Coolant Escape from Overflow after shutdown - Any ideas?Monaco Wagon 383

Heating, Cooling & AC

  1. 413

    413 Active Member

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    I must question the advice to fill radiator to the top, even with a recovery bottle. Many old time radiator repair men (are there any other kind?) say to leave the air space in there for a cushion. Air expands and contracts, coolant does not. Leads to radiator leaks.
     
    Last edited: Feb 18, 2019
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  2. ceebuddy

    ceebuddy Well-Known Member

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    True. If you look closely, you can see the coolant puddle in this 1969 Imperial press photo:

    69imp_press04b.jpg

    Or in this photo found in the new-car issue of the Plymouth Traveller:
    20190218_224023.jpg
     
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  3. cbarge

    cbarge World Famous Barge in a Budget FCBO Gold Member

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    I agree always leave an inch from the top of cap for room.
     
  4. livininharrow

    livininharrow Senior Member

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    looking at both of those photos it appears the cars are on an upward grade. this would lead me to believe the drivers just didn't make it quick enough to the bushes. hence the fluid being in front of the vehicles and not underneath. hope this helps.
     
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  5. DJAstral

    DJAstral Member

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    Thanks for that - looks good, very helpful.
    for that
     
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  6. DJAstral

    DJAstral Member

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    Thanks for that, I fitted a coolant recovery system yesterday & am changing the cap as you advise for a regular one today or tomorrow when it arrives.
     
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  7. DJAstral

    DJAstral Member

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    Thanks for that, I’m SO scared of breaking the bolts but will heat as you suggest.
     
  8. DJAstral

    DJAstral Member

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    Hi there, yes it is just a very small amount & it does seem to stabilise like you say but this is one of those many occasions when I wish I lived in the US! ... we don’t have such stores over here in Scotland, UlK sadly but I’ll track one of those things down if I suspect the gaskets thanks. There is not a fix-it culture over here, most folk drive new, boring, Japanese or European hatchbacks or throw-away 4x4s
     
    Last edited: Feb 19, 2019
  9. TxDon

    TxDon Active Member

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    With a coolant recovery system the coolant expands into the bottle when it expands and is drawn back into the rad when it cools. No strain on the rad, all cars have used this system since the 1970s.
     
  10. DJAstral

    DJAstral Member

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    Thanks for that seems like a better system altogether. I converted it yesterday & put a new 16LB standard vented cap on today. I’m going to continue to maintain the correct level in the radiator & not overfill it though, so as still to allow for expansion.
    Looking forward to trying it soon, will post my findings when I get the chance.

    Thanks to everyone once again for all the prompt responses and helpful advice. This is such a great forum, so glad I found it!
     
    Last edited: Feb 20, 2019
  11. Snotty

    Snotty Senior Member FCBO Gold Member

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    You're welcome. I put one of those on the '62 I had, as well as my Son's Gremlin. I bought them at the annual Western Street Rod Nationals in Bakersfield, CA. You can probably find one in a street rod magazine.

    20150711_105812.jpg
     
  12. 413

    413 Active Member

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    I Understand how it works. I can see the value. But. Only of the radiator was designed for that.

    The point is that the old radiators need to have airspace inside to allow for expansion and contraction. If no air space then every part of the system does all the expanding and it will lead to cracks and leaks. Example: old heater core and radiator failure.
     
  13. BillGrissom

    BillGrissom Active Member

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    I'll 5th the suggestion that an air space at the top of the radiator is normal. As example, for a time I would notice the coolant level in the radiator being down ~2" below the cap in our 2002 T&C 3.8L V-6 van, so would top it off. After repeating many times, I noticed the level in the coolant reservoir had increased. I read "air at top is normal", so stopped topping it off. Indeed, most Owner's Manuals today tell you to check the reservoir level (and don't fool w/ radiator cap), which is probably simpler than trying to educate owners on the "why".

    If thinking "2002 engine is totally different", my 3.8L has pushrods, 2 valve/cyl, and the rocker arms are shaft-mounted stamped-steel and look almost identical to the rockers in my 1965 383 engine. The only differences are: 2 less cyl, alum head, roller lifters, oil-pump integral w/ timing cover, and modern fuel and ignition controls. All of these can be upgraded on my 1965 engine (exc. #cyl & oil pump).

    BTW, I switched to Evans Waterless Coolant in 6 of our 7 vehicles, so no more boil-overs or corrosion worries. Downside is that if you do have a small coolant leak you are motivated to find it ($42/gal).
     
  14. Brent Martini

    Brent Martini New Member

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    Just wondering what recovery bottle did you use ? I’ve been considering one for my 72 imperial and 1970 charger
     
  15. DJAstral

    DJAstral Member

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    Hi there Brent, you’ll probably be quite amused to learn that the coolant recovery bottle I used is a 1.5 Liter Kirkland Golden Margherita Mix square plastic bottle filled 1/3 full of neat coolant!!!
    I drilled a hole to match the size of radiator overflow hose (which I trimmed slightly so it sits about 1 inch above the bottom of the bottle) and another two small breather holes in the screw on plastic cap.
    The size of it snugly fits in between the radiator and the inner bracing plate next under where the battery tray sits. I secured it with a couple of big zip ties. Actually looks quite pleasing, although not original & best of all cost me nothing at all! Works a treat so far & because the bottle is clear I can keep an eye on things.
     
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  16. ceebuddy

    ceebuddy Well-Known Member

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    :lol: I used a sturdy 1.5 liter PET Pepsi bottle...
     
  17. Snotty

    Snotty Senior Member FCBO Gold Member

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    I posted the one I use in a picture above, response #31. Also in #18.
     
  18. Ripinator

    Ripinator Senior Member

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    The FCBO chief judge has deducted ten points from both of you. . .
     
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  19. Dobalovr

    Dobalovr Being on the Cbody diet SUCKS! FCBO Gold Member

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    I used this one from a late 80’s D100

    14C34B37-62D8-4084-9CEA-DBCB41F4E4A2.jpeg
     
  20. DJAstral

    DJAstral Member

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    Oh well, I suppose that’s us in trouble then!