456M Slight Oil Leak from Reservoir Hose Fitting by Radiator | FerrariChat
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456M Slight Oil Leak from Reservoir Hose Fitting by Radiator

Discussion in '456/550/575' started by pchop, Jul 6, 2023.

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  1. pchop

    pchop F1 Rookie
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    #1 pchop, Jul 6, 2023
    I noticed a small oil leak at the connection of the reservoir hose (part 180814) and the radiator. Pic shows the amount of seepage every 24 hours. I already tried to tighten the fitting and it's torqued properly. Do I need to order a new hose, try a high temp thread sealant or wrap an oil absorbent cloth around the fitting and deal with it at the next oil change? TIA!

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  2. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #2 Rifledriver, Jul 6, 2023
    Why thread sealant? The threads play no part in sealing.
    It needs to be removed and inspected. It might have slight damage on the sealing surfaces or a piece of debris on the sealing surfaces. Just loosening it enough to move the pipe up and down some then retightening it may work.

    I have had many that required slight lapping of the fitting to get it to seal.
     
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  3. pchop

    pchop F1 Rookie
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    #3 pchop, Jul 6, 2023
    I was taught it's a good idea to use some Permatex on drain plugs after each fluid change...in case the threads don't make a perfect seal.

    Thank you! I will give it a try at the next oil change.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #4 Rifledriver, Jul 6, 2023
    That was bad advice.
     
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  5. Jaredsalinsky

    Jaredsalinsky Formula Junior

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    #5 Jaredsalinsky, Jul 8, 2023
    How many times have you wiped it and watched it re-accumulate? Do the drops ever hit the floor? Reason I’m asking - is it possible it’s old oil from above (from a previous oil change etc) that made its way down? Seems a little odd it would just start leaking out of nowhere… but it does happen.
    I occasionally see seepage on some of my cars but the drops never make it to the floor.
    I’ve heard of the ‘gasket maker’ / thread sealant trick too… but that was for older vehicles whose engines are extremely scarce and options for new parts/hoses etc are difficult to source. I had an old landcruiser whose oil drain plug/bolt I frequently had to use gasket maker; the crush washer just wouldn’t seal correctly after all the times it had been accessed
     
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  6. pchop

    pchop F1 Rookie
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    #6 pchop, Jul 8, 2023
    It’s seeping from the connection fitting. I wiped the area clean and the next day you can see a drop forming. The area above is clean.
     
  7. Jaredsalinsky

    Jaredsalinsky Formula Junior

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    #7 Jaredsalinsky, Jul 8, 2023
    Is there an O-ring in that fitting? Might just have to open it up…
     
  8. pchop

    pchop F1 Rookie
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    #8 pchop, Jul 8, 2023
    haven't opened it up but i don't think it has an o-ring in this fitting...it's metal to metal.
     
  9. scowman

    scowman F1 Rookie

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    #9 scowman, Jul 8, 2023
    No.
     
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