64 51 001 Cleaning Evaporator

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

64 1 280

WARNING: When handling cleaning agent, observe following protection measures:
Wear protective rubber gloves and protective goggles.
If cleaning agent comes into contact with eyes or skin, wash immediately with lots of water.

IMPORTANT: To avoid dirtying vehicle interior:

Close all air vents
Heater - A/C system must be switched to recirculated-air mode
Cover carpet in work area

Recycling:

Carry out the cleaning operation in a suitable washing bay as the emerging cleaning agent escapes through the drain openings in the transmission tunnel.

After completing cleaning, allow car to drip-dry for approx. 5 minutes.

Necessary preliminary tasks:

Remove transmission underbody protection . See 24 00 023 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP26Z/6HP32Z) .
Move steering column in "top" and "extended" position.
Remove evaporator temperature sensor . See 64 11 943 REPLACING EVAPORATOR TEMPERATURE SENSOR (HIGH AUTOMATIC A/C) .

Release screw (1).

Remove left footwell air duct (2) in direction of arrow.

Installation:

Make sure air duct in footwell on left (2) is correctly seated on heating - A/C system (3).

Fig 1: Removing Left Footwell Air Duct

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!
To avoid damaging special tool 64 1 280, carry out a function check before starting cleaning.

It must be possible for the folding spray element (1) to be inserted exactly into guide lug (2) so that special tool 64 1 280 can be guided out of heater without incurring damage.

Fig 2: Identifying Spray Element, Guide Lug And Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Insert guide lug of special tool 64 1 280 into opening (1) for evaporator temperature sensor and leave in this position.

Guide (1) must be firmly seated in opening for temperature sensor (2).

Arrows (3) must point in direction of travel.

Fig 3: Identifying Opening, Guide Lug And Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Move spray lance (1) inwards.

Release clamping screw (2) and pull out guide wire (3) in order to position the folding spray element vertically.

Connect spray lance (1) to spray equipment.

By carefully moving spray lance (1) back and forth, spray a uniform amount of cleaning agent onto evaporator.

Fig 4: Moving Spray Lance Back And Forth

Courtesy of BMW OF NORTH AMERICA, INC.

After completion of cleaning and subsequent flushing, slide spray lance (1) into middle of heater.

Release clamping screw (2) and push in guide wire (3) in order to position the folding spray element horizontally.

For this purpose, the heat-shrinkable sleeve located on guide wire (3) must rest against clamping screw holder.

Secure guide wire (3) with clamping screw (2) in this position.

It is now possible for the folding spray element to be inserted exactly into the guide lug so that special tool 64 1 280 can be removed carefully from the heater.

Fig 5: Identifying Slide Spray Lance, Clamping Screw, Guide Wire And Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Set heating - A/C system to footwell ventilation and fresh-air mode. Open windows/doors.

Start car and run heating - A/C system at max. fan power for approx. 5 minutes in order to dry evaporator.

In order to eliminate the last remnants of cleaning agent, repeat this procedure shortly before handover to the customer.