cat resting on small gromet !!! | FerrariChat

cat resting on small gromet !!!

Discussion in '348/355' started by CANDREAM, Oct 15, 2013.

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  1. CANDREAM

    CANDREAM Canada

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    Anyone noticed if their upper cat pipe (bypass), passenger side, sits on this grommet (circled in red)....there is not any on the other side !!

    When motor mounts go, does your engine gets lower vertically or only move horizontally around ? or both......
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    Last edited by a moderator: Sep 7, 2017
  2. tbakowsky

    tbakowsky F1 World Champ Consultant Professional Ferrari Technician

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    The engine will sink down when the mounts are shot. Looks like mounts are needed in your case here.
     
  3. CANDREAM

    CANDREAM Canada

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    Thanks for the input...is it possible to crack the headers ?

    ie: should i change mounts asap or can I drive around until winter storage ?

    also, how easy is it to change mounts....and best place to buy.....Ricambi ?

    Thanks
     
  4. AceMaster

    AceMaster Three Time F1 World Champ

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    Nice catch
     
  5. CANDREAM

    CANDREAM Canada

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    Thanks...only now what is the fix.....if the mounts....then that should be easy...assuming it is an easy replacement.

    Anyone can chime in on the mount replacement ?
     
  6. GerryD

    GerryD Formula 3

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    Bad mounts do lower the engine. If you have a manual shift then you will also notice that the shift rod will be touching or close to the cross member near it.
    BTW none of the engine should be in contact with the frame.
     
    Last edited: Oct 17, 2013
  7. vvassallo

    vvassallo F1 Veteran

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    Bad engine mounts are not common. See if you can loosen the cat attachment bolts and rotate the cat out of the way.
     
  8. CANDREAM

    CANDREAM Canada

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    I checked the bottom and all seems aligned and the cluth bottom perforated plate is flush with the cross chassis cross member. The shifter is slightly off center in the hole , but again tolerances are not this car's forte.

    I am not getting much vibration in the seat and shifting is smooth.

    Vvassallo, did you mean ..... Common..... I have seen a few threads about the mounts being a weak point on this model.

    Anyway to visibly see anything ? Maybe jack the motor slightly /any visible cracks .....
    Manual does not seem to have much details about the assembly either.

    How easy to swap these.... Any special pullers, jacking of engine .....anyone done this appreciate the input.
     
  9. vvassallo

    vvassallo F1 Veteran

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    There is alot of misinformation on these cars floating around on the internet and even here occasionally. Just make sure that the mounts are really failed since it is kind of a pain to replace them, although I think they can be done in the car.
     
  10. gothspeed

    gothspeed F1 World Champ

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    +1 ...... I have heard of mounts going bad with unshielded exhaust manifolds and running a 'rich condition'. The manifolds run hotter when 'rich' and radiate the crap out of the front engine mounts just below them.
    From the looks of that pic above, it could easily be a mis-aligned exhaust and/or mal-adjusted muffler mounts allowing the exhaust to hang low.
     
    Last edited: Oct 18, 2013
  11. CANDREAM

    CANDREAM Canada

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    Thanks I will try to realign..... Hope that is it....
     
  12. tbakowsky

    tbakowsky F1 World Champ Consultant Professional Ferrari Technician

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    The mounts are not hard to replace at all, and they do go bad. They are not expensive either.

    It won't really put too much stress on the manifolds themselves so that's not much of a worry. I would change them sooner then later.
     
  13. CANDREAM

    CANDREAM Canada

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    ok, so I took a closer look and everything seems very aligned....makes no sense why one side would have this while the other does not ?

    Any other 355 out there with this ?

    here is another picture of the location......

    Also, the bottom is perfectly aligned...the engine does not seem to have sagged or anything....hate to change the mounts for no reason.....

    Why only one side rubberized grommet and what is the purpose ????????
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    Last edited by a moderator: Sep 7, 2017
  14. mad dog

    mad dog Formula Junior

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    The mounts do go, indeed i had one last just a year recently. it does depend on how hard you drive I suppose. And thats one way of testing, do an aggresive start, if engine jumps about you know shot.

    They can of course be done with engine in. do in pairs front and rear. loosen both off as you will need to jack the engine up to get old ones out and it will stress the other side too much if not loosened.
    the rear gearbox mounts are the ones to look at here if ti has dropped at all. These are a little more difficult to get to as they have the cats right above them. The fronts have far more room. You may need to take cats off but usually you can get a spanner in there.
     
  15. mad dog

    mad dog Formula Junior

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    oh and I look to see if gone when on a ramp and jack each side for and aft up a bit to see how much and how easily they move.
    Id also be interested to know if anyone else has had recent replacements fail as I suspected a bad batch.
     
  16. lotusk

    lotusk Formula 3

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    I replaced all 4 mounts 2 years ago.

    2 years later and only about 2000 miles later the engine mounts were toast. Gearbox were perfect.

    I noticed a cluncking sound when changing gear.....the gear shaft banging on the xmember...also there was more vibration in my bum when idling!.

    I am running NAP exhaust manifolds....things get hot back there....the engine mounts can't take it I feel.

    Am changing back to oem headers which have been renovated with better metal by QV of london, uk.
     
  17. gothspeed

    gothspeed F1 World Champ

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    What kind of muffler are you running? That may affect the bypass position.
     
  18. CANDREAM

    CANDREAM Canada

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    capristo III with capristo valve....you think they sit lower than oems ?

    cannot see reason to change mounts....all look good and no engine movement at quick starts....hate to touch it if not sure.....

    anyone has the same grommet ?

    any clearance between it and the cat ?
     
  19. gothspeed

    gothspeed F1 World Champ

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    My 355 has that same grommet on the frame stud. A rough estimate on the clearance from checking with my finger, is about 3/16" to 1/4".
     
  20. CANDREAM

    CANDREAM Canada

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    Perfect thank you....I will check again on hoist in a few weeks....maybe it is a simple adjustment....or eventual mounts....thanks for confirming that there should be a clearance.....
     

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