Coolant error

[shawnj]

Has anyone experienced this error? My coolant tank started bubbling over today. Looks like there is a leak in the upper radiator coolant hose, replacing that. Scanned with Carly.

Message: Carly for BMW - detailed Fault-Code Log

Found Faults:
--Engine / Motor--
*** 377A:Engine cooling system: shutdown coolant pump for blocking ***
Fault-Set 1 - ( 179160 km)

Coolant temperature OBD: -48.00 °C
Water pump Power consumption: 67.00 A
Water pump temperature electronics: -50.00 °C
Water pump voltage: 19.50 V

Fault-Set 2 - ( 944 km)

Coolant temperature OBD: -48.00 °C
Water pump Power consumption: 62.00 A
Water pump temperature electronics: 37.00 °C
Water pump voltage: 0.00 V

Fault-Set 3 - ( 1560 km)

Coolant temperature OBD: -48.00 °C
Water pump Power consumption: 59.50 A
Water pump temperature electronics: -50.00 °C
Water pump voltage: 13.30 V

Fault-Set 4 - ( 1064 km)

Coolant temperature OBD: -48.00 °C
Water pump Power consumption: 0.50 A
Water pump temperature electronics: -50.00 °C
Water pump voltage: 11.80 V

[davis449]

My coolant tank let go on 10/1. I didn't run diag. codes on it when that happened because it was pretty obvious what was wrong. Had it replaced and the system flushed 10/3. Sounds like you may have found a leak. Replace that hose, clear codes, and run the diag. again is what I would do.

[shawnj]

Originally Posted by davis449

My coolant tank let go on 10/1. I didn't run diag. codes on it when that happened because it was pretty obvious what was wrong. Had it replaced and the system flushed 10/3. Sounds like you may have found a leak. Replace that hose, clear codes, and run the diag. again is what I would do.

Thanks for your reply man! I'm hoping I can do it all myself.

[shawnj]

I replaced the hose, and cleared the codes. Threw in more coolant/distilled water. It was fine last night during and after my drive. This morning after a drive to work, it seems like it bubbled over again. I checked for codes and got nothing!

I replaced my water pump and thermostat maybe a few months ago.

[Dackelone]

Originally Posted by shawnj

I replaced the hose, and cleared the codes. Threw in more coolant/distilled water. It was fine last night during and after my drive. This morning after a drive to work, it seems like it bubbled over again. I checked for codes and got nothing!

I replaced my water pump and thermostat maybe a few months ago.

Did you bleed your cooling system - back when you did your water pump?

Also just bc a part is new doesn't mean the part is good!! Hopefully you have a parts warranty on the water pump. ?

[Jeff@TopGearSolutions]

Try bleed procedure then go from there.

Open the hood and remove the radiator cap
Key fob inserted, no brake pedal, press Start
Driver and Pass air temp controls all the way to max temp
Press the defrost button to turn it on
Manually adjust the fan speed to the slowest setting (not off)
then hold the gas pedal down all the way for 10 seconds.

The water pump will begin to pump water slowly at first and faster within a few seconds
The water will squirt from a very small opening just under the cap threads in the reservoir
If there was any air in the system, this will purge it and will show you that the pump is operational as well.
I had to put the cap back on after about 15 seconds as it started to splash out from the force.

This should work on any electric powered water pump cars according to the tech

[1and1]

Are you able to review/log coolant temps with something like MHD or an Accessport?

[shawnj]

Well, looks like the leak is coming from the edges of the expansion tank, not sure how that got fucked up BUT i'm hoping that is the cause now. Thoughts?

[shawnj]

I bled the system, water pump working, definitely had air in there but the stream was pretty strong. The tank definitely is leaking. Thanks for sending the steps over!

[shawnj]

Replaced the tank and tried to bleed the system again. Now the fan just runs really high. I was hoping it wasn't the water pump