Aux Water Pump -

[one2gamble]

Im assuming the big puddle of water in the middle of my engine block is from the Aux Water Pump?

I dont have anywhere to do the swap myself so does anyone know how much this would usually run at the stealership?

[MiniRS4]

dont replace it.

DELETE IT! just get an extension or get a hose long enough to make it to both ends.

[one2gamble]

I still have to rip off the top of the motor to do it though correct?

[MiniRS4]

I still have to rip off the top of the motor to do it though correct?

yea, im pretty sure the intake mani has to come off. but you maybe be able to do it w/o removing it. after disconnecting, pull it our the back, by the firewall.

-G

[Daft]

dont replace it.

DELETE IT! just get an extension or get a hose long enough to make it to both ends.

Geno, you should not delete it. The reason it is there is to pull boiling coolant from the CHRAs when you shut the car off and pull it up to the coolant tank to allow the gas bubbles to re-condense.

You should buy the OEM relocation kit and move it to the from of the motor right above the alternator. This way, should it ever leak again, it's a 30min job to replace.

[mholme]

It can be done with the manifold in place, though it's not easy to do.

[MiniRS4]

Geno, you should not delete it. The reason it is there is to pull boiling coolant from the CHRAs when you shut the car off and pull it up to the coolant tank to allow the gas bubbles to re-condense.

You should buy the OEM relocation kit and move it to the from of the motor right above the alternator. This way, should it ever leak again, it's a 30min job to replace.

you have a very valid point, but the remedy is letting the car idle longer before you pull the key. in my case, i just let the car sit and cool via turbo timer. also, unless you run the car really really hard n shut it down right away, it shouldnt be an issue, no?

my 2 cents.

[Daft]

According to the 2.7T self-study guide, the pump is meant to pull coolant in a backwards flow through the CHRAs and cylinder head to ensure that any vapour bubble actually do make it out of the cooling sleeves. I'm assuming here that even the normal flow of coolant (that flow being from the actual water pump) isn't capable of drawing these vapour bubbles out properly and thus the need to use a reversed flow pattern.

It also says that the Aux pump coolant sensor will activate the pump any time the coolant in the rear pipe exceeds the preset value. It also runs the fans at 40% speed at those times too.

[lowered97a4]

u can pull it right out from underneath the manifold gotta take the air pump out if u have it and some vacumme lines and couple small things

[one2gamble]

Geno, you should not delete it. The reason it is there is to pull boiling coolant from the CHRAs when you shut the car off and pull it up to the coolant tank to allow the gas bubbles to re-condense.

You should buy the OEM relocation kit and move it to the from of the motor right above the alternator. This way, should it ever leak again, it's a 30min job to replace.

Does this have to be sourced from Audi, I dont care for my dealer much.

[syxxty]

I just replaced my aux water pump. I called my dealership about the relocation kit. They had no idea what I was talking about. I even had a tech bulliten (found in Bently) giving them the part numbers and still had no record. My dealership SUCKS. I was unable to find the relocation kit so I just replaced it. Hope it doesn't start leaking again.

[k_harley]

If you delete do you have to install resistors to keep CEL light off? Ive done this on VW's before and it never tripped one, but I know these ecu's are a lot smarter.

[2k1audiS4]

I will aviod this thread because I am still in denial that mine is leaking.

[VR4-S4]

I replaced mine. It sucks that you cant just buy a new gasket because thats the only thing that was wrong with my original one.

[eliTTe]

you can do the job with or without removing the IM, check the FAQ, there is writeups showing both methods.

[ThirdStrike]

common misconception - "the aux water pump is only for cooling turbos down after running." .... hmm wrong. it circulates coolant throughout the entire engine after shutdown. VR6's are n/a and have them.
dont delete it.
i dont see how you could do it without removing the intake manifold.... there's barely any space

[samtimtom]

Mine was cracked and the dealership installed a new one at the relocated position per Audi's recommendation under my extended warranty. The dealership SHOULD have a relocation kit.

[code7rpd]

Anyone have the part numbers for the relocation kit?

[Blake260]

I took mine apart and resealed it with RTV. A cheap fix but It hasnt leaked in about 5K mi so far.

I do plan on replacing the pump eventually. just 100 bucks I would rather spend on something moar awesome. haha

[casawhites4]

part numbers on relocation kit would be great.

[RedRocketS4]

s
e
a
r
c
h

http://www.daftsgarage.com/relocationkit.pdf

[jeffp477]

Anyone have the part numbers for the relocation kit?

078998998 go to genuinevwvwaudiparts.com

[awd2ks4]

078998998 go to genuinevwvwaudiparts.com

anybody have a pic of the relocation kit installed?

[SummitS4]

im also leaking alot of coolant. how can i tell if its the aux pump and not the main water pump? anyone have a pic?

[rstyleuk]

http://www.audiworld.com/tech/eng69.shtml

[julex]

Too add to this discussion, not engough that you should not delete the pump, you should also replace temp sensor for aux pump system with 93c one so that it actually kicks in each time it is needed. The default sensor is something like 107c which is way to high for this system to trigger on all occasions it might be needed.

I did this mod and finally I can see it working. It never kicked in for me prior to.

[jinsoojoo]

Too add to this discussion, not engough that you should not delete the pump, you should also replace temp sensor for aux pump system with 93c one so that it actually kicks in each time it is needed. The default sensor is something like 107c which is way to high for this system to trigger on all occasions it might be needed.

I did this mod and finally I can see it working. It never kicked in for me prior to.

I know this is an old thread but...


Julex, I am interested in replacing my default sensor. I also do not ever hear the aux coolant pump kick in. Could you give us a little bit of info about where the sensor is located and where I could find one? Also, is there a way to test the aux coolant pump?

Thanks so much!

[01audia4]

Back of the coolant hard pipe passenger side. PureMS for the sensor.

Sent from my SCH-I535 using Tapatalk