Question about 1998 Buick Century

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Running I have a 98 Century Limited. I believe it has a 3. (something engine). About a month ago I started smelling antifreeze. Could not find a leak. Then the car started running rough and acting like it wanted to stall (not all the time, if it sat it would not do it). A week later it started running hot (still cant find a leak). We have changed the fuel filter, plugs, wires, thermostat. Any suggestions would be appreciated. We have a Corisca with the same motor and it did the same thing (except the antifreeze smell) We have put hundreds of dollars into it and it is still not fixed. PLEASE HELP I AM DESPERATE !!!!!

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  • vicki2673 May 21, 2009

    have a 98 Century Limited. I believe it has a 3. (something engine). About a month ago I started smelling antifreeze. Could not find a leak. Then the car started running rough and acting like it wanted to stall (not all the time, if it sat it would not do it). A week later it started running hot (still cant find a leak). We have changed the fuel filter, plugs, wires, thermostat. Any suggestions would be appreciated. We have a Corisca with the same motor and it did the same thing (except the antifreeze smell) We have put hundreds of dollars into it and it is still not fixed. PLEASE HELP I AM DESPERATE !!!!!

  • vicki2673 May 21, 2009

    No to the white smoke. The tempature guage was going to the H, but we changed the theromastat so it hasnt went that high, I still think it is running a little hot but my husband says it is because it is hot outside.

  • vicki2673 May 21, 2009

    My mistake. I just asked my husband and he said yes there is white smoke from the exhaust. What does that mean?

  • Greg Margossian
    Greg Margossian May 11, 2010

    Are you getting white smoke from the exhaust? This would account for you not finding the leak because the antifreeze is burning off in the exhaust. Also, is the car over heating?

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White smoke from the exhaust is a good indication that you have a blown head gasket. One test would be to run the motor and check the oil. If the oil appears frothy like a milkshake, it's very likely the head gasket is blown and as keith stated about water is seeping into the oil. Sorry to be the bearer of bad news. Best of luck to you.
Greg

Posted on May 21, 2009

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Have you checked your oil to see if there is antifreeze/water in the oil?  With the fact that it is running rough makes me think that you might have a head gasket leak and your coolant is running into your oil (and this would explain why you can't find a leak).  I would start with checking the oil to see if water is beading up in it.  Hope this helps and let me know if you have other questions.  Thanks for an honest rating and for using FixYa.

Posted on May 21, 2009

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