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View Full Version : Brake Booster Check Valve



JaysA4
10-25-2014, 11:11 AM
http://tapatalk.imageshack.com/v2/14/10/25/8df3cc65a9fbb3a789e8de5d8e728a4d.jpg
Has anyone ever put one together from a part store? Mine had a nipple on it that I capped. Recently during a boost leak test I noticed that I was losing boost through it like crazy. Tried to pull the cap off and the whole nipple broke off (leak area). I was able to cover the hole with some putty and tape but the boost is blowing right through it.
So if anyone has a diy that I can put together at a part store that would be cool.
If not I'll just order the whole assembly.

prizmatik
10-25-2014, 11:23 AM
Unfortunately I dont know of any DIY's for that valve, but fortunately should be an affordable part to purchase from the dealer. And the great news will be no more boost leak.

pbcrazy
10-25-2014, 12:10 PM
You have to replace that entire glossy black hose assembly to replace the check valve, they run about $90 if my memory serves me right. I actually broke the nipple off mine also and tried capping it off and found it was leaking during a boost leak test, I ended up mixing some jb weld and covered the entire hole with it and it's fine now.

walky_talky20
10-25-2014, 04:39 PM
Forget the plastic hose. Replace with normal rubber hose and good clamps, like other reasonable car manufacturers use.

Find a good check valve to replace it. You can even get a real metal one (!) from Japan's mid 90's super-quality era. 92 Camry parts FTW.


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A1 A2 German
10-25-2014, 06:45 PM
I know as rocking one.

1) Go to BAP and get 1' of the black nylon Made In Germany braided line
2) A grommet to go around that line (to go through false fire wall)
3) And a check valve

This piece is the 100% unit from brake booster to nipple on intake manifold:

http://i41.photobucket.com/albums/e259/Blakelikesfood333/Audi%20Final%20Chapter%20Build/AudiTurboBuild014_zps5334ba4e.jpg (http://s41.photobucket.com/user/Blakelikesfood333/media/Audi%20Final%20Chapter%20Build/AudiTurboBuild014_zps5334ba4e.jpg.html)


I place the check valve closest to the brake booster to hide it (under the rain tray). The check valve is a double nipple GM check valve, so I have one line to the boost gauge and other to the ebc, all hidden under the rain tray. The check valve when you look for it is yellow, but painted it black as not to stand out, or just get any standard check valve. No hose clamps need.

JaysA4
10-26-2014, 12:32 PM
Forget the plastic hose. Replace with normal rubber hose and good clamps, like other reasonable car manufacturers use.

Find a good check valve to replace it. You can even get a real metal one (!) from Japan's mid 90's super-quality era. 92 Camry parts FTW.


Sent from my iPhone using Tapatalk
Thanks man! I'll see what I can find!


I know as rocking one.

1) Go to BAP and get 1' of the black nylon Made In Germany braided line
2) A grommet to go around that line (to go through false fire wall)
3) And a check valve

This piece is the 100% unit from brake booster to nipple on intake manifold:

http://i41.photobucket.com/albums/e259/Blakelikesfood333/Audi%20Final%20Chapter%20Build/AudiTurboBuild014_zps5334ba4e.jpg (http://s41.photobucket.com/user/Blakelikesfood333/media/Audi%20Final%20Chapter%20Build/AudiTurboBuild014_zps5334ba4e.jpg.html)


I place the check valve closest to the brake booster to hide it (under the rain tray). The check valve is a double nipple GM check valve, so I have one line to the boost gauge and other to the ebc, all hidden under the rain tray. The check valve when you look for it is yellow, but painted it black as not to stand out, or just get any standard check valve. No hose clamps need.

Thanks! Exactly what I was looking for. What diameter is that hose? Never thought of running the boost gauge from there, brilliant.

A1 A2 German
10-26-2014, 03:06 PM
You can basically eye ball it, or, simply have them cut a 1" piece and walk it out to your car. They have all the hoses sizes on a sample board so you can see them.

redline380
10-26-2014, 03:54 PM
I don't even have that valve in my car, just the one in the firewall. Works fine, but may not be the best option.

mysman
10-26-2014, 06:59 PM
Yes, I used Power Brake Booster line from Napa and one of their booster check valves:

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Power-Brake-Vacuum-Hose-46875-/_/R-NBGH1451_0469683458

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx/Power-Brake-Booster-Check-Valve/_/R-UBP89000_0063318440

I routed the line through the secondary firewall by using a nylon elbow off the check valve and then the OEM right angle elbow off the IM, you can just make it out in this photo:

http://i15.photobucket.com/albums/a393/mysman/Catch_Can/Catch_Can_06_15_12002_zps6bf5753d.jpg (http://s15.photobucket.com/user/mysman/media/Catch_Can/Catch_Can_06_15_12002_zps6bf5753d.jpg.html)


This was about three years ago, it's worked perfectly since then.