1971 Fleetwood Brougham rebuild problems
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1971 Fleetwood Brougham rebuild problems in Past Cadillac Vehicle Discussion; I'm having some trouble with the restoration of my 1971 Fleetwood Brougham. First of all there is no coolant tank. ...
  1. #1
    -V8- is offline Cadillac Owners Member
    Automobile(s): 1971 Fleetwood Brougham 472
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    Exclamation 1971 Fleetwood Brougham rebuild problems

    I'm having some trouble with the restoration of my 1971 Fleetwood Brougham.

    First of all there is no coolant tank. After the engine reaches its temperature, from a loose hose near the radiatorcap there's coolant running down leaving the coolantlevel in the radiator to drop signifanctly.
    Considering this is a 71, shouldn't there be a seperate expansiontank? Also if I squeeze the top hose on the radiator I can hear air escaping from the loose hose. Even if cold, shouldn't the radiatorcap seal of the hose completely?

    Second there seems to be a ground problem. The electrical seats and the trunk remote won't work anymore, but if I try them the buzzer and engine hot-light will come on. Only way to stop the buzzer is to open the drivers door.
    If I have the keys in lock-position and open the door no buzzer/light whatsoever. I understood that was the way to check the light, because it has a seperate grounding from the other warning lights that work on the ignition?
    Powerlocks won't work as well, used to work fine.

    And aren't the windows supposed to close themselves a little firmer after closing the door?


    I really have no idea where to search this what I consider to be a groundingproblem. It all used to work fine a couple of years ago before it got of the streets. Car hasn't been out in maybe 6 years, interior has been rebuild but most of the electrical is left untouched.

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  3. #2
    Fleetwood472 is offline Cadillac Owners Fanatic
    Automobile(s): 78 Fleetwood w/ FI 472/ Switch pitch TH400
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    Re: 1971 Fleetwood Brougham rebuild problems

    There should be a coolant tank. That loose hose coming off of the radiator is supposed to go to the coolant tank when the engine cools and it gets sucked back in when the engine warms up. The electrical problem sounds pretty strange. Has someone hacked up the wiring in the past? You could be getting a short somewhere too.

  4. #3
    -V8- is offline Cadillac Owners Member
    Automobile(s): 1971 Fleetwood Brougham 472
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    Re: 1971 Fleetwood Brougham rebuild problems

    The car used to belong to a friend of mine, and he stored it away working. So it should be some minor electronical malfunction, but I have no idea where to look.

    Anyone has a picture of the coolant tank of a 71? I've been Googling voor some weeks but can't seem to find any clear pictures of location, shape and direction of the hose.

  5. #4
    -V8- is offline Cadillac Owners Member
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    Exclamation Re: 1971 Fleetwood Brougham rebuild problems

    Also, the fuelmeter is going insane, tank is empty but the indicator is completely to the right, almost off the gauge. Way past the 'F'.
    Is this a grounding problem as well? Where is the grounding cable located from the engine to the shell, maybe that's the bad connection?

  6. #5
    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: 1971 Fleetwood Brougham rebuild problems

    The 71 might not have a recovery tank. I know my 71 Pontiac, and my both my 65 Chevy's don't. None loses any coolant in summer driving. If it is regularly puking coolant out, the rad cap is bad.

  7. #6
    cadillac_al is offline Cadillac Owners Connoisseur
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    Re: 1971 Fleetwood Brougham rebuild problems

    Some places sell universal coolant tanks. I got one to put on my 70 Impala but ended up using one from a mid 70's impala or cutlass that mounts to the inner fender. I don't understand how these cars were supposed to work without one.

    Fuel gauge on full means the sending unit has lost ground.

  8. #7
    carnut is online now Cadillac Owners Master
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    Re: 1971 Fleetwood Brougham rebuild problems

    You can add an aftermarket recovery tank, but the tank requires a radiator cap with 2 gaskets. One just under the cap, another at the bottom. That way the radiator's neck is sealed completely. The hose that seeps air needs to either be replaced or secured to not seep air. A fuel gauge max'ed out means the wiring to the tank float are disconnected somewhere. Check the wiring by the rear bumper for being disconnected.

  9. #8
    -V8- is offline Cadillac Owners Member
    Automobile(s): 1971 Fleetwood Brougham 472
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    Re: 1971 Fleetwood Brougham rebuild problems

    Thanks for all the replies! I'll be working on the Cadillacs cooling system this weekend.

    Looks like the electrical problems might be coming from a poor fusebox.
    Anyone knows if there's a difference between the original fuseboxes from a 71 Fleetwood to a Sedan de Ville, Coupe de Ville etc?

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