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  1. #1
    Join Date
    Oct 2016
    Posts
    5

    Default Vacuum hose to no where

    http://New to this, first time posting. I would like to thank this board a lot of outstanding information I used so far. I have a 68 Riviera that I owned from 1970. The last time I used it was 19 years ago when I started it up and put it in drive and almost went through my neighbors front window. No brakes. So 19 years later I was smart enough to changed all the brakes, spark plug wires, points and oil. I didn't know enough when I started it up to prime the oil. I thought it was in the oil pan. Wrong. I correct that by taking off the oil sensor and pumped oil through it. It works great after all these years.

    But my question is I have a vacuum hose coming out of the firewall and I don't know where it should be connected. I can't find an item that is missing a hose. Attach Is a photo. It's right below the relay left hand side. Two vacuum line one is connected to a canister and the other one is the problem. Thank you

  2. #2
    Join Date
    Feb 2002
    Location
    LI,NY
    Posts
    19,976

    Default Re: Vacuum hose to no where

    Are you talking about the two vacuum lines on the right side of the photo? Those are for the vacuum headlights. Your service manual has the vacuum schematic
    Jason Cook
    BPG #1675
    "Expert in obsolete technology"

    1968 Riviera GS- some assembly required
    1969 Riviera GS- my first car
    1969 GS-350
    1970 Stage 1 4 speed Aquamist
    1970 GS-455 Bamboo Cream beater
    1971 GS 455 11.93@113.36
    1972 GS-350
    1970 Stellar Industries vintage go kart

    Deo duce, ferro comitante

  3. #3
    Join Date
    Oct 2016
    Posts
    5

    Default Re: Vacuum hose to no where

    no, its the vacuum line that is touching the two wires from the relay above

  4. #4
    Join Date
    Aug 2013
    Location
    St Louis Missouri
    Posts
    556

    Default Re: Vacuum hose to no where

    It looks like the hose that goes to the heater control valve?
    Brian

  5. #5
    Join Date
    Oct 2016
    Posts
    5

    Default Re: Vacuum hose to no where

    Thank you Brian, I will check it out tomorrow. As I said earlier, the car was starting up great. Then I took the vacuum lines off the headlights to work on the canisters. I tried to start the car up today and it would crank but no spark. The vacuum lines wouldn't do that, would they?? Would it effect the vacuum advance on the distributor?

  6. #6
    Join Date
    Feb 2010
    Location
    Live Oak Florida
    Posts
    7,835

    Default Re: Vacuum hose to no where

    That line should run vac from the heater valve to the control inside the car.
    ROA Member # 13359
    BCA #46919
    BPG #2320
    68 Riviera: Show car.
    78 Regal:Track car 1.47 60'- 7.00.9 1/8 mile, 11.14 1/4

  7. #7
    Join Date
    Oct 2016
    Posts
    5

    Default Re: Vacuum hose to no where

    I looked at the hoses for the heater and there is no valve. Where should it be

  8. #8
    Join Date
    Oct 2003
    Location
    Ottawa-Stittsville, Ontario, Canada
    Posts
    4,399

    Default Re: Vacuum hose to no where

    That line connects to the small heater/AC control vacuum tank which is hidden up above the main vacuum storage tank, under the left fender, (...p120-50 in shop manual) !
    The hose connections are under the small vacuum tank just to make it more of a challenge when tracing, replacing or reconnecting them ?
    That line runs from the heater/AC control, and the other one runs down to the main vacuum distribution manifold on the lower firewall.

    . . . get a '68 Buick Shop Manual, all the vacuum line info is in there + answers to questions you haven't even thought to ask yet !!
    It's the Bible for your car !
    Last edited by Rivman; 10-24-2016 at 01:08 PM.
    Randy Hunter / ROA Charter Member #155 - '68 Buick Riviera GS (clone) '"The JEWAL"
    ...previous Buicks: '68 LeSabre 400 2dr hdtp,'68 Wildcat 2dr hdtps (2), '68 Riviera (2 parts cars),'80 LeSabre V6 4 dr (...long gone slug)
    Check out the ROA here: www.rivowners.org ,and my '68 Riviera here: http://www.v8buick.com/garage_vehicl...w_vehicle&id=1

  9. #9
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,439

    Default Re: Vacuum hose to no where

    Quote Originally Posted by Rivman View Post
    . . . get a '68 Buick Shop Manual, all the vacuum line info is in there + answers to questions you haven't even thought to ask yet !!
    It's the Bible for your car !
    Yes!

    http://www.ebay.com/sch/i.html?_from...anual&_sacat=0
    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    THM400 with Ultimate 258mm converter, Gear Vendors OD
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's Race weight 4025lbs.
    Best E.T. 11.54 Best MPH, 116.06
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

  10. #10
    Join Date
    Oct 2016
    Posts
    5

    Default Re: Vacuum hose to no where

    Took your advice, just purchased bible. Thank you

  11. #11
    Join Date
    Oct 2003
    Location
    Ottawa-Stittsville, Ontario, Canada
    Posts
    4,399

    Default Re: Vacuum hose to no where

    Smart move !
    Possibly the best investment you could make when it comes to maintaining your vintage '68 Riviera, or any other automobile !
    I know you will find a lot of information in it !
    Randy Hunter / ROA Charter Member #155 - '68 Buick Riviera GS (clone) '"The JEWAL"
    ...previous Buicks: '68 LeSabre 400 2dr hdtp,'68 Wildcat 2dr hdtps (2), '68 Riviera (2 parts cars),'80 LeSabre V6 4 dr (...long gone slug)
    Check out the ROA here: www.rivowners.org ,and my '68 Riviera here: http://www.v8buick.com/garage_vehicl...w_vehicle&id=1

 

 

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