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Expansion Tank Cap Question

Discussion in '308/328' started by miketuason, Feb 25, 2010.

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  1. miketuason

    miketuason F1 World Champ
    Owner Silver Subscribed

    Feb 24, 2006
    15,811
    Cerritos, CA.
    Full Name:
    Mike
    #1 miketuason, Feb 25, 2010
    I have the 0.9 bar cap which is what the book calls for for my year 84QV but many of you uses the 1.1 bar, is there any reasons for using the 1.1 bar?
    Edit/Delete Message
     
  2. flyngti

    flyngti Formula 3

    Jul 16, 2009
    1,246
    Snohomish, WA
    Full Name:
    Eric L
    #2 flyngti, Feb 25, 2010
    By raising the pressure limit, the boiling point of the coolant is higher. The thinking here is that by raising the boiling point, the coolant will remain liquid to provide cooling if the temperature goes higher than "normal operating level."
     
  3. BigTex

    BigTex Seven Time F1 World Champ
    Owner Rossa Subscribed

    Dec 6, 2002
    79,380
    Houston, Texas
    Full Name:
    Bubba
    #3 BigTex, Feb 25, 2010
    It's a Technical Bulletin, to go to the higher value, it superceeds the older Manual.

    If you are not loosing fluid it may not matter, here in the Tropics, it does.
     
  4. 4redude

    4redude Formula Junior

    Jan 13, 2005
    732
    Fungus Corner
    Full Name:
    Brian Keegan
    #4 4redude, Feb 26, 2010
    I don't recall any Technical bulletin Tex, but Ferrari did supersede the part number from 101499 (0.9) bar to p/n 137644 which looks the same but is a 1.1 bar unit. The change was done around 1989/1990 on the 348's and Testarossa's IIRC.
     

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