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Smoking Lexus RX300

6 messages,  Last post on Jan 21, 2008 at 8:19 AM

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#1 of 6 Smoking Lexus RX300 by wmcsllc Nov 15, 2007 (12:14 pm)
I have a '99 RX300 that will emit heavy smoke occasionally when it is first started after setting a while. The smoke looks like oil smoke, but it has a stronge chemical ordor. The valve covers have been removed and very little sludge was found. Two very capable mechanics are at a loss as to what is the cause. THe mileage is 130K and the timing belt,& water pump have been replaced. Has anyone had this experience? Replies to this message: amy1272hou (Dec 18, 2007 5:39 pm) la4mead (Jan 18, 2008 11:52 pm) wmcsllc (Jan 21, 2008 8:19 am) scwmcan (Jan 19, 2008 8:41 am)
#2 of 6 Re: Smoking Lexus RX300 [wmcsllc] by amy1272hou Dec 18, 2007 (5:39 pm)
Replying to: wmcsllc (Nov 15, 2007 12:14 pm) Happened to us too! The car had a small amount of smoke coming out of the exhaust. We loaned our Lexus to my sister while she was here in Vegas for three days. In three days it went from SMALL amount of smoke to a blown engine and $8200.00 in repair needed to replace the whole motor. As we had already replaced the transmission 1 1/2 yrs ago... we sold that heap to a salvage yard.   We did get a great price as all of the body, glass, and interior were in excellent shape.   PS - this oil sludge / motor seizing is becoming a widespread problem just like the transmission failures.
#3 of 6 Re: Smoking Lexus RX300 [wmcsllc] by la4mead Jan 18, 2008 (11:52 pm)
Replying to: wmcsllc (Nov 15, 2007 12:14 pm) WMCSLIC, Did you ever figure out what this was? Did it get any worse? Replies to this message: wmcsllc (Jan 21, 2008 8:19 am)
#4 of 6 Re: Smoking Lexus RX300 [wmcsllc] by scwmcan Jan 19, 2008 (8:41 am)
Replying to: wmcsllc (Nov 15, 2007 12:14 pm) I've seen this in some older cars and it is usualyy oil leaking past the valve seals when the car is sitting, if this is the case it probably isn't a big deal cars with this problem used to go a long time like this. Of course modern cars being what they are it could cause a fault in a sensor. I would think as long as you changed the oil regualarly that there really shouldn't be a major problem with the engine, of course I am not familiar with the symptoms of the reported engine problems either. Hope you have gotten the problem diagnosed correctly. Scott
#5 of 6 Reply by wmcsllc Jan 21, 2008 (8:10 am)
Thanks for the input.
#6 of 6 Re: Smoking Lexus RX300 [la4mead] by wmcsllc Jan 21, 2008 (8:19 am)
Replying to: la4mead (Jan 18, 2008 11:52 pm) I'm fairly sure its caused by leaking valve stem seals, however, I'm told that the heads must be removed to replace these seals.

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