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#1 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,820
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Uh-oh where does this piece go?
I have no idea what this came out of or where it goes, it looks like a riffle bullet? Any guesses? It's as thick as a pencil and about 2 1/2 inches long. This is not a trick, I honestly have no idea what this is. Please help
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#2 |
Senior Member
![]() Join Date: Jun 2005
Location: Modesto, CA
Posts: 776
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Re: Uh-oh where does this piece go?
that is the pin that pushes on the brake master cylinder. it goes into the rubber boot on your vacuum brake booster.
in this illustration its called the 'power brake vacuum booster push rod'
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Brian XNGH ECV Chapter 58 1972 Jimmy / Blazer Project 2wd 1974 Chevy Crew Cab Shorty Last edited by 396ci; 04-09-2015 at 06:33 PM. |
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#3 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,820
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Re: Uh-oh where does this piece go?
thank you so much Brian, I found it now in the pictures I took when I disassembled the brake booster, thanks again
question now is, did this genius forget to put that back in or did the new master cylinder come with a new one of these (I doubt it) and how in the world are my brakes working without it? |
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#4 |
Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,188
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Re: Uh-oh where does this piece go?
I think I got two different ones with my new Delco booster.
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#5 |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,820
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Re: Uh-oh where does this piece go?
Thanks Tucsonjwt, that's interesting, in my case though I did not buy a new booster, I just cleaned and painted my old one, I just bought a brand new master cylinder and that did not come with one of these push rods
FYI: I did pop mine back in real quick, and to be honest with you it really made no difference, so I am still super puzzled on how the brakes could have worked without it, puzzled |
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#6 |
Senior Member
![]() Join Date: Jul 2009
Location: Tomball, Texas
Posts: 1,592
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Re: Uh-oh where does this piece go?
Is the Greg perhaps a magician?
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Rick 78 GMC K15 SWB, 350/NV4500/NP205/4.10s Project Hazel 71 GMC C25 350/TH400 - Project Angie 59 Chevy SWB Stepside (next in line? Not sure now ![]() 2001 GMC Sierra K2500 |
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#7 |
Registered User
Join Date: Jul 2012
Location: Des Moines IA
Posts: 1,250
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Re: Uh-oh where does this piece go?
The pin simply centers itself into the piston on the master cylinder, that's why it's got a bullet shaped nose. It's not the only part that moves forward to move the master cylinder piston, so the piston was still being pushed forward by the booster sleeve, it just wasn't being centered. It needs to be centered to minimize wear over time, so short term the brakes will still work without this centering pin.
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- 1981 Sierra 454, NV4500 swap - 2006 Z06, 25k miles - 1973 Nova - Project CarNova Virus on Youtube |
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#8 | |
Post Whore
![]() Join Date: Aug 2014
Location: Sacramento, CA
Posts: 10,820
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Re: Uh-oh where does this piece go?
Quote:
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