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On a roll...grrrr
#11
Its not bad for the job but its highly unsual for a booster and MC to go out at the same time AND drip fluid. Its just not really something you hear about. MC do go bad, theres a $10-20 rebuild kit doesnt usually drip fluid if it does. MC is easy job. Likely you had a soft line bust. Second likely a hard line. Or you had leaking caliper or wheel cylinder. Brake booster? Highly suspicious. When one malfunctions its 9/10 a vacuum leak.

Heres what shops do (I do this for a living)...they dont know what the exact problem is so the throw a hail mary and want you to replace everything or most things in a system. It "covers their ass" especially with brakes because its a serious litigation point. Much more so than a drivetrain job.

Then a mechanic gets paid by the job so of he doesnt nail the problem the first time and you come back, its negative on him amd he doeant get paid. So again they like to "hail mary" and make you replace everything.
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  • Wabbit (06-12-2019)
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#12
Back in the 60's I had a master cylinder go out (rusted bore and hardened rubber piston seals) that leaked on the back side into the brake booster destroying it, Just sayin', stuff happens. I used to wrench too but not anymore if I can help it.
Brian

2000 Roadtrek 200 Versatile "The Beast" (it has been tamed hopefully)  I feed it and it doesn't bite me.   Angel
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  • Wabbit (06-12-2019), Baloo (06-28-2019)
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#13
Idk enough about them to be super authority but i do know nowa days theyre sealed. Fluid would have to be squiriting in for a long time. But again i would put money on even if it were the case of the MC squirting past the piston theyre doing a booster more out of "being safe" than anything.

Idk it comes with the territory of not being able to DIY. At least you know its all new.
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  • Wabbit (06-12-2019)
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#14
(06-12-2019, 01:54 PM)B and C Wrote: Back in the 60's I had a master cylinder go out (rusted bore and hardened rubber piston seals) that leaked on the back side into the brake booster destroying it, Just sayin', stuff happens. I used to wrench too but not anymore if I can help it.

This is kinda what he said. The master cylinder was leaking and some of the brake fluid was going into the brake booster.
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#15
The brake pedal pushes a rod into the booster that then has a diaphragm that presses against the piston in the bore. When a seal goes in the master cylinder, it allows the brake fluid to pass through. The piston and seals are installed from the backside (toward the booster). They may look sealed but are only sealed with rubber and generally held in with a C clip. At least it used to be this way. Don't know how they would get the pistons in the bore any other way.
Brian

2000 Roadtrek 200 Versatile "The Beast" (it has been tamed hopefully)  I feed it and it doesn't bite me.   Angel
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  • Wabbit (06-12-2019)
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#16
See he could clean it out and retest it. Maybe, perhaps likely, saving you a bunch of money. But it could go out down the road or started sucking residual brake fluid into the vacuum line making your engine literally smoke like a steam train. Neither is terrible. It just so happens being safe also makes money.

Heres a discussion from a quick search....brake fluid doesnt necessarily ruin a booster
https://forum.ih8mud.com/threads/brake-f...ed.885908/
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  • Wabbit (06-12-2019)
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#17
Age causes rubber to deteriorate. Smoke out the exhaust is a good indicator as well as not being able to hold a vacuum. Coincidence? Maybe. Probably just found the booster troubleshooting the master cylinder.
Brian

2000 Roadtrek 200 Versatile "The Beast" (it has been tamed hopefully)  I feed it and it doesn't bite me.   Angel
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  • Wabbit (06-12-2019)
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#18
(06-12-2019, 02:25 PM)B and C Wrote: Age causes rubber to deteriorate.  Smoke out the exhaust is a good indicator as well as not being able to hold a vacuum.  Coincidence?  Maybe.  Probably just found the booster troubleshooting the master cylinder.

Are you talking about me?

Confused
Compared to parenting, Cat herding is less complicated 
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#19
Do you blow smoke out the tailpipe? LOL
Brian

2000 Roadtrek 200 Versatile "The Beast" (it has been tamed hopefully)  I feed it and it doesn't bite me.   Angel
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#20
This just in.........
Blacktank blows black smoke out tailpipe ?
Sounds like a catasstrophy !
Hereby awarded.

T W O h s,,,,MD.

The summah awards seem to have begun.....Acceptance speeches and comments from certain staff mandatory as usual.
Stay Tuned
rvpopeye



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(What a "Stinkin' " honor !)
 


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