Question about Honda Prelude

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I have blue smoke coming out of exhaust. . everyone's telling the rings are going bad in the motor and I should get rid of it. Could it be from a clogged catalytic converter? The guy who works on car tried to "unclog" the junk in the catalytic converter, he did not replace it. Could there still be some residue in there that's causing the blue smoke? Yes , it eats oil, but it has since I bought it three years ago and the blue smoke has been happning since last fall but it's getting worse, also in the last month I smell excessive gas fumes (inside) the car when I'm driving it and more so right when I shut the car off. Help? my computer in the car isn't showing any codes. .. .it just flashes 'once'. HElp? any suggestions? Thanks D

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  • cmtlady222 Jun 21, 2009

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The blue smoke and oil consumption is because of the bad rings. They are allowing oil to get by into the cylinders and it's being burned with the gas. If you don't want to put the money into an engine rebuild, you can try one of the many additives available at auto parts stores that claim to help restore compression and reduce oil burning in worn or high-mileage engines.

Posted on Jun 20, 2009

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If the cat were cloged you would have performance loss but not smoke. Burning oil can be caused by a few different things. If the rings are going bad eventually you will need to rebuild the engine $$$. Oil may have contaminated the O2 sensors causing the car run rich = gas fumes.

Posted on Jun 20, 2009

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Have your mechanic check for the presence of crankcase pressure. Many Japanese models have a sealed crankcase that is vented only to the engine intake plenum through a small orifice at the throttle body. If the orifice clogs, it causes crankcase pressure to accumulate, causing oil leaks, and oil burning, as the oil is forced past rings, gaskets, seals, etc. if there's pressure, clearing the orifice shouldl fix it.

Posted on Jul 06, 2009

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Sorry D,

But the blue exhaust fumes are from oil burning...there MAY be unburnt oil in your cat. converter, but if you're eating oil it is passing by the rings and burning it...the prob will only get worse with time...depending on the condition of your car, you can have the engine rebuilt or just junk it...
however, if you just wanna keep the car running as long as possible (until you can afford a new one or rebuild your engine) there are products at your local auto parts store that can help slow the process...lucas oil products makes a good internal engine repair additive...make sure to change your oil BEFORE adding the product....if you havent changed your oil regularly, viscosity breaks down and makes your oil thin which helps it pass by the rings...if you decide to use the product first, I suggest using a straight 30W oil as it will have more viscosity...maybe look at an STP oil treatment...you cant really screw it up more than has already happened.

unfortunately, the only thing you will be doing is prolonging the inevitable result of a bottom end engine rebuild.

good luck

Posted on Jun 20, 2009

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