Question about 2008 Chevrolet Impala

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There is excessive exhaust fumes (blue smoke) when ever my car is running and its not cold outside:( what could this be? am i going to need a whole new engine?

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  • SARA Sep 08, 2010

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How many miles are on the car, sounds like the rings are worn

Posted on Sep 08, 2010

  • SARA Sep 08, 2010

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1 Answer

Would a bad pvc valve cause a 2008 Ford Fusion to smoke when going up hill


not necessarily
the purpose of the PCV valve is to vent the compression gases that by pass the rings into the sump back through the inlet manifold and so have the fumes burnt before going out the exhaust pipe
There fore it stands to reason that if you have worn rings/ broken ring or cylinder scored then there will be excess compression gas to the sump which tends to boil off the oil or actually burn the oil fumes in the sump and this excessive smoke will find its way back into the inlet manifold and if too much ,out the exhaust as smoke
when going up a hill that amounts to extra compression being exerted on the rings and pistons and a larger part of the compression gas into the sump and out the rear as smoke
I suggest that you have a compression test done to gauge the condition of the engine, an oil pressure test done with a mechanical gauge to measure the oil pressure to determine the condition of the bearings as excessive bearing clearance will overload the weak oil rings and that will also cause smoke out the exhaust
you have not mentioned the mileage done by the motor but as it is 2008 model and calculating the average mileage covered for that year vehicle I am thinking that the motor may be a bit worn
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Cold weather right? Dripping is the water condensing from the exhaust gases. The "smoke" is more than likely water vapor, just like your breath in cold weather. If you have smoke (black) in warmer weather, you have an excess fuel problem and won't pass emmision tests. If blue smoke you have oil leaks into the coubustion chamber. Also will not pass emmisions test.

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Engine smoking on start up not using any oil


Hi, you do not give a great deal of info about your car, but I will assume that it has done50K miles and is 5 years old.
All combustion engines produce CO2 and Water as part of the Carbon cycle, to produce energy. The same as when you breath out.
When the car is cold ("at start up") this water will show as steam in the exhaust fumes until the exhaust pipe has heated up, the water vapour is then not visible.
Also residual fuel in the exhaust gas will be expelled as the engine usually adds extra fuel to make starting easier at low temperature. On a modern engine the air intake has a heater to preheat the air to assist this process. Excess fuel in the exhaust gas may be coloured Black.
Faults in the cylinder head gasket may allow cooling system water to enter the cylinder bore under cooling system pressure after a journey. When the car is restarted from cold this water will be expelled into the exhaust system, and would be visible as white smoke ( steam) in the exhaust gas at start up. If the cooling system is being topped up on a regular basis, with no other leaks evident, this should be suspected, the smell of antifreeze from the cooling system being detected in this exhaust gas would be a further clue.

Never buy a car without seeing it start from cold, running it till hot and checking for the above. It can be 'disguised' by unscrupulous dealers selling a 'trade in' car through the trade. As on some fairly basic cars the cost is well in excess of £1000.00 (Yes) and count yourself lucky at that. Many other faults can cause smoke at start up, usually engine needs a major service . rebuild.

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1 Answer

Engine concern


Smoke (blue or black) or steam (white)? White smoke is really steam that is caused by water leaking onto hot surface. Could be leaking from hose running to heater coil under dash, or something else. Check radiator water level to make sure water level is ok. Blue smoke is oil burning. This could be dangerous, caused by similar scenario of oil leaking on a hot surface (from a gasket leak, etc), or exhaust fumes. Black smoke means something is actually burning and could indicate fire. Black or blue some could fill vehicle cabin with toxic fumes, even if you don't smell anything bad.

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1 Answer

Excessive exhaust when cold


Its cold! is it like polluting excessive? If the exhaust smoke is white its normal especially on a older car. Have you ever gone outside in real cold weather and when you breathe you can see the steam pretty much same thing. As long as the car is running the same then its more likely to be from the cold. Good idea may be to let your car thoroughly warm up before you drive off in cold weather.

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1 Answer

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I would start with a complete tune-up then if its running rich(black smoke) need to fix the problem like new air filter(s) and such do a compression test of each cylinder (one at a time) and see if readings all come close..may have burnt valves or blown head gasket also look at vacuum systems and see if any hoses are off missing or broken repost on this please thanks...

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Volvo 850 smoke coming from exhaust manifold


Not to worry. Run the engine up to operating temp before jumping to conclusions and let the heat burn off any excess oil. A leaf will not do any damage.Do not let the engine overheat while idling and if the oil light comes on switch off immediately.
The smoke from the exhaust is oil deposited by oily assembly hands just burning off. It should dissipate after about 15 minutes at most.(or 5 miles' drive)

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1 Answer

Mazda 323f gxi 2,o derv 04 model failed emissons on excessive smoke


Hi, Few things to check here, first i would check the Lambda sensor as this monitors the air fuel mixture and stops the car running too lean or too rich. The most likely option is that the catalytic converter may be at fault the element inside may have broken up over time and therefore is unable to breakdown the exhaust emission into a cleaner release of exhaust fumes resulting in emissions failure. At the very worst you may have worn piston oil rings that would also produce excessive smoke emissions from the exhaust.

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2 Answers

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Internal oil leak, change the spark plugs and cables, oil, filter and add Lucas oil. Take the car for inspection and let me know how it goes. For the belt depends where you get the parts and who does the work.

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