Burnt valve - what to do

Discussion in 'General Motoring' started by arabellafigg, Mar 30, 2007.

  1. arabellafigg

    arabellafigg Guest

    I have a 2002 SL1 that has had regular maintenance since I bought it
    used in 2004. Recently I went about 1500 miles over the 3000 limit
    between "checkups" and brought it in. No oil changes etc. since the
    last inspection. It had started "hesitating" a bit during
    acceleration so they checked that. The Saturn people tell me they got
    only a quart of oil when they drained it for oil change, no leaks
    found, timing chain is rattling. They think it has a burnt valve, and
    that my best option is to replace the engine which will cost about
    $2900.

    I've opted to think about what I'm going to do. They tell me I will
    probably have to keep oil in the trunk and check it often and make
    sure to top it up and that eventually it will stop running and I'll
    have to get it towed in for the repair.

    Given that I take the bus to and from work every day and put very few
    miles on it otherwise (a tank of gas lasts me over a month) I'd like
    some realistic views on what I should do at this point. The
    hesitation is still very slight but of course it's there. I can
    realistically keep putting oil in it, no problem there. But I want
    good solid advice on what will most likely happen, worst case and best
    case. Also, what exactly does a "burnt valve" mean? I'm a computer
    geek, not an engine geek. Pointers to graphics and descriptions on the
    web so I can know what the problem is would be great. Also I
    recognize this may very well be my fault due to neglecting to check
    the oil--but should it be this bad just due to that?

    Thanks for your input.
     
    arabellafigg, Mar 30, 2007
    #1
  2. arabellafigg

    Steve B. Guest


    If it were mine I would just continue to drive it. Maybe it will
    eventually croak but every car out there is eventually going to croak.
    If it dies the worst thing that is going to happen is that you have to
    have a tow and a new engine instead of just a new engine.

    It would be wise to ask around and find a good independent mechanic
    and get a second opinion. If it just needs a new timing chain have
    that replaced and don't worry about it. If it really does have a
    burned valve then (a good mechanic can tell very easily) then I would
    drive it until it got to be an issue then decide what to do. Putting
    a 3k new engine in a car that is probably worth around 4k probably
    isn't the best thing to do.

    Steve B.
     
    Steve B., Mar 30, 2007
    #2
  3. arabellafigg

    SnoMan Guest


    I would atleast replace timing chain because when that fails it will
    damage engine big time because it is a interferance motor. Saturns
    tend to use oil especail if you sue 5w30 in a older one. Right now you
    are maybe looking as a new chain and maybe a valve job at most and it
    will run for a long time if you keep oil in it. If you cannot
    regulalry check your own oil, you realy do not want a Saturn because
    more often than not the use oil as they age and if you run it 3 to 5K
    miles between changes without checking it you could run it dry. .
     
    SnoMan, Mar 30, 2007
    #3
  4. Er, with 1.9L, or probably any other vehicle, it's best to check oil every
    time you gas up or before you get going for the day (better - no oil thrown
    up). You'll destroy your engine if you are too low and it only takes a few
    seconds to correct this.

    A week after I got my saturn i noticed that it was harder than normal
    starting, and ran very loud. I checked the oil and found it to be just at
    the bottom of the dipstick. I promptly added oil and changed it later that
    day (I'm just like that with oil, probably not nessisary.)

    Best of luck!
     
    HyperCube33 \(Life2Death\), Mar 30, 2007
    #4
  5. arabellafigg

    Oppie Guest

    Depends on what the value of dependable transportation is worth to you.

    If it were me, I would have the engine assessed for bearing knocks and
    compression. If the basic block is good, then by all means consider changing
    the timing chain and having the head rebuilt. If the engine is bad, and the
    car is otherwise good, consider a junkyard engine as a swap when the
    original finally goes.

    I have a LW300 that burns a quart every 1500 miles or so. More in the winter
    when I use 5W30, less in the summer when 10W30 is used. I check the oil at
    least once a week and keep a couple of quarts wedged into the corners of the
    engine compartment.

    Oppie
     
    Oppie, Mar 30, 2007
    #5
  6. Wow, I thought I was the only one who kept bottles of oil under the hood.
    :)

    Call me paranoid, but I check the oil in my Saturn almost every day.

    -David
     
    David Teichholtz, Mar 31, 2007
    #6
  7. arabellafigg

    Private Guest


    Checking engine oil regularly is not paranoid, it is merely good practice
    and proper operation. Checking fluid levels and tire air pressure are by
    far the most effective ways to minimize automotive expenses.

    IMHO, it is quite humorous that anyone can drive 50% past their 'checkup'
    and still be surprised they are seriously low on oil, or that this kind of
    mechanical abuse constitutes 'regular maintenance'. In this situation the
    failure to properly monitor the fluid levels may have caused serious damage.
    I have never needed to replace a worn dipstick or seen a mechanical
    breakdown caused by too frequent checking of fluid levels.

    IMHO, it would be a waste of time to give mechanical repair advice to anyone
    whose operation is so negligent, but otherwise would suggest performing a
    cylinder leakdown check to verify the valve condition and to also check
    spark plugs and plug wires, which are the most likely cause of 'hesitating a
    bit during acceleration'. YMMV.
     
    Private, Mar 31, 2007
    #7
  8. arabellafigg

    David Guest

    Oppie,

    Of interest is my daughter's 2000 Saturn LS2 V6. It has over 175,000km on
    it (about 107,000 miles) and it has never had oil added between changes,
    which are every 5,000 km (or3,000 miles). The dipstick is usually at the
    full mark when we change the oil. All of our chevy V6's are similar, they
    don't use any oil. (That's one reason why we like them!)

    Good luck,
    David
     
    David, Mar 31, 2007
    #8
  9. arabellafigg

    Oppie Guest

    David - Which engine is in the LS2 V6? The LW300 uses the L-81 engine that
    was designed by Opel in Germany. I understand that it was also used in the
    Cadillac Cattera.
    I occasionally use a 5 minute flush to clean out the block. Oil consumption
    has been about steady in the 60K miles that I have had the car. I don't
    believe it to be excessive consumption and just be careful to check it now
    and then.

    Interesting that this NG has posted much information of oil consumption of
    the vehicles. Given that there are level indicators for most of the fluids,
    why is there no level indicator for the oil. And don't even get me going on
    why there is no dipstick or level indicator for the ATF.

    Oppie
     
    Oppie, Apr 1, 2007
    #9
  10. arabellafigg

    Kevin Guest

    are you talking automatic level indicators like Porsche has?

    My '95, '96, and '97 manual trans Saturns all have dipsticks for the
    trans. I'm 95% sure the '95, '99 & '02 automatics in the rest of the
    family have them as well.
     
    Kevin, Apr 1, 2007
    #10
  11. arabellafigg

    Oppie Guest

    I am not familiar with any of the Porsche systems. Do they have an indicator
    for oil level (in addition to oil pressure)? Nice idea.
    Sensors and indicators do occasionally jam or fail giving a false negative
    so there is no substitute for doing a physical check once in a while.

    Checking ATF level in the L series was not anticipated as a need I guess...
    Since there is no dipstick and you can hardly even get to the ATF fill cap,
    It is pretty difficult. You have to jack up the car and keep it level while
    pulling a plug on the side of the transaxle. If it pisses fluid on you,
    level is good.

    Just another case of why design engineers should be made to intern as
    technicians for at least a year before they are allowed anywhere near a new
    design.

    Just my $0.02 worth - Oppie
     
    Oppie, Apr 2, 2007
    #11
  12. arabellafigg

    BläBlä Guest

    My 92 Bonneville had an oil level indicator on the oil pan. Also coolant
    level indicator on radiator, A washer fluid level indicator, and a brake
    fluid level indicator... It also could tell you when any exterior light
    bulb was out. Yeah that was back in 1992. I hope Porsche feels less
    special now. ;)
    Absolutely correct.
    There is no substitute for visual inspections. Of course there are
    people who wont stop driving even when every idiot light on the dash is
    lit up.
     
    BläBlä, Apr 3, 2007
    #12
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.