Oil in Exhaust - Hyu Excel 1991

Discussion in 'General Motoring' started by GK, May 9, 2006.

  1. GK

    GK Guest

    I have oil fumes coming out of the exhaust. Some time back I replaced
    the rear main seal (not connected with fumes I suppose) and spent quite
    a bit of money on that. My mechanic tells me its better to replace the
    engine than to overhaul it (It has 97k miles on it). However, since I
    have spent quite a bit of money to get the rear main seal fixed, I
    would like to extend the life of this engine if possible. Can anyone
    offer me tips on what could be the problem here and whether its worth
    the cost?
    GK, May 9, 2006
  2. GK

    Jack Cassidy Guest

    My guess would be either bad valve guides/seals or a plugged up PVC valve.

    Jack Cassidy
    Jack Cassidy, May 9, 2006
  3. GK

    hyundaitech Guest

    It could also be poorly sealing piston rings (for one reason or another).
    Any way you look at it, it's not likely to be inexpensive unless it's pcv
    hyundaitech, May 9, 2006
  4. GK

    Mike Marlow Guest

    Unless it's something simple like a PCV, you're likely looking at more money
    to repair the engine than the car is worth. Sometimes it's better to cut
    your losses and move on.
    Mike Marlow, May 9, 2006
  5. GK

    Tom Guest

    Does it smoke out the exhaust when you take your foot off of the throttle
    (valve guide seals) or when you step on the gas (rings)?? Seals would not
    be so expensive as the rings.
    Tom, May 10, 2006
  6. Another sign of bad valve guide seals is that it smokes badly when you
    take off after idling, such as at stop lights.
    Brian Nystrom, May 10, 2006
  7. GK

    nothermark Guest

    Change the PC valve yourself. Autozone will show you where it is.

    If that doesn't do it you have to balance:
    1. The cost of a newer Hyundai
    2. The cost of just adding oil more frequently
    3. The cost of a new engine (don't buy a junker)
    4. Your loyalty to supporting your mechainc's boat payments.
    nothermark, May 10, 2006
  8. GK

    GK Guest

    Thank you all for your posts. The car fumes the most just after
    starting. I see a lot of smoke smoke during idling and some when I step
    on the gas.
    GK, May 11, 2006
  9. Sounds like valve guide seals to me.
    Brian Nystrom, May 11, 2006
  10. GK

    Tom Guest

    What does the oil look like on the dipstick after running the engine? Clear
    or foamy?
    Tom, May 13, 2006
  11. GK

    Mike Marlow Guest

    It should never be foamy. Water in the oil. Time for a visit to your
    friendly mechanic.
    Mike Marlow, May 13, 2006
  12. In a '91 Hyundai, I would agree. And foamy, yes.

    But people shouldn't mistake some white, especially on their oil cap, for
    foamy. This is oxidation in the oil

    Every car I have ever owned that did not have a PCV valve would do this, and
    usually within about 2500 miles or so. If you have a car doing that, I
    learned that you just have to be content to change the oil more often. It
    seemed worse in Winter in those cars, for some reason. And even using
    synthetic oil, it would do the same thing. You just had to keep the oil
    meticulously changed and it worked out fine.

    In fact, each of those three engines (including one Korean engine) ran great
    and trouble-free, and even when I had to get rid of those cars (with over
    200,000 miles on them each) it was not because of a problem with the engine.

    Tom Wenndt
    Rev. Tom Wenndt, May 13, 2006
  13. GK

    Matt Whiting Guest

    I was always told it was an emulsion of the oil with condensation. That
    is why it tends to collect in the parts of the engine that are coolest,
    like the underside of the filler cap and the inside of the valve covers.

    I believe that is because there is much more condensation in winter as
    the engine often isn't run long enough to get it hot enough to
    thoroughly evaporate the condensation in the engine.

    Pretty amazing, eh? I've only had one car that I got rid of because of
    engine troubles in 30+ years of car ownership. That was a POS 84 Honda
    Accord that I purchased new, maintained meticulously (it was my first
    ever brand new car), used Mobil 1 and genuine Honda filters, etc., and
    the top end of the engine self-destructed at about 72,000 miles.

    Honda wouldn't stand behind it even on penny. They first accused me of
    not maintaining the car properly. I sent them more than 20 pages copied
    from my fuel purchase and maintenance log along with receipts for their
    GENUINE Honda oil filters and other parts. They replied back
    acknowledging that maintenance deficiencies didn't appear to be the
    issue after all, but then told me that the car was out of warranty (duh,
    I knew that) and they felt that 72,000 miles was within their "normal
    manufacturing tolerances" for engine life and therefore they were
    "unable" to "subsidize" my repair.

    That's OK. They saved $300-600, but have lost thousands since. The
    repair was around $600 and since the warranty had expired I didn't
    expect them to cover the full repair, but I thought they at least might
    throw in the parts which came to a little more than half of the bill.
    So, by saving $300 in 1984, they cost themselves the sale of at least
    the four new vehicles I've purchased since then. And, though I can't be
    sure, I think I've talked at least four other people out of buying a Honda.

    Matt Whiting, May 13, 2006
  14. GK

    GK Guest

    Sorry for the delayed reply. I did not have access to internet the past
    two weeks as I was traveling.

    The oil in the dipstick is clear. So I think I will go with changing
    the PCV valve first and see if the problem persists.
    GK, May 28, 2006
  15. GK

    Bob Bailin Guest

    If your Excel leaves others in a bluish-gray cloud of smoke after
    every stop light, or when you start it up in the morning, and people
    think you work for an extermination company, then it's a sign that
    the valve stem seals in the engine need to be replaced. This is
    a common problem with these engines, and the seals can be
    changed without removing the cylinder head by a competent
    mechanic for a few hundred $.

    Please note that if this has been going on for several weeks,
    there's an excellent chance that your catalytic converter will
    be toast, burned out, You'll notice it the next time the
    car fails your state emissions test with high NOx and passing
    (but not low) CO & HC.

    The EGR passage in the intake manifold will be clogged with
    carbon and should be cleaned out along with the EGR valve,
    but this won't be enough to fix the NOx problem.

    Bob Bailin, May 29, 2006
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