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ferrari 348 gauge help

Discussion in 'Technical Q&A' started by Majin_JT, Mar 4, 2009.

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  1. Majin_JT

    Majin_JT Formula Junior

    Mar 15, 2008
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    JT
    #1 Majin_JT, Mar 4, 2009
    Last edited by a moderator: Sep 7, 2017
    hi everyone you have proberly heard this question a million times . anyway no matter what im doin in the car the temp gauge on the left as shown on the pic ( got pic from another source many thanks ) it never hardly moves it may move to the right a tiny bit but im not talking alot is this normal any advice or help would be great many thanks

    john
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  2. No Doubt

    No Doubt Seven Time F1 World Champ

    May 21, 2005
    72,740
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    Mr. Sideways
    #2 No Doubt, Mar 4, 2009
    It's not uncommon for the oil temp sensor to fail. Cheap and easy bolt in replacement job.
     
  3. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
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    Jeff B.
    #3 Miltonian, Mar 5, 2009
    That's the oil temperature gauge.

    Couple of things to bear in mind, John. The 348 holds a lot of oil, and the majority of the oil is in the dry sump tank, not in the hot engine. All of the oil in the tank has already passed from the engine, and through the oil cooler. The sending unit for the oil temperature gauge is on the tank, not on the engine, so the gauge isn't reading the temperature of the oil in the engine, it's reading the temperature of the oil in the tank. The oil temp reading doesn't normally go up even to halfway unless the car is being hard, or sitting for an extended period in traffic, on a hot day.

    It's also fairly common for the oil temp reading to be erratic, or to not function at all, if the oil tank isn't properly grounded to the frame.
     
  4. Majin_JT

    Majin_JT Formula Junior

    Mar 15, 2008
    395
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    Full Name:
    JT
    #4 Majin_JT, Mar 5, 2009
    wow thanks for the info so how or where do i look to see if its fitted correctly if not what do i do many thanks again

    john
     
  5. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
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    Jeff B.
    #5 Miltonian, Mar 5, 2009
    I don't think you have a problem, John.

    If you want to visually check the sending unit, it's on the very bottom of the right side of the oil sump tank, with one wire going to it. If the tank isn't grounded properly, you can do an easy test by making up a jumper wire with a couple of clips on the ends, and hooking them up to nice clean spots on the tank and the frame. Then drive the car for a while and see if the reading looks different. If it does, you can make up a permanent ground wire for the tank. This repair is listed in a factory service bulletin from August 1992.
     

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