Sonata oil filter

Discussion in 'Hyundai Sonata' started by Tom, Aug 16, 2006.

  1. Tom

    Tom Guest

    I changed my oil in my 2006 Sonata and used a Bosch OEM filter I bought over
    the internet from a Hyundai dealer. It doesn't have the valve in the bottom
    of the filter like the Hyundai filter did that I removed. An earlier post
    said the valve kept the oil from draining out of the filter and causing loss
    of oil to valve train on startup. I'm confused by this explanation since
    the filter sits vertically on the engine and there is no way that the oil is
    going to drain out of it.
    The valve might be a bypass valve if the filter gets clogged, which is
    usually what is in some filters.
    Any comments?

    Tom
     
    Tom, Aug 16, 2006
    #1
  2. Tom

    Matt Whiting Guest

    It lets the oil "above" the filter in the engine passages drain back
    into the filter and crankcase. True, the filter likely don't drain, but
    it isn't impossible even with a vertical filter. You are familiar with
    the principle called siphoning, right?

    An anti-drainback valve is an essential part of a filter and I wouldn't
    use a filter that lacked one or had an ineffective one (Fram).

    Matt
     
    Matt Whiting, Aug 16, 2006
    #2
  3. Tom

    Tom Guest

    Yep, Matt, I thought about the siphoning action but doubt that it would be a
    problem. For years, as I said, the valve is a bypass valve, not an
    anti-siphon valve. I can see that, in cold weather when the oil is more
    viscous, the oil flow to the valve gallery would be reduced allowing the
    lifters to not pump up fast enough and cause some clacking. That would be
    more reasonable.
    The fact that the OEM Bosch filter doesn't have the valve (at least in a
    visible location) is puzzling. I will be writing to Bosch to let them know
    and get their input.

    Tom
     
    Tom, Aug 16, 2006
    #3
  4. Tom

    Tom Guest

    I just went on the Bosch site and they say that their Premium Filters have a
    silicone anti-drain back valve, so it must be in there somewhere. I just
    can't see it.

    Tom
     
    Tom, Aug 16, 2006
    #4
  5. Tom

    Tom Guest

    The mystery is solved! The key was 'silicone' valve. In my years working
    for packaging companies, we had silicone vacuum or pressure release silicone
    valves, which were nothing more than a little silicone flap that covered a
    hole.
    Well, I looked at my spare Bosch filters and, there it was, a silicone
    gasket that was just below the holes around the periphery of the filter.
    The oil is forced through these holes and, in the process, push the silicone
    gasket away from the hole. The oil goes through the filter and out the
    center hole back to the engine. When the oil tries to come back through the
    filter down the center hole when you shut off the engine, it pushes the
    silicone gasket against the holes and prevents reverse flow.

    Thanks for pushing me to a solution, Matt. I guess it's never too late to
    learn. :eek:)

    Tom
     
    Tom, Aug 16, 2006
    #5
  6. Tom

    Matt Whiting Guest

    I'm not sure I follow you. A good filter has both a bypass valve and an
    anti-drainback valve. They are different animals that serve different
    functions.


    Matt
     
    Matt Whiting, Aug 16, 2006
    #6
  7. Tom

    taters2 Guest

    Need a fuel pump, starter solinoid and a good master cylinder for my 1931 a
    ford also could use a radiator for my 1966 V.W. bug.
     
    taters2, Sep 13, 2006
    #7
  8. Tom

    Greg Guest

    A radiator for a '66 Bug? That must be a customized 1300 machine, 'cause
    all of mine were air cooled...the '59, 66, and 71SB...

    Can't help you with the Ford, but then again, it's a Ford.
     
    Greg, Sep 13, 2006
    #8
  9. Tom

    taters2 Guest

    Just Kidding!
     
    taters2, Sep 13, 2006
    #9
  10. Tom

    ']['unez Guest

    Taters, I have a BRAND NEW in the BOX radiator for your bug, also have BRAND
    heater core also, make me a DECENT offer for both.

    ']['unes
     
    ']['unez, Sep 13, 2006
    #10
  11. Tom

    Greg Guest

    I knew that. If I thought you were serious, I would have tried to sell
    you some!

    Crap - it looks like ']['unez beat me to it...
     
    Greg, Sep 14, 2006
    #11
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