348 oil pressure sending unit | FerrariChat

348 oil pressure sending unit

Discussion in 'Technical Q&A' started by WJHMH, Jun 25, 2012.

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  1. WJHMH

    WJHMH Two Time F1 World Champ
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    Sep 5, 2001
    26,465
    Panther City, Texas
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    WJHMH
    I noticed the other night driving back from Dallas the oil pressure gauge fell to about a quarter & jumped back up to half to more than half. I suspect the sending unit is failing which a common issue with these cars. My question is the part only exclusive to Ferrari or can get a better & less expensive aftermarket replacent (Bosch, Sachs, etc..) without messing with the dreaded Ferrari tax?

    Thanks,

    Will
     
  2. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
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    The Bad Guy
    Almost nothing is exclusive when it comes to the electronics.

    Found the info you are looking for on page 321 of the 348 parts sticky:

     
    Alberto Ara likes this.
  3. WJHMH

    WJHMH Two Time F1 World Champ
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    WJHMH
    Excellent, thank you for the information.
     
  4. ernie

    ernie Two Time F1 World Champ
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    Nov 19, 2001
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    Glad to be of help William.

    and

    D'oh!

    That should have read "page #21" NOT "page 321". I didn't hit the shift key. duurrrrrrrr. :p
     
  5. WJHMH

    WJHMH Two Time F1 World Champ
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    I got it sorted out, turned out to be a bad connection.
     
  6. rallyone

    rallyone Rookie

    Jul 5, 2012
    3
    What is the psi of acold 348 ts
    and the same in hot temp?
     
  7. stevew3765

    stevew3765 Formula Junior

    Oct 27, 2012
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    Steve Wool
    Hi Ernie. You may or may not have seen my post titled. The dream is over in the 355 section. But, If I needed some heads and or valves and the like. Can you point me in the right direction for sourcing some. Thanks so much!
     
  8. yelcab

    yelcab F1 World Champ
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    Nov 29, 2001
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    Mitchell Le
    Bruce Plugzit is your man when it comes to valves, guides, and even heads for the 355. He even has a local machinist that will take up the challenge.
     
  9. stevew3765

    stevew3765 Formula Junior

    Oct 27, 2012
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    Tulsa, Oklahoma USA
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    Steve Wool
    Thanks so much. Just getting my ducks in a row...:>)
     
  10. JM280z

    JM280z Formula Junior

    Aug 22, 2020
    878
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    Jake
    Anyone have current links/part numbers for a 348 oil pressure sending unit?


    Sent from my iPhone using FerrariChat.com mobile app
     
  11. Qavion

    Qavion F1 World Champ
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  12. MLX_1

    MLX_1 Rookie

    Dec 27, 2021
    46
    London
    Does anyone have advice on how to remove the oil pressure sender of a 348 with the engine in situ? Is it even possible? I took the air box off today and could barely get my fingers to it, let alone disconnect the sender wires . Is there a clever technique to this?

    Any advice much appreciated!
     
  13. yelcab

    yelcab F1 World Champ
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    Nov 29, 2001
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    Mitchell Le
    What, you don't want to remove the engine for this small task?
     
  14. yelcab

    yelcab F1 World Champ
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    Nov 29, 2001
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    Mitchell Le
    Seriously, it is done without too much effort. Remove enough stuff over the engine to get a wrench in there.
     
  15. MLX_1

    MLX_1 Rookie

    Dec 27, 2021
    46
    London
    Hmmm - I get that. I was looking for a slightly more detailed answer if possible!
     
  16. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
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    Mike
    I had to remove some stuff to do a different job, but it will be the same procedure for this job....let me see if I did a thread on it with pics/instructions....stand by....
     
  17. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
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    Mike
    Ok, I looked up my thread. Unfortunately I didn't take any pictures, but this is what I did to access the temperature sensor sending unit. This is underneath the plenum, so a different location than your job, but you will still need to do at least some of this if not all, and likely a few more things:

    1) removed the air box in its entirety by loosening the large clamps near the MAFs and then the little clamps for the little hoses on the bottom furthest away from you when facing the firewall/front of the car. Also need to unplug whatever those things are (sensors I believe or sending units - not really sure) that plug into the MAFs

    2) I took the oil filter off

    3) I took the oil filter housing unit off, three nuts (13mm) in a triangle formation, the top of the triangle closest to the firewall/front of the car and the base of the triangle closest to the back of the car/tail-lights. This part was a little difficult because those three 13mm nuts were a son-of-a-***** to access, especially the one at the top of the triangle, you will need a universal joint. BE VERY CAREFUL REMOVING THE WASHERS on the studs for the oil housing unit so as not to drop them into any of the holes that the oil filter and oil filter housing unit leave...observe the picture with the oil filter and oil filter housing unit removed, and you will notice the triangle which I outlined in red...I also highlighted the studs where the 13mm nuts go, the bottom left one is hidden from the oil housing unit so I scribbled it in red also (can you tell I got an A++++ in art class :D)

    4) Once you have these out of the way, there is plenty of room to get your hand in there and wiggle it around...which is what I did, I simply kept moving my fingers around until I found a hole (that doesn't sound good :)) that had the male connector I was looking for...I pressed my finger against it as hard as I could for about 10 seconds to make an impression then quickly removed my finger and had a look....and voila, I found the perfect match for my loose plug (speaking of which, if anyone needs a date I think I found a new profession :D), and simply reached inside and plugged it back in and then covered it up with that red elbow boot/insulation/protector/whatever-the-hell-it's-called. Its location is on the left side of the intake manifold when facing the firewall, male end faces the firewall and the loose end in question plugs in facing the back of the car/tail-lights.

    Total time of the job was about an hour and a half - that does not include the time I spent looking for the plug the first time, and about 15 or 20 minutes was wasted with the oil-filter housing because of those 3 nuts that are very difficult to access.

    Again, with the airbox, oild filter, and oil filter housing out of the way it was VERY EASY to reach my hand in there and plug this back into its position. Unfortunately, I could not take pictures of the spot because of its location, but I think Hugh is right that it is # 45 in the diagram of post # 4 where this plugs in.
     
  18. MLX_1

    MLX_1 Rookie

    Dec 27, 2021
    46
    London
    That’s really helpful Mike, many thanks. Will try and follow your procedure next weekend.,,,, thanks again!
     
  19. AceMaster

    AceMaster Three Time F1 World Champ

    Feb 6, 2009
    34,777
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    Mike
    You are welcome, and good luck.

    If you are able, take pictures and make a stet-by-step of this procedure so we can it to the 348-DIY thread.
     

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