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Why is my 2000 kia sephia blowing blue smoke from the tailpipe. it has 86,000 miles. the check oil warning light is on even though the dipstick reads full.


The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.

Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.

Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.

Dec 08, 2014 | 2000 Kia Sephia

1 Answer

Camry csi 2000 oil leak between engine and transmission


Lots of Camrys do this.

The oil will typically leak from the rear main bearing seal between engine and transmission, but that will appear at the bottom of the joint line, and will not reach the exhaust. This leak is expensive to fix and is usually left as is.

A leak from the cam cover gasket can drip into the exhaust.

The other typical leak is from the distributor shaft o-ring seal. This appears at the top of the join line between engine and trans, and can blow back onto the exhaust.

Jan 03, 2014 | Toyota Cars & Trucks

1 Answer

I have a 2003 altima and I keep smelling exhaust fumes in the car.i have replaced the cat . Th esmell seems to be getting worse. What could be th eissue?


Exhaust leaks are a bear, i would first start off by checking where the headers meet the motor. broken down gaskets can release exhaust into the engine bay which will make its way into your cab. either way the burning off of oil is not good as exhaust leaks can damage your valve train and it makes for a very expensive endeavor. Tracking down your exhaust leak should be a top priority though!

Jan 29, 2013 | 2003 Nissan Altima

1 Answer

Seat alhambra leaking oil from exhaust and smoking


The most likely cause is a worn bore and the oil is leaking past the rings. It is possible that the oil is entering the combustion chamber through a breather.

Jan 19, 2013 | Cars & Trucks

1 Answer

My toyota vienta 3VZ-FE 1996 - oil leak onto exhaust


Hi,

That engine will leak oil from

- cam cover gaskets (rear one drips on the exhaust)
- camshaft end seals
- distributor shaft o-ring (appears on top of transaxle housing)
- oil filter bracket to block o-ring seal (drips on front bank exhaust)
- crankshaft nose oil seal (have done with timing belt change)
- rear main seal (expensive, leave it be)

Dec 06, 2009 | 1996 Toyota Camry

1 Answer

I have a oil leak under my car and my exhaust smokes after i drive it


the smoke is from the oil leak..oil blowing onto the exhaust while driving....where is the oil leak? at the rear of engine? check to see if your valve cover gasket is leaking...it could also be a rear main seal in the back of engine, maybe even the oil pan gasket.

Aug 16, 2009 | 1983 Volvo GLT

3 Answers

Exhaust leak and oil loss


the valve seals leaking oil inside the cylinder will cause an internal oil leak you can't see. exhaust leak is something different. best of luck.

Aug 06, 2009 | 2005 Kia Rio

3 Answers

Burnt Oil Smell


Check carefully around the valve covers, this is the area that leaks most frequently occur, and being located next to the exhaust manifold can easily cause the burning smell. There is a very easy to replace gasket under the cover. Other possibilities, shop or you when changed or added oil spilled a bit and that has worked down to the exhaust manifold and is causing the burnt oil smell. Last possibility is that you do have a slow leak on the underside of the engine that is blowing back onto the exhaust system causing the smell.

May 22, 2009 | 1998 Oldsmobile Intrigue

1 Answer

Dripping black oil from exhaust to cylinder head joint


hi most 2 strokes leak from here ,but try using general purpose silicone bath sealant,it worked on my 2 strokes

Mar 25, 2009 | 2000 Cagiva Planet

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