64 51 591 Removing and installing/renewing evaporator

WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

REMOVE HEATING UNIT

Release screw (1).

Tightening torque 64 53 3AZ .

Remove adapter plate (2).

Release screws (4).

Tightening torque 64 11 1AZ .

Remove bulkhead adapter (3).

Fig 1: Identifying Bulkhead Adapter With Adapter Plate And Screws

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Release screw (1).

Replacement

Release screws (2) on expansion valve (3).

Tightening torque 64 53 9AZ .

Remove expansion valve (3).

Installation:

Replace sealing rings.

Use special tool 009310 Keil to mount sealing rings without damaging them.

Fig 2: Identifying Expansion Valve With Mounting Screws

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Release screws (1).

Unclip associated retaining lugs on lower housing section (2).

Remove lower housing section (2) and place to one side.

Fig 3: Identifying Lower Housing Section With Mounting Screws

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Pull evaporator (1) in direction of arrow out of upper housing section (2).

Fig 4: Removing Evaporator From Upper Housing Section

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