Anyone have a noisy water injection pump?

Simon H · 06-03-2018, 07:52 AM

Hi Chaps,

Following on from the other water injection thread, regarding the no use of water, could I ask if the GTS lads have a noisy pump? We have a DTM Championship Edition M4 and can plainly hear the water injection pump being noisy - what can only be described as a spitting, bubbling sort of sound coming from the rear. And no water consumption at all. Could this be a similar problem to the other thread, and we need the filter replacing? Wanted to try remedying it ourselves before taking it to the dealers. Any help appreciated.

TIA

Day Laborer · 06-03-2018, 10:26 AM

Quote:

Originally Posted by Simon H

Could this be a similar problem to the other thread, and we need the filter replacing?

Yes. Best way to confirm is to use a diagnostic tool like Carly Bmw, it would show water injection low pressure, or drop in pressure too high.

I believe this issue is very very common..

Please post pics of that crazy limited edition DTM championship M4!!

Simon H · 06-03-2018, 11:08 AM

Quote:

Originally Posted by Day Laborer

Yes. Best way to confirm is to use a diagnostic tool like Carly Bmw, it would show water injection low pressure, or drop in pressure too high.

I believe this issue is very very common..

Please post pics of that crazy limited edition DTM championship M4!!

Hope you like

View post on imgur.com

RandyC54 · 06-03-2018, 07:36 PM

I like that rear spoiler much better than the GTS!!

Brasko · 06-08-2018, 09:46 PM

Quote:

Originally Posted by RandyC54

I like that rear spoiler much better than the GTS!!

Agreed. Feels at home on this model.

M4_GTS · 06-12-2018, 09:50 AM

Quote:

Originally Posted by RandyC54

I like that rear spoiler much better than the GTS!!

They are exactly the same in shape. Only difference are the 2 uprights.

Day Laborer · 06-12-2018, 10:50 PM

When I had "Water injection pressure too low" error codes, water pump still made noise as you describe, but after it the filter was replaced- it was much more louder.

I believe a lot of M4GTS's are affected by this issue, best way to routinely check is by using a diagnostic tool like BMW Carly and/or monitoring your sports display gauge

gingerbread · 06-15-2018, 03:00 PM

when does the pump make noise?

Darth One · 07-13-2018, 09:47 PM

Reviving this discussion after two months post the "repair"...

After the car came back from the shop, it did make a noise. It's kind of between whirring and whining, and increases in volume with engine speed. I presume this is from the pump.

Water consumption is minimal. Haven't had to fill up the tank for about 800-1000 miles. There has been some decrease in water level though.

This is the kind of issue that really sucks because you don't quite know whether you have a problem or not. The car drives fine and it's not like I'm willing to dyno to see if I'm getting all 500 horsies. The pump whine is annoying though, and I see myself getting fed up with that soon

Day Laborer · 07-14-2018, 10:27 PM

Quote:

Originally Posted by Darth One

Reviving this discussion after two months post the "repair"...

After the car came back from the shop, it did make a noise. It's kind of between whirring and whining, and increases in volume with engine speed. I presume this is from the pump.

Water consumption is minimal. Haven't had to fill up the tank for about 800-1000 miles. There has been some decrease in water level though.

This is the kind of issue that really sucks because you don't quite know whether you have a problem or not. The car drives fine and it's not like I'm willing to dyno to see if I'm getting all 500 horsies. The pump whine is annoying though, and I see myself getting fed up with that soon

Buy a Carly OBDII device and app/ you can check for error codes that will tell you if water injection pressure has errors. Or take it to redline while watching your sports display; it should hit 500HP mark each clean pull.

You might reconsider your GT4 over GTS comment if in fact you find out that the water injection wasn't working properly and start driving it when fixed.

From what I know, I don't hear the water injection pump whirring and whining while driving- only when I turn the car off (when it flushes back into the tank)

I'll post up the repair order notes in my next post

Day Laborer · 07-14-2018, 10:30 PM

See below

Darth One · 07-15-2018, 08:11 AM

Quote:

Originally Posted by Day Laborer

You might reconsider your GT4 over GTS comment if in fact you find out that the water injection wasn't working properly and start driving it when fixed.

haha! fair enough.

i saw your posts about Carly but was all, i don't want to buy something just to diagnose this

but i did some pulls last night and again this morning on my breakfast run and the sport display does hit 500-ish

so i guess the real issue is granny driving and too much crawling in traffic

it looks like i will have to take it back for the whining noise though - mine is totally different. you can hear it the whole time the car is at speed. thanks for all the input.

Day Laborer · 07-15-2018, 09:28 AM

Quote:

Originally Posted by Darth One

haha! fair enough.

i saw your posts about Carly but was all, i don't want to buy something just to diagnose this

but i did some pulls last night and again this morning on my breakfast run and the sport display does hit 500-ish

so i guess the real issue is granny driving and too much crawling in traffic

it looks like i will have to take it back for the whining noise though - mine is totally different. you can hear it the whole time the car is at speed. thanks for all the input.

For me, if it is ever below 500 on the sports display at redline (w/o TC going off) then something is wrong - its either at 500 or above, never below.

Anytime it reads below, I check for codes, and sure enough there's always a code.

I had my stone water filter cleaned twice, replaced twice and finally had the valve and pump replaced.

Certainly, the any power input below 5000 rpm the car only feels like a regular M4 ZCP, but, just as the GT4, above 5000 rpm, the car is bonkers!

Lowering the car to race height, suspension settings at race, and max aero also made a world of difference - truly transforms the car the way its intended to be.

Good luck on the whining noise, the only downside to this car is parts availability

Darth One · 09-05-2018, 10:51 PM

update - pump works fine. the whine was the differential. i feel dumb because it sounded exactly like a diff whine, but i got confused because it only started when the water pump stone filter was replaced. so i was blaming the wrong system all along. now i have another question, which i'll ask in another thread.

06-03-2018, 07:52 AM	#1
Simon H Major 876 Rep 1,319 Posts Drives: M5 Competition Join Date: Mar 2010 Location: UK iTrader: (0)	Anyone have a noisy water injection pump? Hi Chaps, Following on from the other water injection thread, regarding the no use of water, could I ask if the GTS lads have a noisy pump? We have a DTM Championship Edition M4 and can plainly hear the water injection pump being noisy - what can only be described as a spitting, bubbling sort of sound coming from the rear. And no water consumption at all. Could this be a similar problem to the other thread, and we need the filter replacing? Wanted to try remedying it ourselves before taking it to the dealers. Any help appreciated. TIA
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06-03-2018, 07:36 PM	#4
RandyC54 Salty Middle Aged Dog 142 Rep 165 Posts Drives: 2016 M4 GTS Join Date: Feb 2017 Location: Richmond, VA iTrader: (0)	I like that rear spoiler much better than the GTS!! __________________ 2018 Porsche GT2 RS, Black 2018 Mercedes GLS63 AMG, Black, DD and TV 1997 BMW E31 840i, Black (fully restored!!)
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06-12-2018, 10:50 PM	#7
Day Laborer Lieutenant Colonel 1746 Rep 1,889 Posts Drives: M5 CS / iX 50i Join Date: Dec 2009 Location: NY, NY, CT, PA, MD, VA, DE, FL iTrader: (11) Garage List [0.00]	When I had "Water injection pressure too low" error codes, water pump still made noise as you describe, but after it the filter was replaced- it was much more louder. I believe a lot of M4GTS's are affected by this issue, best way to routinely check is by using a diagnostic tool like BMW Carly and/or monitoring your sports display gauge __________________ https://www.instagram.com/day_laborer/ *(DM me from this account)* Email: nextlevelautobrokersdc@gmail.com Part-time with Next Level Auto Brokers, LLC https://www.instagram.com/nextlevelautobrokers/
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06-15-2018, 03:00 PM	#8
gingerbread Enlisted Member 51 Rep 48 Posts Drives: BMW Join Date: May 2016 Location: Canada iTrader: (0)	when does the pump make noise?
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07-13-2018, 09:47 PM	#9
Darth One drunk poster 6613 Rep 3,649 Posts Drives: M4 GTS \| E46 M3 Join Date: Jul 2008 Location: FL iTrader: (0)	Reviving this discussion after two months post the "repair"... After the car came back from the shop, it did make a noise. It's kind of between whirring and whining, and increases in volume with engine speed. I presume this is from the pump. Water consumption is minimal. Haven't had to fill up the tank for about 800-1000 miles. There has been some decrease in water level though. This is the kind of issue that really sucks because you don't quite know whether you have a problem or not. The car drives fine and it's not like I'm willing to dyno to see if I'm getting all 500 horsies. The pump whine is annoying though, and I see myself getting fed up with that soon
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07-14-2018, 10:30 PM	#11
Day Laborer Lieutenant Colonel 1746 Rep 1,889 Posts Drives: M5 CS / iX 50i Join Date: Dec 2009 Location: NY, NY, CT, PA, MD, VA, DE, FL iTrader: (11) Garage List [0.00]	See below Attached Images __________________ https://www.instagram.com/day_laborer/ *(DM me from this account)* Email: nextlevelautobrokersdc@gmail.com Part-time with Next Level Auto Brokers, LLC https://www.instagram.com/nextlevelautobrokers/
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09-05-2018, 10:51 PM	#14
Darth One drunk poster 6613 Rep 3,649 Posts Drives: M4 GTS \| E46 M3 Join Date: Jul 2008 Location: FL iTrader: (0)	update - pump works fine. the whine was the differential. i feel dumb because it sounded exactly like a diff whine, but i got confused because it only started when the water pump stone filter was replaced. so i was blaming the wrong system all along. now i have another question, which i'll ask in another thread.
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