Solenoid valves, cylinders 1-4

Necessary preliminary tasks:

Read out fault memory in DME control unit
Switch off ignition
Remove right intercooler . See 17 51 001 REMOVING AND INSTALLING/REPLACING LEFT INTERCOOLER (N63) or 17 51 001 REMOVING AND INSTALLING/REPLACING RIGHT INTERCOOLER (N63) .
Release holder for electropneumatic pressure converter (EPPC) and carefully press to one side

NOTE: Solenoid valve (4) controls the inlet adjustment unit.

Solenoid valve (2) controls the exhaust adjustment unit.

Unlock plug connections of solenoid valves (2 and 4) and disconnect.

Fig 1: Identifying Solenoid Valves And Screws

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Installation:

Plug connections must snap audibly into place!

Unfasten screws (1 and 3).

Tightening torque 11 36 3AZ, see 11 36 VARIABLE CAMSHAFT CONTROL

Pull out solenoid valves (2 and 4).

Installation:

Replace O-rings (1 and 2) on solenoid valve .

Installation:

To install solenoid valves, coat both O-rings with engine oil.

If the solenoid valve is to be reused, the filter strainer (see arrow) must be cleaned.

Fig 2: Identifying O-Rings

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NOTE: If a filter element is clogged with dirt, the filter element (filter strainer) may be removed.
Release filter elements (1) at contact edges.

Fig 3: Identifying Filter Elements

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Bend open welding spots on filter element (1) with a screwdriver (2) in direction of arrow until welding spots are opened.

Fig 4: Bending Open Welding Spots On Filter Element

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Avoid damaging, e.g. notches or scratches, the solenoid valve housing (see arrows).

Fig 5: Identifying Solenoid Valve Damage Area

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Carefully insert solenoid valves (2 and 4) up to stop.

Ensure correct installation position.

Insert screws (1 and 3) and tighten down.

Tightening torque 11 36 3AZ, see 11 36 VARIABLE CAMSHAFT CONTROL

Fig 6: Identifying Solenoid Valves And Screws

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Assemble engine.

Now clear the fault memory.

Check function of DME control unit.