Question about 2002 Renault Sportwagon

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Engine oil smoke blowing from exhaust. Renault Laguna Diesel.121,000 mileage.

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First thing to check is oil level. some diesels will use some oil. if this is real heavy soot and moisture, it could be the fuel distributor/pump going out. how does it run? if its running poorly, this could be your answer. check the valve adjustment(lash) for proper adjustment also.

Posted on Feb 03, 2010

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Wich valve?

Posted on Dec 15, 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.

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1 Answer

I have a Renault scenic diesel when accelerating it's blowing blue smoke with a burning smell?????


sounds like piston rings letting engine oil by ,have you checked the engine oil level ?no easy fix if it is rings engine overhaul required

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Is it a turbo diesel? It sounds like the turbo is shot. Black smoke and runs like **** a pretty sure signs.

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The car has black smoke comming out the back and a loud banging sound from the back wheels like somthing is loose. Renault laguna


black smoke could be oil or too much gas being burnt. The loud banging from the back could be bearings loose or an exhaust. Not sure about that one.

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Hi what motor oil do i use in a 1999 renault laguna


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1 Answer

Grey smoke from exhaust


Hi. This will be a turbo issue. It is malfunctioning.


The turbo unit is the power booster for the engine. Its main function is to push air into the engine and is operated by the exhaust gases. When the unit fails, it could cause the turbine to stick, which would cause drastic loss of power or what you are experiencing now,which will be, oil leakages into the exhaust turbine area. This oil leak will, generally, emit a very high level of grey smoke.


Basically, your turbo is damaged. it will need to be replaced.

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2 Answers

Renault megane scenic 1.9 dt r reg 1997 cold start problems


This being a diesel, lack of compression is your worst enemy. These symptoms sound like a blown head gasket. Check your coolant for signs of oil, and check your oil for signs of coolant. (oil will be milky looking) Also indicative of a head gasket problem is an oil or coolant leak from the engine as well. If you see no evidence of the above, have a compression test done, and it should show up.

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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.

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3 Answers

Black smoke coming from exhaust but car is running, have changed filters but no change.the car is renault megan dti 02


Black smoke usually means a rich mixture. For some reason the car is getting too much fuel. If the check engine light is on then take it to a shop with a code reader. They can tell you what sensor needs replacing. These newer cars are usually totally computer controled so if a sensor goes bad they will adjust the mixture incorrectly.

Aug 26, 2009 | 2004 Renault Sportwagon

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