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Found the reason for my overheating problem

Discussion in '365 GT4 2+2/400/412' started by Al Campbell, May 14, 2014.

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  1. Al Campbell

    Al Campbell Formula Junior
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    Nov 22, 2013
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    Australia
    #1 Al Campbell, May 14, 2014
    Last edited by a moderator: Sep 7, 2017
    After doing all the usual things like checking the thermostat, radiator cap & rebuilding the radiator I have finally found the cause of my overheating issues. There is no nut on the waterpump impeller? There is no sign of the nut, lock tab or washer so I don't know if they have been pushed up into the engine water gallery or if they were just not installed in a previous service. At least the shaft looks OK so it will not be an engine out job but the front housing & impeller do not look cheap.
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  2. bjwhite

    bjwhite F1 Rookie
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    #2 bjwhite, May 14, 2014
    Holy crap, that's nuts!
     
  3. ArtS

    ArtS F1 World Champ
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    #3 ArtS, May 14, 2014
    On Ferraris that nut is an option.
     
  4. willrace

    willrace Three Time F1 World Champ
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    #4 willrace, May 14, 2014
    OUCH!! . . . . . These days, you may be right, though :D
     
  5. Ak Jim

    Ak Jim F1 Veteran
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    #5 Ak Jim, May 14, 2014
    Sir, did you want the standard service or the deluxe service?
     
  6. Al Campbell

    Al Campbell Formula Junior
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    #6 Al Campbell, May 16, 2014
    The parts are on order. I was right it wont be cheap! The front cover, impeller, bush, nut, locking tab, washer & set of seals came to about $1100 AUD. Now for the long wait for them to arrive.
     
  7. simon klein

    simon klein Two Time F1 World Champ
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    #7 simon klein, May 16, 2014
    STREWTH !!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     
  8. ArtS

    ArtS F1 World Champ
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    #8 ArtS, May 18, 2014
    Buy a parts car from the States, it will be cheaper in the end...
     
  9. BigTex

    BigTex Seven Time F1 World Champ
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    #9 BigTex, May 18, 2014
    I would have reused the impeller....

    I recently had my water pump done here (they did need parts support on the bearings and seals from Ferrari) but they put a shiny one in my hand for about $465USD.

    Good luck on your (finally) cool running car!

    I am waiting on some radiator fans now....
    :D :D :D
     
  10. Al Campbell

    Al Campbell Formula Junior
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    Nov 22, 2013
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    Australia
    #10 Al Campbell, May 20, 2014
    Eurospares have advised me that they can't get the water pump cover part # 104328.

    Does anyone have any leads on a new or good secondhand one?

    Cheers Al
     
  11. Al Campbell

    Al Campbell Formula Junior
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    #11 Al Campbell, Jun 2, 2014
    Last edited by a moderator: Sep 7, 2017
    I'm happy to say that my overheating issue has been sorted.
    A new impeller, bush, seals, lock tab & nut were fitted. I ended up taking the water pump front cover off the other 400I that I'm slowly restoring until I can get a replacement from Maranello Parts who are getting these remade.
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  12. finnerty

    finnerty F1 World Champ

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    #12 finnerty, Jun 3, 2014
    Can the old one just be re-surfaced ? Brass (impeller) on aluminum (cover) should not have worn away too much material --- just a lot of galling. The gap tolerance between impeller fins and cover surface should not be too critical...... I might be inclined to take comparative measurements against the good one, and see if you can make her fly :). heck you may not even need to bother with resurfacing ---- just clean up any burrs and sharp edges so they don't shed pieces later into the system ????
     

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