Skip the auto shop - Our mechanics make house calls

Q: Bluish exhaust smoke upon startup

asked by on

My car has gone 130,000 miles. The car runs well. However, it makes white to bluish-colored smoke each time I start it. It comes from the exhaust in huge amounts. I had the oil checked and it is at an appropriate level. What might cause the smoke?

A: With higher mileage like your vehicle has, ...

With higher mileage like your vehicle has, the exhaust valve stem seals wear, allowing a tiny amount of oil to seep onto the exhaust valve while the car is sitting. When you start it up, this oil is burned up (clogging the catalytic converter as well), and causing the blue smoke you see briefly. If you would like to have this looked at, a certified technician from YourMechanic can come to your car's location to diagnose the smoke problem and figure out what fixes are appropriate.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Whining from tensioner or AC compressor

Hi there, if the problem only occurs when the engine is cold then it is most likely the tensioner or something to do with the timing chain. The A/C compressor would create the noise when the A/C is turned on,...

Q: Burning smell when constantly doing maneuvers - 2003 Vauxhall Corsa

Hello there. Unfortunately, we don't typically work on Vauxhall Corsas here in the U.S., but there are a few items that could cause a burning smell including a leaking engine or transmission oil, a "petrol" leak under the hood (as...

Q: Car cuts off while driving after sitting for a few hours cuts back on check engine light comes on but does not stay on

Hello there, faults such as this can be a bit difficult to diagnose. When the cars cut off like this but then starts fine when they cool off, it points to a part that is failing once it gets hot...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...