Question about Renault Clio

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White smoke pouring out of my diesel Renault Clio

My car was contaminated with dirty diesel. The fuel was taken out the car was cleaned of any contaminating fuel. A diagnostic was done and said we needed 2 new injectors they were put in that didnt help or make the car start. We had different people say different things in the end we had 4 brand new injectors put in and dialled in, new temperature sensor, the fuel pipes all checked, a new air filter, new diesel, the tank cleaned and now the car will start but has pure white smoke coming out and wont do anything,the car practically has new everything on it and has been tested by 4 different places and it says there is nothing wrong but OBVIOUSLY there is what could it be? I really need help we have spent so much money and the problems never ending! Anything suggestions please, i would be so grateful. Thank you :)

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  • dillon guay Oct 25, 2012

    well i dont have an exact answer but two possible directions, the amount of white smoke that i think u are speaking of usually points towards head gasket but at the same time with being a diesel that could also be raw diesel fuel that has been atomized sorry i couldnt be more help

  • Grant Shaw
    Grant Shaw Oct 25, 2012

    is it automatic or manual?

  • ivan whisker
    ivan whisker Oct 25, 2012

    how long has it been doing it for if only a few days it will take a bit to burn off but as previousley stated could be a head gasket blown is there any discoloration in the radiator like a thick white gunk same as on the oil filler cap look for the same thing but its not right if there is white smoke good luck ivan uk

  • ivan whisker
    ivan whisker Mar 20, 2017

    did you check for white gunk in oil and water white smoke is defo water in combustion chamber it will never run off and will get worse as the head gasket get worse

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  • Renault Master
  • 3,206 Answers

You failed to mention what the dirt in your diesel actually was? The fuel filter of a diesel system is so efficient most dirt contamination never reaches the important mechanical parts and small amounts of water or similar also will not be a threat...

White "smoke" could conceivably be steam from an internal coolant leak but if the coolant level hasn't fallen that is unlikely.

White "smoke" from a diesel engine is almost certainly unburned fuel. That means either so much is being injected it is failing to burn or something else is preventing proper combustion - or a combination of events.

I once had a truck in for repair that created so much white smoke the scenery completely disappeared after a few seconds. The fault was a blocked exhaust system. Once the exhaust system was functioning normally the engine started and ran normally...

There is a tendency for the modern vehicle technician to rely too heavily on electronic diagnosis and because it works a lot of the time they lose the habit of checking the basics even though best practice says the basics should be checked before any attempt at electronic diagnosis is made.

If the contamination was something volatile and the exhaust is fitted with a CAT and/or a DPF it is quite possible the CAT could be melted.
If that is the trouble the engine is still likely to smoke for a while but the previous performance should be restored.

Posted on Mar 16, 2017

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  • Renault Master
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You have fuel delivery issue, what they are will take a diesel engine service technician time to figure out.

Posted on Mar 16, 2017

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Posted on Jan 02, 2017

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SOURCE: We have a 3.2 DiD

You generally only get white fuel smoke from a diesel when one or more cylinders aren't firing. If it were injecting more fuel than can be burned into a cylinder that is firing you'd get black smoke. You can get gray smoke from a cylinder that is firing cold or late, but blue obnoxious smoke is more common with late injector pump timing. Dirty/failed injectors also generally make a rude blue smoke.

Run a can of Diesel Kleen through it. If you can't get it where you are call a local truck service and ask what they recommend for cleaning the pump.

Check and keep watch on the oil and coolant- white smoke from a warmed up diesel is usually coolant that is getting into the combustion chamber, typically from a failed head gasket or cracked head/block.

If you see any oil floating on the surface of the coolant, or if the oil starts to look milky, this motor must be serviced and the issue found or it won't last long.

lp

Posted on Jan 01, 2011

c1apton15
  • 3400 Answers

SOURCE: The vehicle wouldn't start in

Run a heavy duty cleaner like Sea Foam through fuel system. Then replace fuel filter and spark plugs. This should cure your issues.

Posted on Feb 26, 2011

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Turbo shaft oil seal is probably leaking a little bit, though not ideal it isn't unusual and not particularly detrimental (mostly).

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Injectors need cleaning if it is a diesel
There is a buold up of contaminants in your fuel system that needs to be cleaned out

If it is a petrol engine I would be very surprised

Just add a couple of treatments of injector cleaner to a full tank of fuel and go out for a high rev blast for an horor twom that should hopefully clean it.

My old renault laguna failed emissions so I PUT 2 bottles of forte injection cleaner and went out for a 70 mile blast, it was a diesel car. I returned to the testing station within 2 hours and the black smoke had ccleard and I got the pass certificate.

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Hi Vicky,
If we're talking about a diesel engine I think you should replace the fuel filter very urgently. White smoke usually indicates water contamination in the fuel and water can cause serious damage to the injector pump and other parts of the engine. I'd suggest that you have the fuel tank checked to see if there is contamination inside it.
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You generally only get white fuel smoke from a diesel when one or more cylinders aren't firing. If it were injecting more fuel than can be burned into a cylinder that is firing you'd get black smoke. You can get gray smoke from a cylinder that is firing cold or late, but blue obnoxious smoke is more common with late injector pump timing. Dirty/failed injectors also generally make a rude blue smoke.

Run a can of Diesel Kleen through it. If you can't get it where you are call a local truck service and ask what they recommend for cleaning the pump.

Check and keep watch on the oil and coolant- white smoke from a warmed up diesel is usually coolant that is getting into the combustion chamber, typically from a failed head gasket or cracked head/block.

If you see any oil floating on the surface of the coolant, or if the oil starts to look milky, this motor must be serviced and the issue found or it won't last long.

lp

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In what condition was the filter you removed? How bad? Temperature issues? Missing coolant maybe? If yes, you might as well have an internal leak. Some gasket maybe. Check all you vital fluids levels. If anything missing, take the time to empty the engine oil on a can, and check the colour. If it will look like chocolate brown, then you do have a leak from the inside.

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