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Thread: 1967 Eldorado Coolant Flush

  1. #1
    13ir14314's Avatar
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    1967 Eldorado Coolant Flush

    I'm in the process of getting the car ready for winter and decided that it is time to flush the old nasty coolant. I flushed the heater core and radiator and they flow nicely. Before I put new coolant in I want to flush the engine and get it clean too. I was thinking I could just pour water in the outlet where the thermostat is but it looks like it will just run through the pump and out the lower radiator hose and not through the motor, right? How do I properly flush and add anti-freeze to the motor?


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    basscatt's Avatar
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    Re: 1967 Eldorado Coolant Flush

    Quote Originally Posted by 13ir14314 View Post
    I'm in the process of getting the car ready for winter and decided that it is time to flush the old nasty coolant. I flushed the heater core and radiator and they flow nicely. Before I put new coolant in I want to flush the engine and get it clean too. I was thinking I could just pour water in the outlet where the thermostat is but it looks like it will just run through the pump and out the lower radiator hose and not through the motor, right? How do I properly flush and add anti-freeze to the motor?
    ---------------------
    here is what you need -



    the Prestone flush-n-fill kit -
    less than $6 - with free shipping - on ebay -
    http://www.ebay.com/itm/Prestone-Flu...643948&vxp=mtr

    or Walmart - or any auto parts store should have it -
    you tap into the heater hose - connect the garden hose -
    it back-flushes the entire cooling system -

    see this video -
    http://www.youtube.com/watch?v=i36pDzhFkBQ

  4. #3
    70eldo's Avatar
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    Re: 1967 Eldorado Coolant Flush

    There are service stations (all fluids) that offer a flush. They will have a unit that flushes the coolant system. I know I had it done in Tucson in '99 and I have never found a service station in Holland or Germany that can flush the whole cooland system. So I always had some old coolant left in the system since then when I replaced it.

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    13ir14314's Avatar
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    Re: 1967 Eldorado Coolant Flush

    Thanks for the tips. I had the car running and now its not again so I can't bring it anywhere. Everything is very easy to access, that's why I was flushing components individually. I was going to flush it with a garden hose in the summer but it never happened so now I'm stuck with a bucket and a funnel.

    I did some looking in there service manual of the coolant flow path and pictures of the pump and I think I should be able to just power water in the outlet where the thermostat is and it will go through the block and the through the pump and out. I thought that the thermostat housing was the outlet for the pump and that all the water I put in would just come out, but that's not the case.

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    Ranger's Avatar
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    Re: 1967 Eldorado Coolant Flush

    Unless there is a lot of rust or some snake oil additive in the system a simple drain and refill would suffice.

  7. #6
    13ir14314's Avatar
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    Quote Originally Posted by Ranger View Post
    Unless there is a lot of rust or some snake oil additive in the system a simple drain and refill would suffice.
    I don't belive there are any snake oils in it but it's all water from when I was running it. I wanted to flush the crap out before putting new coolant in but never did and now winter is coming and I have to get anti-freeze in there. I thought that if I did a simple drain and fill water would still be sitting in the block and freeze.

  8. #7
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    Re: 1967 Eldorado Coolant Flush

    Well, by drain and refill I assumed you would start the car and run it a bit to circulate the coolant and mix it with any water remaining in the engine.


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