Question about 2000 Lexus RX 300

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I have a lot of white smoke from my 2000 RX 300 when I start it up. More when it's been sitting for a long time, like over night and in the morning, or after work. Is this engine sludge problems??

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This is usually caused by worn valve guides. Do you have a lot of mileage? More than 150K? This condition is not a problem for the engine (though it might be embarrasing) as long as the oil doesn't foul the plugs. If you plan to make this car last a lot longer, it may be a good time to rebuild the engine or at least the heads.

Posted on Sep 27, 2010

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How much should my Ford ranger 2.5td be smoking,is it normal for diesel engens to smoke.


Sometimes diesel engines will put out black smoke under extreme acceleration. Other than that, they shouldn't smoke. Black is excess fuel, White smoke is water and bluish is oil. White smoke on a cool morning is not necessarily a sign of a problem unless it happens every time you start it through a warm day. Hope this helps.

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This problem is common but often over looked. Moisture vapor is a grayish white color but it dissipates very quickly. Smoke that is grayish white is caused specifically from burning oil. The problem you have is a small seal called a valve seal. It is very common in cars that sit a fair amount of the time. The seal gradually starts to leak and allow tiny drops of oil to drip into the combustion chamber. When the engine is started then it smokes until the oil is burned. Due to the amount of time that your car smokes after start tells me that the leak is very small. That is why there is no oil consumption. This is not going to harm the car unless it becomes very bad and then the only thing that would happen is more smoke and fouled plugs. You can start using a heavier weight oil and add an oil treatment to the oil when you have it changed. This may evin stop it all together. Hope this answered your question. Please rate this solution if you think it has helped. Good luck and thanks cj2176.

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Honda Accord 1994 V4 LX: Starting problems in the morning


There could be a few things causing this. When the car finally starts, is there any smoke coming out the exhaust pipe? White smoke would mean your headgasket is leaking and is letting coolant into the engine, then it is burned along with the fuel. Does the car run hot? Meaning has it ever overheated? Back to the smoke, if its black, your oil is getting in and is burning.

Now, the reason why it would be hard for a car to start, could be, a leaking headgasket, flooding the car while the car is sitting.

And yes, the car would be able to crank, but just wont start, for a while...because it has to get rid of all that fluid that has leaked into the engine while sitting at night.

Another thing you could look at, is your fuel pump, is it supplying a sufficient amount of pressure? If it isnt, it will take a while for it to pressurize and deliver fuel into the engine. You can check the fuel pump yourself by renting a fuel pump pressure tool from stores like autozone, kragen and more.

Your gas cap on tightly?

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1 Answer

Pathfinder


Hi Pathman,

I was going over unsolved problems and found yours.

After a cool night, condensation forms on the cool metal. The white smoke is that condensation burning off. If it did not stop, that would be indicative of a worse problem.

Mike

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