valve out of the seal seat in the control housing against the loosened bolts.

- Completely remove the bolts and remove the camshaft adjustment valve from the control housing.

Installing

CAUTION!
• 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.

• Only remove the new camshaft adjustment valve from its packaging right before installation.

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

- Lubricate the seal with clean engine oil.

- Carefully install the camshaft adjustment valve into the housing and press it in by hand perpendicular to the valve axis until its seated.

- Install and tighten the bolts - arrows - to 3.8 Nm.





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

- If replacing the seals in the cover, refer to => [ Camshaft Timing Chain Cover Seals, Installing ] Service and Repair.

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





- If necessary, remove the sealant residue in places - A -.

- Apply a thin bead of sealant (D 176 501 A1) to the sealing surfaces on the cover.

- Also apply some sealing compound (D 454 300 A2) to the areas - arrows - on the cover.





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

- - 1. - slide the cover at a slight angle onto the camshaft adjustment valves. Ensure the cylinder head cover seal is not rolled back.

- - 2. - Press the cover upward and under the cylinder head cover gasket. Press the cover against the cylinder head and onto the alignment pins.





- Make sure the cylinder head cover seal - arrows - is seated correctly. It must not be rolled back.





- Install all cover bolts - arrows - and tighten them lightly.





• The bolts - A - are not on vehicles with a mechanical vacuum pump.

- Tighten all bolts to specifications, refer to => [ Cylinder Head Overview ] Cylinder Head Overview.

- Tighten the three cylinder head cover bolts - arrows - to specifications, refer to => [ Cylinder Head Overview ] Cylinder Head Overview.





- Install the vacuum pump, if present. Refer to => [ Mechanical Vacuum Pump ] Mechanical Vacuum Pump.

The rest of the installation is basically a reverse of the removal sequence.