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Rad Expansion Tank

Discussion in 'Mondial' started by LouB747, May 26, 2015.

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  1. LouB747

    LouB747 Formula 3

    Apr 8, 2009
    2,123
    Huntington Beach, CA
    Full Name:
    Lou Boyer
    #1 LouB747, May 26, 2015
    Last edited by a moderator: Sep 7, 2017
    Trying to get my 86 3.2 back to it's normal self. Tracking down a "running a little warmer than usual" problem, I first thought the Rad Cap was bad. Easily replaced. Same problem. It's obvious the expansion tank itself is rusting through. So, how easy is this to replace myself? A few bolts, a few hoses? I'm no mechanic but I can turn a wrench. A better question probably, what's a good price for one and would you buy a used one?

    I really want to drive my car, and I'm hoping this is the final step!
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  2. 123howie

    123howie F1 World Champ

    Jul 3, 2014
    16,017
    El Segundo CA
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    Howie
    #2 123howie, May 26, 2015
    Not a expert on these but I hope the inside looks better?
     
  3. hank sound

    hank sound F1 Veteran

    Jan 31, 2004
    5,953
    Burbank, CA
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    Hank Garfield
    #3 hank sound, May 26, 2015
    Hey Lou,

    Call FerrParts, in Sacotomato (Sacramento) - (916) 974-1939. Ask to speak to Punu.
    This should be an easy fix.

    Cheers,

    Hank
     
  4. LouB747

    LouB747 Formula 3

    Apr 8, 2009
    2,123
    Huntington Beach, CA
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    Lou Boyer
    #4 LouB747, May 26, 2015
    My mech says he has one on the shelf and will put it in for $300. Doesn't sound bad to me. I've seen them priced from 370 - 650.
     
  5. LouB747

    LouB747 Formula 3

    Apr 8, 2009
    2,123
    Huntington Beach, CA
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    Lou Boyer
    #5 LouB747, May 26, 2015
    Thanks so much for the info. I may just go with my mechanic, even though I'd like to do it myself. Needs to go in for an oil change, so I'll just have him do both.
     
  6. soucorp

    soucorp F1 Rookie

    Sep 20, 2011
    4,816
    Old Dominion
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    Mike
    #6 soucorp, May 26, 2015
    Sounds like a deal to me... Just make sure its from a Mondial 3.2/QV. While you are at it, you should flush out the old coolant, replace the termostat and refill and bleed. That should take care of the over heating if its not related to the fan or waterpump. If you want to repair it yourself, its just a few bolts, will need to clean out the rust and weld it.

    Best,
    Mike
     
  7. 308mon

    308mon Karting

    Oct 5, 2014
    169
    UK
    #7 308mon, May 26, 2015
    Last edited by a moderator: Sep 7, 2017
    Wait until you see the underside!. The inside may be OK if the coolant mix has been kept within specification. The tank in the attached photo was refurbished satisfactorily and the cooling system flushed and re-filled (thermostat and pump checked as well).

    Straightforward job to remove the tank. 3 fixings to the top (try not to lose the small metal sleeves inside the rubber bushings) along with 2 pipes and the air by-pass valve under to loosen and remove. Have a container handy to catch the cooling mix when the pipes are taken off.

    The 2 mounting bolts for the air by-pass valve may well be badly rusted and can easily break off when attempting to remove the securing nuts. I have used thermal conducting epoxy to re-attach the valve to the tank when the bolts have sheared off.
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  8. MvT

    MvT F1 Rookie

    May 25, 2013
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    Tijn
    #8 MvT, May 26, 2015
    30min of work if you have a new one. There is a little drain underneath to get most of it out. or simply unplug the lower thick hose and catch the coolant. From there it is 2 bolts and one nut, a connector and the auxiliary valve underneath and it's off. Anyone can do this as log as you keep the hose higher then the tank you will not need to bleed system.

    HTH
    Tijn
     
  9. MvT

    MvT F1 Rookie

    May 25, 2013
    4,261
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    Tijn
    #9 MvT, May 26, 2015
    Ps, if it is leaking from the inside out the tank is practically not to be saved.. Hope you find a good tank still.
     
  10. dfranzen

    dfranzen Formula 3
    Owner

    Aug 31, 2013
    1,577
    Ponte Vedra Beach , FL
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    Don Franzen
    #10 dfranzen, May 26, 2015

    Lou,

    Ill buy your old one if you decide not to use it!
     
  11. LouB747

    LouB747 Formula 3

    Apr 8, 2009
    2,123
    Huntington Beach, CA
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    Lou Boyer
    #11 LouB747, May 26, 2015
    Yeah, I'm pretty sure I'll be going with a new one. Or used in "good condition". So I'll send you pics of the old one.
     
  12. Mondial 1985

    Mondial 1985 Formula Junior

    Jun 13, 2012
    344
    Greenville, SC
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    Mark Alan Day
    #12 Mondial 1985, Jun 3, 2015
    Correct! Punu has been a great help to me since aquiring the Mondial. I actually prefer Ferrparts to the others.
     

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