64 51 591 Removing and installing/replacing evaporator

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Carefully pull off bulkhead seals (1) from heater/air conditioner (2) so that there are no remaining parts left behind.

Installation:

Replace bulkhead seals (1).

Fig 1: Identifying Bulkhead Seals

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Release screws (1).

Press lock (2).

Remove pipe holder (3) complete with pipes (4).

Fig 2: Identifying Pipe Holder And Pipes

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Release screws (1).

Fig 3: Identifying Screws

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Release screws (1).

Installation:

Make sure flaps (2) are correctly seated in mountings (3).

Fig 4: Identifying Flaps And Mountings

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Release screws (1).

Remove upper housing section (2) in direction of arrow.

Installation:

Make sure upper housing section (2) is correctly seated on lower housing section.

Make sure flaps (3) are correctly seated in mountings (4).

Fig 5: Identifying Upper Housing Section

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Release screws (1).

Release clip (2).

Remove cover (3) in direction of arrow.

Installation:

Make sure cover (3) is correctly seated.

Fig 6: Identifying Cover And Screws

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IMPORTANT: Do not bend radiator fins.
If necessary, clean or straighten radiator fins with slat comb.

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

Installation:

If necessary, replace seal (3).

Make sure seal (3) is correctly seated in lower housing section (2).

Fig 7: Identifying Seal And Lower Housing Section

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Replacement:

Remove plate (2) and seal (3) from evaporator (3).

Fig 8: Identifying Plate, Seal And Evaporator

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