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#1
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E320 smoke on start up
1998 one owner with 55K miles and all records when I bought it 6 months ago. I've only put 3k miles on it due to weather. Car starts and runs fine but has put out a sizeable amont of smoke, on cold start, the last two times I've started it. Car never smoked before.
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#2
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First, make sure it's not just steam from the cold weather. Cold starts in our recent weather put out a white cloud that is more noticable than any other time.
If it's not steam, it sounds like bad valve stem seals, though this isn't a systematic problem for this engine. If the valve stem seals are bad, you should also experience a puff of smoke when taking off after a red light.
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95 E320 Cabriolet, 159K |
#3
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This was a healthy cloud that hung in the garage and smelt of petroleum. Don't valve guide seals fail gradually over time/mileage?
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#4
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Sure they do, but 55K is rather early, unless you're driving a 3.0L Misubishi engine, like I had in my LeBaron!
One other thought is that your transmission modulator may have a leaky diaphragm. It's an easy check - disconnect the vacuum line at the modulator and see if it's wet with transmission fluid on the inside.
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95 E320 Cabriolet, 159K |
#5
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Since this just started all at once and the amount of smoke is cosiderable, I think the modulator is more likely the cause than the seals.
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#6
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What color is the smoke? Valve stem seals leave a dark blue cloud because oil is buring off. If it is valve stem seals it should do it on almost every start up where the car has been sitting for a few hours.
If it smells like gas I can't help you I am not sure what would cause that. Maye sitting for a long time?
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1999 SL500 1969 280SE 2023 Ram 1500 2007 Tiara 3200 |
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