Glow Plug: Service and Repair

Ceramic Sheathed Element Glow Plugs

Special tools, testers and auxiliary items required

• Flex wrench (3220)

• Torque wrench (5 to 50 Nm) (VAG 1331)

• Handheld multi meter (VAG 1526 A)

• Connector test set (VAG 1594 C)

• Pliers (6275)

Test Conditions

• Engine is cold

• Ignition is switched off

Procedure

• Observe visual characteristics of ceramic sheathed element glow plugs. Refer to --> [ Visual Characteristics of Ceramic Sheathed Element Glow Plugs ] Description and Operation.

• When removing and installing, do not cant ceramic sheathed element glow plugs. Remove components which hinder installation.

- Remove the intake manifolds. Refer to --> [ Intake Manifold ] Intake Manifold.

- Disconnect the connectors from the ceramic sheathed element glow plugs using the pliers (6275).

- Remove ceramic sheathed element glow plugs using flex wrench (3220).

Installation is performed in the reverse order of removal, noting the following:

- Cylinder head bore and thread must be completely cleaned of deposits before installing.

• Never oil or grease thread of bore in cylinder head and ceramic sheathed element glow plugs.

- Install ceramic sheathed element glow plugs into cylinder head by hand using flex wrench (3220).

- Then tighten ceramic sheathed element glow plugs. Tightening specification: 15 Nm

CAUTION!
After installing and before first engine start with a cold engine, always perform a resistance test at all ceramic sheathed element glow plugs.

• Specified value: max. 1.0 ohms

- If specified value is exceeded, replace malfunctioning ceramic sheathed element glow plug.

• If the malfunctioning ceramic sheathed element glow plug is broken, remove all broken pieces from engine, otherwise they can cause damage to engine.