Advice on Bi-Passing leaking ABS

sgt_pepperband · Post by **sgt_pepperband** » Fri Mar 26, 2004 6:28 pm

I need help bi-passing a leaking ABS pump unit on a 93 legacy Turbo. This car is in mint shaape and the shop wants $1800 CDN for just the part. It's my mothers car but if I can fix it it's mine. I hate ABS to begin with.The part I am talking about sits in the engine bay near the passenger side fender and has several lines going to it, small lunch box size.

Post by **Legacy777** » Fri Mar 26, 2004 6:31 pm

Where is it leaking out of the pump?

You could try finding a used pump....someone on this board has to have a beater....or you could try a junkyard.

Other option would be to try and replumb the lines....and I wouldn't suggest that unless you really really know what you're doing.

sgt_pepperband · Post by **sgt_pepperband** » Fri Mar 26, 2004 10:24 pm

Hey 777 (J)

I think your right, the problem is the price on a new one, here in Canada some parts are outrageously priced, Parts in the States for my 64 that were 1/10th the Canadian price so when I see $1800 for a new one I am willing to bet that I can buy an after market pump or a race quality pump for half the price. I'll talk to the Subaru dealership and get their 2 cents on this to. Your info sounds 100% correct though. This car is worth keeping it has been under coated and I have been running it on synthetic since we bought it. 1 other problem is that the unit is badly corroded an removing screws will be a huge task... damn salt that we put on the road. If you find any info on used, new rebuilt or race pumps please let me know. I would love to make this car a great project. Subaru really made a killer car with the Legacy, pilarless doors and great lines. I can't let this car go. Thanks for the advice write me anytime. Specially if you see any pumps!

Jake

boostjunkie · Post by **boostjunkie** » Fri Mar 26, 2004 10:29 pm

Try here:

www.car-parts.com

evolutionmovement · Post by **evolutionmovement** » Fri Mar 26, 2004 10:32 pm

I live in a salt area, too. What I do is every month or so I go around and spray bare metal (especially screws and such) with silicon spray or WD-40 - whichever's around - just to retard corrosion. Works very well and takes no time.

Steve

ciper · Post by **ciper** » Fri Mar 26, 2004 10:40 pm

If it is the abs unit itself leaking make sure to get the right one, there are two different models.

sgt_pepperband · Post by **sgt_pepperband** » Fri Mar 26, 2004 11:10 pm

if you guys have an personal experience with replacing the unit or thoughts let me know. I owe the guy that posted the car-parts.com link. I will have to find the part number and find out if the parts listed work with the 2.2 turbo. You guys are great for help, it's like going to a Macintosh BBS everyone wants to help. PS if you guys ever get your pads changed get the mechanic to free up the bushings on the caliper. My car went from being Rally car breaking performance to North American car quality breaking. I swear if you want to fix something right you have to do it yourself!

Thanks
Jake

boostjunkie · Post by **boostjunkie** » Fri Mar 26, 2004 11:23 pm

sgt_pepperband wrote:I owe the guy that posted the car-parts.com link

You're welcome

vrg3 · Post by **vrg3** » Sat Mar 27, 2004 6:40 am

Legacy777 wrote:Where is it leaking out of the pump?

Also, Is the car an automatic or a manual?

sgt_pepperband · Post by **sgt_pepperband** » Sat Mar 27, 2004 7:53 am

It's an automatic 1993 2.2 turbo with ABS and Air. If, and I think I will order from the USA then I need to get the part right the first time so that I am not shipping parts back and forth.

vrg3 · Post by **vrg3** » Sat Mar 27, 2004 8:53 am

Hmm, in that case I think you should be able to use any unit that came out of a 1993 or 1994 Legacy with an automatic.

If I have my facts straight, there were three types of ABS hydraulic units used:

Bosch:

Four pipes in a square coming off the top, no bleeder valves, relay box on passenger side. Used on some 90-91 cars. Part number 26771AA000.

Regular Nippon:

Four pipes in a square coming off the top, two going into pipes on the passenger side, two bleeder valves on top, relay box on driver side. Used on the rest of the 90-91 cars, all 92 cars, and all 93-94 manual transmission cars. Part number 26730AA001.

Nippon 2E:

Four pipes in a line coming off the top, no bleeder valves, relay box on passenger side. Used on all 93-94 automatic cars. Part number 26731AA200.

THAWA · Post by **THAWA** » Sat Mar 27, 2004 8:59 am

has the middle one

ciper · Post by **ciper** » Mon Mar 29, 2004 7:39 pm

The middle one "Regular Nippon" is the most sexy.

vrg3 · Post by **vrg3** » Mon Mar 29, 2004 7:42 pm

ciper - Something about it having a pair of nipples perhaps?

I agree that I prefer the regular Nippon one, because of those bleeder nipples.

NuwanD · Post by **NuwanD** » Sat Apr 03, 2004 2:55 am

i've got the nippon unit as well and it has been leaking since last year... only leaks when the weather is warm so i've been ok through the winter but it just started up again this week... gotta keep topping it up every 3 weeks or so

for me it is leaking from a large 19mm? (don't remember) bolt on the front end of the unit, i'm afraid to pull the bolt out and clean up the rust behind it (causing the leak) since i don't know what the bolt is for.... just gonna toss the entire unit when i get a chance since i have the abs always turned off

ciper · Post by **ciper** » Sat Apr 03, 2004 3:40 am

How about sanding the area, using carb cleaner on it then covering it with a mountain of JB weld?

NuwanD · Post by **NuwanD** » Mon May 03, 2004 6:13 pm

The rust between the bolt and the abd unit body isn't sandable unless i remove the bolt, so that is the only option....

But that doesn't matter anymore, another joint on the unit just started leaking... not so much leaking, more like a geyser everytime I pump the brakes... now the car is undriveable as the pedal basically drops to the floor

cheers to my ever growing hate of ABS

kev-k · Post by **kev-k** » Wed Dec 08, 2004 5:53 pm

ive got a 1995 legacy with the bosch 2e abs unit
its leaking out a hole in the unit toward the bottom
it looks like it might be a relief hole or something
can anyone help me with this?

vrg3 · Post by **vrg3** » Wed Dec 08, 2004 5:59 pm

I wouldn't recommend trying to repair the hydraulic unit... It's a pretty complex piece of machinery, and lives depend on it functioning as it's meant to.

I think you'll have to replace it or bypass it.

According to the collision repair guides, if your 95 doesn't have traction control and was manufactured before October 1995, you can use a 2E unit from a first-generation Legacy.

kev-k · Post by **kev-k** » Thu Dec 09, 2004 5:55 pm

can anyone help me on installing procedures
for bosch 2e abs pump
i just puchased one to replace my leeking one never did this before

vrg3 · Post by **vrg3** » Thu Dec 09, 2004 6:08 pm

It should be pretty straightforward. Something like:

1) Disconnect negative battery terminal.
2) Disconnect hydraulic unit's electrical connectors.
3) Undo the six brake line connections using a 10mm flare-nut wrench.
4) Unbolt the mounting brackets.
5) Installation is the reverse of removal.
6) Bleed the whole brake system thoroughly.

It might be good to use a vacuum bleeder to suck all the fluid out of the system so you're not pouring caustic brake fluid all over your wheel apron, and so you start with fresh fluid afterwards.

Be really careful with the inverted flare pressure fittings. Any grit at all in the joint can make the whole fitting useless. So make sure the threads and the flare seats (on both sides) are completely clean. Don't overtorque them when reinstalling them; the torque spec is something like 13 ft-lbs.

You might end up having to get a dealer to do the final bleeding if there are any hidden passages in the hydraulic unit that don't already have brake fluid in them. But given that you're installing a used one that shouldn't be a problem. You probably will want to bleed the system again after engaging ABS a few times, though.

kev-k · Post by **kev-k** » Tue Dec 28, 2004 4:25 pm

if anyone could tell me it would be appreciated
im replacing a bosch 2 abs unit
i need to know if this unit requires cycling
with a service tool or not looked online
not much available on it
thanks

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Advice on Bi-Passing leaking ABS

Advice on Bi-Passing leaking ABS

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