brake booster leaking???? - Chevy and GMC Duramax Diesel Forum
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Old 04-10-2012, 08:57 PM   eBay Motors  #1 (permalink)
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brake booster leaking????

I just replaced my brake booster cuz I was leaking PS fluid from between the brake booster and MC. When I was putting the new booster back on, one of the o-rings from the pressure lines fell off and I couldn't find it. I replaced it and put it all back together but now I'm still leaking PS fluid from where the hard line goes into the booster, not as much as before but it's still pissing me off. Any ideas of what I can do to stop the leaking? I read somewhere that replacing PS fluid with synthetic ATF would help stop the leaking What do you guys think? Thanks.
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Old 04-10-2012, 09:07 PM   eBay Motors  #2 (permalink)
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Dino or Syn, shouldn't matter. You sure you have the right replacement?
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Old 04-11-2012, 06:58 AM   eBay Motors  #3 (permalink)
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Quote:
Originally Posted by jesselb7 View Post
I just replaced my brake booster cuz I was leaking PS fluid from between the brake booster and MC. When I was putting the new booster back on, one of the o-rings from the pressure lines fell off and I couldn't find it. I replaced it and put it all back together but now I'm still leaking PS fluid from where the hard line goes into the booster, not as much as before but it's still pissing me off. Any ideas of what I can do to stop the leaking? I read somewhere that replacing PS fluid with synthetic ATF would help stop the leaking What do you guys think? Thanks.

How hard was it to do? The 03 I just picked up has a slight leak between the hydro boost and the master cyl as well. Did you just buy a rebuild kit or replace the boost?
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Old 04-11-2012, 07:11 AM   eBay Motors  #4 (permalink)
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If it is still leaking, replace the hose. The hydro perates on high pressure-- changing to a different fluid will not help.
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Old 04-11-2012, 04:05 PM   eBay Motors  #5 (permalink)
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Quote:
Originally Posted by Hook'em_Horns! View Post
Dino or Syn, shouldn't matter. You sure you have the right replacement?
I'm pretty sure its the right part. Everything bolted right on and fit correctly, except for the stupid leak... haha.


Quote:
Originally Posted by RichieRich View Post
How hard was it to do? The 03 I just picked up has a slight leak between the hydro boost and the master cyl as well. Did you just buy a rebuild kit or replace the boost?
I just replaced the booster, it wasn't hard, just a PITA. The 4 four bolts going through the firewall and the brake pedal clip were annoying, but besides that its pretty easy.


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Originally Posted by jc1843 View Post
If it is still leaking, replace the hose. The hydro perates on high pressure-- changing to a different fluid will not help.
That makes sense. I figured I would have to do that. Do you happen to know the part # or anything cuz I was looking to see how much it would be but I couldn't find exactly what I was looking for.
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