Brake Booster Question

Brakes, Suspension, Rims and Tires

  1. garyh

    garyh Well-Known Member

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    I pull the '66 Imp out for a ride and had No power Brakes and Hissing from under dash when Brakes applied. Is it Time for a Booster Rebuild ? Drove car last week about 75 miles and it was fine. All hoses are in place and Booster is Original. Any Thoughts ? Thanks in advance .
     
  2. live4theking

    live4theking Old Man with a Hat

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    Time for a rebuild. You can either send it to Booster Dewey on the west coast or there is a company in Ontario Canada. (@cbarge we need a name.)
     
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  3. Big_John

    Big_John Illegitimi non carborundum FCBO Gold Member

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  4. Snotty

    Snotty Senior Member FCBO Gold Member

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    It could be the check valve is broken and leaking. Check that first as it's rather simple to check and replace.
     
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  5. garyh

    garyh Well-Known Member

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    The hissing appears to be coming from the brake pedal push rod (Inside of car).
     
  6. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    Hissing under the dash is a clear indicator of a dead booster.

    Mine is currently at "Booster Dewey" as Big _John mentioned, since mid-September. It's a six week turnaround time (I'm good with that), so you'll have to plan for an immobile Imp unless you can find a temporary/borrowed booster like I fortunately did from a member here.
     
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  7. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    That means it's NOT the check valve on the outside of the unit. Definitely a dead booster from either a torn vacuum diaphragm or failed valve inside the unit.
     
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  8. mikedrini

    mikedrini Well-Known Member FCBO Gold Member

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    Just for another option, you can check these guys out as well:

    Rebuild and Return - Harmon Classic Brakes
     
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  9. garyh

    garyh Well-Known Member

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    What is the going rate for a rebuild these days ?
    It's a Bendix unit.
     
  10. Trace 300 Hurst

    Trace 300 Hurst Professional Tinkerer FCBO Gold Member

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    From Booster Dewey home page....plus shipping to-and-fro.
    upload_2021-10-13_15-44-6.png

    upload_2021-10-13_15-44-54.png
     
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  11. cbarge

    cbarge World Famous Barge in a Budget FCBO Gold Member

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  12. John Kirby

    John Kirby Member

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  13. bigmoparjeff

    bigmoparjeff Senior Member

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    The B body boosters have a smaller pushrod and the bolt pattern for the studs that mount the booster to the car are different. You have to make a bunch of modifications to use it. It's not worth the trouble. Just get yours rebuilt.

    Jeff
     
  14. detmatt

    detmatt Old Man with a Hat FCBO Gold Member

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    The longer we talk about it the longer you’ll be waiting to get it back from Dewey and Steve.:lol:
     
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