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Thread: Coolant Flush and Refill Procedure To Avoid Bleeding

  1. #11
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    Quote Originally Posted by NightFlyer View Post
    FYI, here's the diagram of the heater system - just thought it would be a handy reference on this thread.


    Awesome....Now I have plans for the night!

    Thank you for all the help.

  2. #12
    Devout Follower Of He Who Walks Behind The Rows NightFlyer's Avatar
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    Regarding the two block plugs, there's a pretty good thread on those here, including pics:

    http://dmctalk.org/showthread.php?48...in-plugs/page3
    "Driving Concours - proving it's possible with every mile!"

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  3. #13
    As seen on TV! Dracula's Avatar
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    It's also worth noting that on many of the early VIN cars, the heater core pipes are ran down the passenger's side of the frame. I'll get a picture when I have the chance.
    -Chad K.
    Previous owner of VINS: 6982, 1601, 1265, 3676, and 4590

    Dammit, Jim. I'm an undertaker, not a mechanic.

  4. #14
    Devout Follower Of He Who Walks Behind The Rows NightFlyer's Avatar
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    As to factory bleed nipples, the only one that I'm aware of is on the thermostat housing, which is often replaced with an aftermarket auto-bleeder on many cars.

    The radiator has a factory auto-bleeder, #7 in the diagram below, though Bill doesn't like how the location of the suction vortex is lower than the bleed point on the radiator, so he elongates and re-routes that hose, channeling it into the heater core return line (via a 't' connector), as opposed to the main return in the OEM setup.

    "Driving Concours - proving it's possible with every mile!"

    --Josh S.
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  5. #15
    Devout Follower Of He Who Walks Behind The Rows NightFlyer's Avatar
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    Quote Originally Posted by Dracula View Post
    It's also worth noting that on many of the early VIN cars, the heater core pipes are ran down the passenger's side of the frame. I'll get a picture when I have the chance.
    Do you know if Bill ever started a thread for his auto/self bleeders, or is that just scattered about in other threads?

    EDIT: I found it

    Here's Bill's thread discussing his self/auto bleeders in full detail, if you're interested:

    http://www.dmctoday.com/showthread.p...-Self-Bleeders
    "Driving Concours - proving it's possible with every mile!"

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  6. #16
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    I'd 100% recommend it; I have a VERY slight leak in the water pump area and the self-bleeder prevents it from causing the car to overheat.
    -Chad K.
    Previous owner of VINS: 6982, 1601, 1265, 3676, and 4590

    Dammit, Jim. I'm an undertaker, not a mechanic.

  7. #17
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    Quote Originally Posted by NightFlyer View Post
    The radiator has a factory auto-bleeder, #7 in the diagram below
    FWIW, it's actually #10...

  8. #18
    Devout Follower Of He Who Walks Behind The Rows NightFlyer's Avatar
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    Quote Originally Posted by Justin51982 View Post
    That's a question....I rented a pressure tester from autozone...excuse my ignorance, but is there a way to purge the system of air using that?
    Now I know where you got that idea from....

    http://dmctalk.org/showthread.php?12...l=1#post177530

    I'm no self-proclaimed Guru, but in my mind, if you have air trapped in the system, simply pressurizing the system without circulation will just cause the trapped air to compress, and not necessarily bleed out.

    Factory bleeder at the radiator is designed to work via a venturi effect that's created from the circulation of the coolant - that's an objective fact.

    Personally, I'll stick with gravity and circulation to bleed the air out
    "Driving Concours - proving it's possible with every mile!"

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  9. #19
    Devout Follower Of He Who Walks Behind The Rows NightFlyer's Avatar
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    Also, if there's a large amount of built up sediment packed along the bottom of the block, as is described in the Talk thread where people's drain holes were blocked by caked-up crud, flushing only through the hoses, as David suggested, won't do anything to touch that. Flushing through the drain plugs won't guarantee that you'll get it all out, or even a significant portion of it, but it will allow you to get at least some of that out and provide a more thorough flush of the engine/block.

    But David's the guru....
    "Driving Concours - proving it's possible with every mile!"

    --Josh S.
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  10. #20
    Quote Originally Posted by NightFlyer View Post
    Factory bleeder at the radiator is designed to work via a venturi effect that's created from the circulation of the coolant - that's an objective fact.

    Personally, I'll stick with gravity and circulation to bleed the air out
    Yet another Lotus bright idea that works theoretically on paper but fails in real world use.

    If the factory radiator bleeder did work in real life you wouldn't have owners pulling hoses off to bleed the radiator manually, David Teitelbaum included.

    Bill Robertson
    #5939
    Last edited by Greasy DeLorean Mechanic; 07-28-2015 at 09:10 PM.

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