Brake booster check valve

**02nms4** · 06-19-2016 10:46 PM

Almost ready to get my build on the road, forgetting this little piece.

Anyone use a different check valve or have any ideas? This one leaks and was thinking about just putting a standard old school check valve on the firewall and putting vacuum hose to the manifold fitting.? Thanks in advance pic of my bay:

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**f4m0u5** · 06-20-2016 04:55 AM

Perfect, put a check valve in the fire wall fitting then run a hose from there to manifold
Also block the hole in the accordion hose and ur done

If the check valve that was located at rhe accordion hose is still good then you can use that as the check valve. And u can use the original connector for the intake manifold if you cut it off the old brake booster hose

**julex** · 06-20-2016 06:57 AM

^^ you'll be fine without suction pump.

**02nms4** · 06-21-2016 08:23 AM

Thanks guys, already deleted the fitting on the maf hose so I figured I'd just use a check valve,

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**S4tech2** · 06-21-2016 05:40 PM

There was some repair kit from Audi but I don't remember what parts were involved. Post what you do cuz I need to do this as well.

**Timtheguru** · 06-21-2016 09:21 PM

Ran into this the other day.

https://www.ecstuning.com/b-genuine-...mp/078133753a/

**BrillBlackb5S4** · 06-22-2016 12:49 AM

http://forums.quattroworld.com/s4/msgs/55436.phtml

Good write up, did this works great. Used both original check valves, and that oem brake booster hose. Also plugged accordion .

**S4tech2** · 06-22-2016 06:19 AM

^ this is pretty much what I was talking about

**BrillBlackb5S4** · 06-22-2016 02:42 PM

Originally Posted by S4tech2

^ this is pretty much what I was talking about

You have to use this hose, part # N0203901 ,or equivalent, or you will have problems. I used autozone hose ,and it got destroyed, and had a stiff pedal.

**julex** · 06-23-2016 09:23 AM

I've used simple stiff air hose for air tools for last 4 years or so, no sign of degradation. I wouldn't use silicone hose since it would collapse in most likeliness.

**christianb5s4** · 06-23-2016 09:39 AM

I used heater hose for my early style brake booster line and it's been fine for over a year, Julex do you have a link to that hose?

**julex** · 06-23-2016 11:31 AM

Originally Posted by christianb5s4

I used heater hose for my early style brake booster line and it's been fine for over a year, Julex do you have a link to that hose?

No, sorry. It was just a coil of hose for air tool which I threw on a pile of "reuse for something else" since the hose was way too stiff to not piss me off when I was trying to work air tool :).

**02nms4** · 06-23-2016 05:39 PM

I ended up using a GM ,check valve and an autozone vacuum hose from the help section at autozone, clamped it and it seems fine. Time will tell though. If I would have known about the parts mentioned sooner I would have gone that route. If it fails that's what I'll be doing. Thanks again guys!

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**02nms4** · 06-23-2016 10:13 PM

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**BrillBlackb5S4** · 06-24-2016 12:43 AM

Originally Posted by 02nms4

I ended up using a GM ,check valve and an autozone vacuum hose from the help section at autozone, clamped it and it seems fine. Time will tell though. If I would have known about the parts mentioned sooner I would have gone that route. If it fails that's what I'll be doing. Thanks again guys!

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https://www.ecstuning.com/ES258822/?...FQcfhgodOFgHWA

If that ends up not working out

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