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What happened to my oil temp gauge

Discussion in '348/355' started by Dice996C4S, Nov 10, 2007.

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  1. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #1 Dice996C4S, Nov 10, 2007
    Hi Guys.. I took my car to a reputable indie shop in my area.. Loved his work.. my car had a semi-minor service such as oil change, gear oil change, spark plugs, spark plugs wire and brakes...

    However, when I pulled out of the shop, my oil gauge suddenly was not working anymore... I was thinking that the connecter may have been accidentally unplugged or is loose. Do you guys know what areas I should look at ?

    I think that the gauge itself is not busted as the needle moves a bit when turning the ignition on...

    Any ideas will be greatly appreciated...
     
  2. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
    Full Name:
    Jeff B.
    #2 Miltonian, Nov 10, 2007
    Oil temp gauge problems are usually caused by a bad ground to the dry sump oil tank. The sending unit is right there towards the bottom of the tank. First check to make sure it is plugged in. Then run a supplemental ground wire from one of the bolts on the bottom of the tank to a good spot on the frame, and your gauge should start working again. Enjoy!
     
  3. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #3 Dice996C4S, Nov 10, 2007
    Thank you. Will try to do that....
     
  4. Mera

    Mera Formula Junior

    Aug 13, 2005
    768
    Milwaukee, WI
    Full Name:
    Rodney Dickman
    #4 Mera, Nov 11, 2007
    My oil temp gauge has not worked since I bought my 348 last winter. I have looked at this and was worried that if I took out one of those bolts I would start loosing oil from the bolt hole. So I have yet to do it. If you remove one of those bolts will you begin to loose oil? If the answer is no I will do it right away.

    Rodney Dickman
    1990 348 TS
     
  5. Dr_ferrari

    Dr_ferrari Formula 3
    Consultant Professional Ferrari Technician

    Nov 2, 2003
    1,073
    Pocono Sportscar
    Full Name:
    Jim McGee
    #5 Dr_ferrari, Nov 11, 2007
    The sensor as miltonian stated is on the bottom of the oil tank right next to the oil drain for the tank. most likely when they changed the oil the sensor wire was knocked off. Maybe it was loose already and they just finished the job.

    If that is plugged in ok check the ground wire for the tank. it is also at the bottom of the tank inboard next to the alternator. this goes also for the 348.

    a lot of time when the major is done, some forget to undo this connection and break the wire when the engine subframe is removed.

    good luck and best regards, Jim
     
  6. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #6 Dice996C4S, Nov 11, 2007
    Thank you for the ideas... Now, since I'm a noobie... I assume that I have to lift the car and remove the bottom plastic liners to reach the bottom of the oil tank, right ? Is there any other easy way ?
     
  7. TC (Houston)

    TC (Houston) Formula Junior

    Feb 5, 2002
    781
    Houston
    #7 TC (Houston), Nov 11, 2007
    If I were you, before I expended too much effort hunting around or troubleshooting, I would just swing by the shop and tell them that the gauge has not worked since you got the car back. When my 355 was last in to have the fluids changed and the radiators replaced, they neglected to reconnect the oil temp gauge.
     
  8. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #8 Dice996C4S, Nov 11, 2007
    +1.. I was going to go there tomorrow (Mon) but I was hoping I could get it done today so I don't have to stop by... Oh well....
     
  9. Mera

    Mera Formula Junior

    Aug 13, 2005
    768
    Milwaukee, WI
    Full Name:
    Rodney Dickman
    #9 Mera, Nov 12, 2007
    Just lay under the rear bumper and look up. It is right there.

    Rodney
    1990 348 TS
     
  10. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #10 Dice996C4S, Nov 12, 2007
    I have a F355. Is that the same as the 348 ? The one underneath the rear bumper is the gearbox, right ? The oil tank is on the right above the right rear well.
     
  11. Dice996C4S

    Dice996C4S Karting

    May 7, 2006
    147
    Cerritos, CA
    #11 Dice996C4S, Nov 12, 2007
    Problem solved. Took it back to the shop and the connector was not plugged in... Thanks guys...
     
  12. TC (Houston)

    TC (Houston) Formula Junior

    Feb 5, 2002
    781
    Houston
    #12 TC (Houston), Nov 12, 2007


    Great!
     

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