Anyone flushed heater core on f series
Anyone flushed heater core on f series
Author
Discussion

sams255

Original Poster:

23 posts

104 months

Monday 1st December
quotequote all
Changed auxiliary pump on f11 530d. Driver side is cold and passenger side is hot when heating is on, so is it the heater core that could be blocked and needs to be flushed ? Or could it just be trapped air ?

Edited by sams255 on Monday 1st December 16:32

AlexGSi2000

620 posts

214 months

Monday 1st December
quotequote all
Have you scanned for codes? May well be one of the heater valves / motors.

sams255

Original Poster:

23 posts

104 months

Monday 1st December
quotequote all
There was one code and then I cleared the code and 600 miles later still not come back



bigdom

2,258 posts

165 months

Monday 1st December
quotequote all
Did you follow the bleed procedure?

Coolant System Self-Bleeding Procedure

Before starting: Ensure the vehicle is on level ground and the battery has sufficient charge.

Preparation: Top up the coolant expansion tank to the maximum mark and leave the cap off.

Ignition ON: Get into the driver's seat with the key. Press the Start button once to put the ignition into accessory mode (engine must not be started).

Heater Settings: Set the cabin heater temperature to maximum (hottest setting) and the blower fan speed to its lowest setting.
Activate Bleed Cycle: Depress the accelerator pedal (gas pedal) to the floor and hold it there for about 10 seconds. The electric coolant pump will start to run, and you will hear coolant circulating.

Wait: Release the pedal and allow the pump to run its cycle. The process takes approximately 12 minutes, during which the pump runs intermittently at various speeds to push air out of the system. The auxiliary pump is also activated during this time.

Top Up: Once the pump automatically switches off, check the coolant level in the expansion tank and top it up to the correct level if necessary.

Repeat if Needed: Run the procedure 2-3 times to ensure all air pockets are removed.

sams255

Original Poster:

23 posts

104 months

Monday 1st December
quotequote all
bigdom said:
Did you follow the bleed procedure?

Coolant System Self-Bleeding Procedure

Before starting: Ensure the vehicle is on level ground and the battery has sufficient charge.

Preparation: Top up the coolant expansion tank to the maximum mark and leave the cap off.

Ignition ON: Get into the driver's seat with the key. Press the Start button once to put the ignition into accessory mode (engine must not be started).

Heater Settings: Set the cabin heater temperature to maximum (hottest setting) and the blower fan speed to its lowest setting.
Activate Bleed Cycle: Depress the accelerator pedal (gas pedal) to the floor and hold it there for about 10 seconds. The electric coolant pump will start to run, and you will hear coolant circulating.

Wait: Release the pedal and allow the pump to run its cycle. The process takes approximately 12 minutes, during which the pump runs intermittently at various speeds to push air out of the system. The auxiliary pump is also activated during this time.

Top Up: Once the pump automatically switches off, check the coolant level in the expansion tank and top it up to the correct level if necessary.

Repeat if Needed: Run the procedure 2-3 times to ensure all air pockets are removed.
Mine doesn't have an electric pump. It's has a manual pump on the engine driven by the belt. The auxiliary pump is the only electric pump I have. I have been told it will self bleed etc