How to change the water injection filter/stone

[rcompound]

In preparation of the driving season I decided to change the stone-filter in the water injection system. Purchased 13-63-7-857-605 filter, removed the 17 mm cover bolt and could see the filter but could not figure out how to remove the filter. It sits flush in a bore, it is not magnetic and is too tight to use forceps to remove it.

So I called the dealer. They don't know how to remove it and and could not find a written instruction.

Next I checked the inter-web. There was a TSB:

https://static.nhtsa.gov/odi/tsbs/20...52658-9999.pdf

No help there.

Has anyone replaced this filter and how did they do it? Gracias.

[Lienrocs]

I stuck some duct tape on the end of a screw driver. It took some fiddling but eventually I got it out.

[rcompound]

Thanks for the suggestion. It did not work for me. I went back to forceps. I bent the ends out and I was able to pull the filter out. I will keep this tool in my trailer so I have it if I need it.

[Lienrocs]

Originally Posted by rcompound

Thanks for the suggestion. It did not work for me. I went back to forceps. I bent the ends out and I was able to pull the filter out. I will keep this tool in my trailer so I have it if I need it.

How many miles on the filter you replaced and was your car not using water? Also, street only or track time as well?

[rcompound]

Purely maintenance. My miles are track miles so I want to take care of the water injection system. I was at Daytona last December and used 1.5 gallons a day so the system is working. I have the updated water system and since then the system is working perfectly.

[em4ef82]

I have been using precision tweezer (has fine tips) to pull the filter. Then air tool to blow debris from the filter housing.

[the_scotsman]

My GTS just had a water injection service done along with oil and filters. I'll pick it up later today. Is this a standard service for all GTS cars or an update to new components? I'll ask when I pick it up, just curious if anyone knows.

[Deda]

Hello,need help have same issue as you guys..how can i change it by myself?

[h_bakken]

Originally Posted by em4ef82

I have been using precision tweezer (has fine tips) to pull the filter. Then air tool to blow debris from the filter housing.

Anybody be willing to post to step by step DIY with pictures and preferred tools?

I saw elsewhere folks had trouble getting bottom o-ring out?

Any information would be appreciated!

[Lienrocs]

Originally Posted by h_bakken

Anybody be willing to post to step by step DIY with pictures and preferred tools?

I saw elsewhere folks had trouble getting bottom o-ring out?

Any information would be appreciated!

You need a 17mm socket, extension, ratchet and a pick. To pull the actual stone filter, which is the hardest part, I got some tweezers at cvs, filed them down a bbt so they're a bit thinner at the tips and bent them up in my vice. It takes about 3 minutes from start to finish now.

[h_bakken]

Originally Posted by Lienrocs

You need a 17mm socket, extension, ratchet and a pick. To pull the actual stone filter, which is the hardest part, I got some tweezers at cvs, filed them down a bbt so they're a bit thinner at the tips and bent them up in my vice. It takes about 3 minutes from start to finish now.

Thanks, that picture is super helpful. Do you find the lower O-ring difficult to get out? Or any tips for this?

[Lienrocs]

Originally Posted by h_bakken

Thanks, that picture is super helpful. Do you find the lower O-ring difficult to get out? Or any tips for this?

Get another set of tweezers but I just used a pick and it all comes out no problem. Make sure you don't over tighten the bolt so you don't pinch the o-ring. Other than that it's super simple.

[h_bakken]

Originally Posted by Lienrocs

Get another set of tweezers but I just used a pick and it all comes out no problem. Make sure you don't over tighten the bolt so you don't pinch the o-ring. Other than that it's super simple.

Do you know the torque spec off hand?

[Lienrocs]

Originally Posted by h_bakken

Do you know the torque spec off hand?

No idea. It's a rubber o-ring so just hand tight was good enough for me.

[h_bakken]

Originally Posted by Lienrocs

No idea. It's a rubber o-ring so just hand tight was good enough for me.

Cool thanks, I have lots of experience with this torque

[em4ef82]

18Nm is what I go with.

[gms.yuri]

Anybody have a picture on how to pull out the filter stone? I'm having the same problem.. Is it within the water tank / the pump? I could not find the working manual in my ista+

[SYT_Shadow]

Originally Posted by gms.yuri

Anybody have a picture on how to pull out the filter stone? I'm having the same problem.. Is it within the water tank / the pump? I could not find the working manual in my ista+

To the left of the plastic water tank you have a metal block that is the valve body. Screwing into that valve body you have a giant 17mm nut. Under that nut you will find the filter.

Lots of things go in/out of the block, but only one of them is a giant nut

[mikerunt]

Probably a silly question - but can any water work to fill the tank? Does it need to be distilled?

[schnell325]

Originally Posted by mikerunt

Probably a silly question - but can any water work to fill the tank? Does it need to be distilled?

Absolutely has to be distilled water

[SYT_Shadow]

Originally Posted by schnell325

Absolutely has to be distilled water

I bet many of the problems we hear about with the GTS water system are related to non-distilled water being used

When I change the stone filter after every weekend, it has white residue on it.

[daveishi]

Originally Posted by SYT_Shadow

I bet many of the problems we hear about with the GTS water system are related to non-distilled water being used

When I change the stone filter after every weekend, it has white residue on it.

Yep. After my experience I stand by my advice to just dump out the tank when you buy one and start with fresh water and a fresh filter. Took 3 filter changes for me to get all of the residue out of the system so it could start flowing again.