1998 550 Maranello "sorting" thread--DIY | Page 28 | FerrariChat
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1998 550 Maranello "sorting" thread--DIY

Discussion in '456/550/575' started by moorfan, Aug 15, 2011.

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  1. gsjohnson

    gsjohnson Formula 3

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    #676 gsjohnson, Apr 4, 2015
    Ricambi states that these tensioner bearings are SKF sourced from Hill Engineering.
    Ferrari Parts : 171057 ROLLER BEARING : Ricambi America
     
  2. Cribbj

    Cribbj Formula 3
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    #677 Cribbj, Apr 4, 2015
    Last edited by a moderator: Sep 7, 2017
    GS, sorry I'm not following you? Those are the main air filters, which aren't really involved in the blowby system. Very cool looking plenum on that 575 GTC tho'!

    The key to the 550's blowby system is its air/oil separator, which is simply a semi-baffled small tank located on the radiator in the coolest area that Ferrari could find. (Item 5 in the pic below) Lots of surface area so the incoming oil laden mist from the dry sump tank could impinge on the inner surface and "hopefully" the oil would condense out and drain back to the crankcase. That's the theory anyway, but in practice it doesn't seem to work very well, since most of us still wind up with oil in our plenums.

    I suspect our problems are twofold: 1) Some of us are probably overfilling the tank, and 2) the air/oil separator really doesn't work that well.

    I've been fooling around with a completely different design for the air/oil separator, since we have similar issues with oil/gas separation in the petroleum industry. One of these days when I get my engine put back together, we'll see if it works. It's loosely based on a conventional process separator, but with a few more twists and turns :)
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  3. ferraridriver

    ferraridriver F1 Rookie

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    #678 ferraridriver, Apr 4, 2015
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  4. moorfan

    moorfan Formula Junior

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    #679 moorfan, Apr 4, 2015
    Last edited by a moderator: Sep 7, 2017
    Just south of 4 years ago Sark, and indeed, four of my injectors were dripping and flowing 25cc/min less than standard.
    I think it should be done every "major".

    Reinstalling injectors after returning from RC (Photo 1)

    John, you asked about the valve at the back of the plenum, here is one of the new ones (Photo 2)
    I will be replacing #8 in your diagram, as well as cleaning out that air/oil separator as best I can. I don't think the amount of oil in my plenum was excessive, in fact, when you think about it maybe a thin film is good in picking up particulates that bypass the air filters before they enter the intakes. Just a thought.
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  5. moorfan

    moorfan Formula Junior

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    #680 moorfan, Apr 4, 2015
    Last edited by a moderator: Sep 7, 2017
    The yearly gearbox service:
    Draining the casing by removing the 10mm hex drain bolt (Photo 1)

    The magnetic drain bolt shows very little sediment, as it always has. Must be my limp wristed shifting technique :) (Photo 2)

    Gearbox filter is also clean (Photo 3)

    This time I removed both lines to the cooler and let them drain for a half hour or so, rather than undoing one and trying to blow compressed air up through the cooler. Seemed to drain quite well with time.
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  6. fatbillybob

    fatbillybob Two Time F1 World Champ
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    #681 fatbillybob, Apr 4, 2015
    I came to that conclusion many years ago working on 90's BMW's. I noticed how the idle smoothed out and smog numbers improved.
     
  7. Cribbj

    Cribbj Formula 3
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    #682 Cribbj, Apr 4, 2015
    Pete, thanks for that pic, and I see that Ricambi does refer to those as a non-return valve. I need to dig mine out and look at them closer as I was sure they were just a barbed fitting.

    Much nicer than that :)
     
  8. gsjohnson

    gsjohnson Formula 3

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    #683 gsjohnson, Apr 5, 2015
    Last edited by a moderator: Sep 7, 2017
    John-Yes in a sense you are correct. But note that these filters are located inside the plenum rather than the exterior filtration system. They are also carbon indicating to me that they absorb, at the minimum, oil and gas fumes...
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  9. moorfan

    moorfan Formula Junior

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    #684 moorfan, Apr 5, 2015
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  10. moorfan

    moorfan Formula Junior

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    #685 moorfan, Apr 5, 2015
    Last edited by a moderator: Sep 7, 2017
    At this point I removed the torsion damper. I looked very carefully at the damper for signs of "wear" that would indicate a need to rebuild it, but don't see any. It looks the same as before. (Photos 1 and 2) I also realize I don't know what those signs would be. Experts? :)
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  11. moorfan

    moorfan Formula Junior

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    #686 moorfan, Apr 5, 2015
    Last edited by a moderator: Sep 7, 2017
    Once the damper is off you can clearly see the extent of leak from my front crank seal. (Photo 1) I still cannot tell if there are any problems with the timing gear bearings. I won't know that until I have the front cover off and remove those lower timing cogs to see. There is very little clearance between the front cover and those cogs.

    Water pump removed. Impeller looks okay. It will be fully rebuilt though. (Photo 2)
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  12. ferraridriver

    ferraridriver F1 Rookie

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    #687 ferraridriver, Apr 5, 2015
    Philistine
     
  13. Cribbj

    Cribbj Formula 3
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    #688 Cribbj, Apr 5, 2015
    Last edited by a moderator: Sep 7, 2017
    No expert here, Pete, but these folks are: new*home*page*H.B.

    Mine looked like yours before I sent it to Dale, and here are some pics of it after below. Mine cost a bit more than their customary price, but that's because they sent the core pieces to a plater for me, once they were disassembled, so it was an extra step or two.

    Au contraire, wait'll you see my little beauty; your copper scouring pads will be relegated to beneath the sink, where they belong :)
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  14. tazandjan

    tazandjan Three Time F1 World Champ
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    #689 tazandjan, Apr 5, 2015
    Pete- Did you upgrade your water pump to 575 standards last time?
     
  15. fatbillybob

    fatbillybob Two Time F1 World Champ
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    #690 fatbillybob, Apr 5, 2015
    Last edited by a moderator: Sep 7, 2017
    Pete,

    I do not see the locking washer on the WP impeller. The ones I have seen wrap on 2 sides of the hex capnut. You should buy a washer with at least one tab to bend over one of the hexes.
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  16. gsjohnson

    gsjohnson Formula 3

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    #691 gsjohnson, Apr 5, 2015
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  17. dersark_painclinic

    dersark_painclinic Formula Junior

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    #692 dersark_painclinic, Apr 5, 2015
    FBB, I do not remember seeing that kind of washer when I rebuild the pump.
     
  18. tazandjan

    tazandjan Three Time F1 World Champ
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    #693 tazandjan, Apr 5, 2015
    FBB- I do not see that kind of washer in the 575M WSM or the 550 or 575 parts catalogs. Seems like that would imbalance the impeller.
     
  19. fatbillybob

    fatbillybob Two Time F1 World Champ
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    #694 fatbillybob, Apr 6, 2015
    Interesting...i have rebuilt 4 or 5 of these pumps and I have always seen that washer. I assumed it was OEM. Imbalance in probably not an issue so close to the axis of rotation and the pump does not turn that fast. Oh also see this washer on the 355 pump which are similar or the same even with the 2 different impellers.
     
  20. tazandjan

    tazandjan Three Time F1 World Champ
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    #695 tazandjan, Apr 6, 2015
    FBB- They were always making changes, so who knows? I do not see it in the 2.7 or 5.2 F355 parts catalogs, either.
     
  21. moorfan

    moorfan Formula Junior

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    #696 moorfan, Apr 6, 2015
    Terry,
    how does one rebuild a 550 pump to 575 standards? What's different? I simply ordered a Ricambi rebuild kit last time.
    Hmmmm..... :)
     
  22. tazandjan

    tazandjan Three Time F1 World Champ
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    #697 tazandjan, Apr 6, 2015
    Pete- Better impeller and smaller pulley for more flow. John has done, or will do, that to his 550, even though she is not running. The 575M shroud is much improved, too.
     
  23. moorfan

    moorfan Formula Junior

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    #698 moorfan, Apr 6, 2015
    So looking at Ricambi's site it looks like the impeller you speak of has deeper vanes on it...will this still fit into the orifice of the otherwise "550" water pump recess?

    And then, the issue is why fix something in my car that isn't broken? My cooling system always seems to run impeccably well.
     
  24. moorfan

    moorfan Formula Junior

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    #699 moorfan, Apr 6, 2015
    Terry: I went back to the beginning of my own thread and reread John's information that he kindly posted here on this new impeller. I will ask him if the newer impeller actually worked out.
     
  25. gsjohnson

    gsjohnson Formula 3

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    #700 gsjohnson, Apr 6, 2015
    Pete-I went with the original impellor and pulley during my rebuild. I was worried about cavitation with the pulley size change. John stated that he didn't notice a difference when we spoke about it. I'd go with the 575 shroud upgrade if you were experiencing any run hot issues.
     
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