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Peugeot diesel engin car exhaust is blowing grey blue smoke which clears after a while what is it

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Blue/grey normally means your car is burning oil, could be head gasket or cylinder/rings......be careful of car going into high revs.

Posted on Jun 09, 2014

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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

2 Answers

Navara 2.5 diesel only reaching 2,000 rpm


Blue smoke is oil. Compression check. and check plugs for fouling.

Apr 26, 2014 | 2005 Nissan King Cab

1 Answer

Grey blue smoke from exhaust it goes after a few miles what is it


Blue'ish smoke is caused by burning oil. Sounds like you have hardened valve stem seals. When they get hard, they allow oil to seep into the cylinders while it sits over night. When you start the car it takes a little while to burn out the oil. In the early stages once you are running it will seal up OK, but as time goes by it will begin to seep even while you are running. Using full synthetic may help the smoke because the synthetic oil will not burn. You can also go 10,000 miles between changes. (Watch your oil level though since you will not be changing every 3000).

Hope this helps.

Mar 17, 2014 | Peugeot Cars & Trucks

1 Answer

When first starting up smoke comes from exhaust and makes a loud noise


Black smoke is excess unburnt fuel. Blue smoke is oil being burned, if blue the valve stem seals may be allowing oil to seep down over night.

Dec 31, 2013 | Peugeot Partner Cars & Trucks

1 Answer

Blue smoke out of the exhaust of 6.6 duramax diesel


blue smoe is the sign of burning oli. it ban be rings or valve seals

Dec 10, 2012 | 2001 Chevrolet Silverado 2500HD

1 Answer

Toyota Caldina 1999, too smoke from exhaust


if it is diesel and you have black smoke you need fuel injectors either serviced or replaced also you must check the engine valves clearance. If your smoke is blue white smelling unburned fuel renew injectors.If it is blue white smelling oil and diesel then you will have piston rings and valve steam seals.

Aug 26, 2012 | Cars & Trucks

1 Answer

1.9 dci no power and bluey grey smoke is coming from the exhaust


There are indeed traces of oil coming out of the exhaust. Blue smoke is burning oil. Grey or white smoke is usually coolant/water going through the engine. This can be caused by leaking head gaskets, valve guides depending on the engine, excessive blow-by, etc. Large amounts of oil are not good; and water is even worse. I would look at getting the head gasket replaced. The loss of power is because neither oil or water likes to burn, and once your engine clears it out, it probably runs ok for the rest of the day. Then I'm guessing the next morning, it comes back. This is an urgent fix, because prolonged leakage can damage the engine block, head, or both.

Oct 19, 2009 | Renault Sport Cars & Trucks

1 Answer

6.6 liter diesel blows blue smoke


check turbo tubes for oil. If wet turbo is leaking. otherwise you may have rings leaking, how is compression?
Also there is a crankcase pressure soleniod in left side of enigine block, it should NOT rattle.

Jun 29, 2009 | 2001 Chevrolet Silverado 2500HD

2 Answers

Engine smoke and doesnt start easy when it is cold


Ones the diesel engine gets weak its thn a hard start!, becausea diesel engine mainly fires up on good compression, i guess its time for an engine overhaul .

May 06, 2009 | 2005 Hyundai Santa Fe

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