[Hxm99]

hello guys

I'll cut it short. I drained my coolant and then refilled with water bled the system and decided to run the engine whilst stationery. All of a sudden this code popped up

[Chappers 71]

Did you run the water pump to short cut the drain procedure?

[Hxm99]

Originally Posted by Chappers 71

Did you run the water pump to short cut the drain procedure?

Originally Posted by Chappers 71

Did you run the water pump to short cut the drain procedure?

Nope, I just bled the system twice (2 flushes) with all the pipes and radiator plugs installed( one of the pipes was leaking droplets). I Then finally added de ionised water and bled the system one last time and after this I started the engine( on previous flushes I didnt start the engine just bled and flushed) . I just had a feeling something wasn't right so I connect carly ASAP and this code popped up.


I then shut the car moved the leaky pipe a little(pipe was not leaking at this point when I moved it, this is the pipe to waterpump from rad). Bled the system once again( bleeding worked cos I heard the pump) ran the car again, cleared the codes and codes did not seem to come back, however the pump was not squirting water into the reserve when I opened the cap to check, only upon cranking the heater the pump started squirting water. I ran the car for approx 20 mins on the second occasion and ran the diagnostic about 3-4 times but code did not come back. can this be the waterpump on its way out or something else?


also, the battery was quite weak when I first cranked the car, like very weak and I didnt wanna jump or connect a jump pack because I heard they aren't good for bimmers

[Chappers 71]

If the batterys old replace it & code/register it. A weak battery will cause all kinds of strange seemingly unrealated issues.

If your doing any work that involves using power with the engine of or coding, it's always wise to hook the car up by the under bonnet charging points to an auxiliary power source

[Hxm99]

Originally Posted by Chappers 71

If the batterys old replace it & code/register it. A weak battery will cause all kinds of strange seemingly unrealated issues.

If your doing any work that involves using power with the engine of or coding, it's always wise to hook the car up by the under bonnet charging points to an auxiliary power source

Originally Posted by Chappers 71

If the batterys old replace it & code/register it. A weak battery will cause all kinds of strange seemingly unrealated issues.

If your doing any work that involves using power with the engine of or coding, it's always wise to hook the car up by the under bonnet charging points to an auxiliary power source

I dont think this code had anything to do with the battery. I mean come on, a cooling system code pops up, straight after I work on the said system? unlikely to be battery.

Can this be a sign of the waterpump on its way? my cars on 98k and as far as I am aware UK car pumps last easily over that mileage, waterpumps usually go bust on US cars right?

Also, is it safe to run the car on distilled water for a day or two? just wanna get a really good clean of the system

[Silver Streek]

Don't the European cars have the electric pump as an auxillary pump, the main pump being a belt driven pump. I thought that it was commonplace for the electric auxillary pump to fail and just be left as it's not really needed. Please correct me if I am wrong.

You don't need it to bleed the system out. Had no problem bleeding mine when I flushed it out.

[Hxm99]

Originally Posted by Silver Streek

Don't the European cars have the electric pump as an auxillary pump, the main pump being a belt driven pump. I thought that it was commonplace for the electric auxillary pump to fail and just be left as it's not really needed. Please correct me if I am wrong.

You don't need it to bleed the system out. Had no problem bleeding mine when I flushed it out.

As far as I'm aware. no, we don't have a belt driven pump

[Silver Streek]

Have you checked on realoem?

Just checked mine and I have a machanical water pump. Might be worth checking.

[0l0dom0l0]

You're referring to the diesels.

N53 is electric waterproof only. Along with N52, N54, N55 etc

[Silver Streek]

Originally Posted by 0l0dom0l0

You're referring to the diesels.

N53 is electric waterproof only. Along with N52, N54, N55 etc

Ahh OK I didn't realise all the petrols had electric water pumps.