My master cylinder seized up and I bought a replacement.  The new one came in and it doesnt match the old.  It also will no work with my current master cylinder.

now I have no idea whether the old ones are correct or fi the new booster is.

here are both

notice the mounting surface is completely different.

here is the old booster

and the new booster

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http://www.vetteprojects.com/bmv

Ben...can you look in the area I circled on this pic, and see if you can see the numbers? That will give us an idea of the year, and part number, so we can possibly confirm it's original application....

|UPDATED|10/13/2013 7:40:19 PM (AZT)|/UPDATED|


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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

yeah ill look, ill have to wire brush the paint off.   This part is supposedly the same from 68-76..  can anyone look and see what shape theirs is?

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http://www.vetteprojects.com/bmv

I know the booster on my '74 is flat where the master bolts up, as your "original" is. Can't say I've ever noticed one that was sunken in, as the new on is. I'm also thinking some big blocks had a smaller diameter booster to help clear the valve covers....

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

it looks like they sent you the booster for 64 to 67 not the 68 to 76

This style (sunken) is what willcox, corvette central and paragon all sell Those paragon does have a rebuilt original that look like my old one None of them seem to understand the difference between these boosters even though it is obvious

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http://www.vetteprojects.com/bmv

I brushed the paint off that area and there is no part number


(large image modified to link-aapple)


|UPDATED|4/9/2014 9:56:18 AM (AZT)|/UPDATED|


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http://www.vetteprojects.com/bmv

Dang...sure looked like they were there. There ARE numbers stamped on the front of that thing...somewhere....assuming it is an original Delco booster. If it is a reman, or aftermarket replacement, then all bets are off....

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Can anyone post pictures of their booster from a 69

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http://www.vetteprojects.com/bmv

Okay can so done post pictures of any boosters from 68-76??? I am tying to return the part and they are claiming it is correct.

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http://www.vetteprojects.com/bmv

Sorry Ben....I don't have any pics of mine...or anyone else's either, for that matter...

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Here is a restoration page for a 1971

@ adamsapple you should be able to tell which one it is just from a picture on the car.


@rraider1

|UPDATED|10/18/2013 8:28:03 PM (AZT)|/UPDATED|


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http://www.vetteprojects.com/bmv

I believe my '69 big block has the original booster. The only identifying number on it is near the vacuum port. It is either 4240 or 424D. I will add pictures as soon as I figure out how.

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Mark 


(click on image for larger view!)

States I've visited:

The MBM booster is a Delco reproduction....I've been told that it is a GM authorized replacement for the Bendix style booster originally fitted to some cars but I have no data on what years of corvette had the Bendix. Where is the incompatibility? Is there a gap or space between the new boosters push rod and the plunger on the MC? If this is the case and you were to order a new deep hole corvette style reproduction MC they will come with an adapter to fill that gap. Its about a 1" long round steel plug with a machined recess on one end (to fit the booster rod in to). The MC is designed for power and manual brakes. You use the spacer for power...no spacer for manual. I sell these parts but have not tackled the booster install on a corvette....yet. Will be converting to power brakes in the near future. Dave

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My Christmas present to ME! Bought Sat 11-30-2013. 72, 350 4 spd, Silver with blue interior...Can't you just hear Pablo Cruz playing in the background?

the bolt spacing for the master cylinder was wrong.  I would up getting a rebuilt original.

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http://www.vetteprojects.com/bmv

Looks like you finally got the correct booster...waHOO!
It's getting closer Ben...a little at a time. 

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"