Question about 2001 Chevrolet Silverado 2500HD

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Blue smoke out of the exhaust of 6.6 duramax diesel

Engine has a lot of power but when I step on the gas it blows a lot of blue smoke ! Why ?????

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  • Chevrolet Master
  • 2,101 Answers

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

Posted on Dec 10, 2012

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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badealer888
  • 414 Answers

SOURCE: 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.

Posted on Jul 02, 2009

cmcduncand
  • 714 Answers

SOURCE: my ford 6 liter blows blue smoke under

Engine Smoking:
.
Black Engine running rich Possible Failure
-Map sensor, fuel injector or fuel pressure regulator.
Blue -Replace Faulty Transmission modulator valve
White Possible Failure. -Head gasket.
Hope this tip helps.
r/
David

Posted on Mar 10, 2010

edwardjwoods
  • 372 Answers

SOURCE: blue smoke comes out the exhaust pipe after going 65-80 mph when you slow

check engine light on

Posted on Jun 29, 2012

Molson02536
  • 3854 Answers

SOURCE: 2002 2500hd 6.6 duramax diesel is blowing smoke

Bulletin No.: 03-06-02-005B
Date: November 18, 2004
TECHNICAL
Subject:
Engine Coolant Loss with No Visible Leaks (Reseal Injector Sleeve)

Some owners may comment on engine coolant loss with no visible leaks. Excessive white smoke or a coolant type odor coming from the exhaust pipe, along with low coolant levels, may indicate coolant in the combustion chamber.
Cause
Condition may be caused by engine coolant entering the cylinder due to a dirty or damaged seal between the fuel injector sleeve and the cylinder head.

If it's black smoke, you could have a faulty or dirty EGR valve and may not be closing 100%. Remove the EGR valve and clean it with spraying carb cleaner and reinstall after inspecting the valve can move without any binding. Goo luck and hope this helps.

Posted on Jun 25, 2009

  • 99 Answers

SOURCE: smoke when idiling

U need to replace your valve stem seals.

Posted on May 20, 2010

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1 Answer

Have LT 1536 . Smoke started coming out the exhaust but engine sounds healthy


Depends on the colour of the smoke.
Unlikely an engine will sound healthy emitting black smoke - excess fuel.

An engine could sound healthy emitting white smoke (steam from coolant) but not from white smoke (excess unburned diesel).

Most engines emitting blue or blue-grey smoke from burning engine oil can sound very healthy.

Dec 10, 2017 | Cars & Trucks

1 Answer

I'm looking to purchase a used car. I've been doing online research and saw this webpage http://www.usedcarsmells.com . They talk about exhaust color and smells. Is it true that you could tell a lot about...


Yes this is correct, you can get important information from the colour of smoke from the exhaust:

Blue/Gray Smoke: Blue/gray exhaust smoke is an indication of oil burning in the combustion chamber. These are possible symptoms and causes:
Valve Seals: Leaking valve seals will cause blue/gray smoke at startup because oil leaks past the seals into the cylinder after the engine shuts down.
Valve Guides: Excessive clearance between the valve stem and the valve guide allows oil to leak past the gap into the cylinder.
Piston Rings: Worn or damaged piston rings will cause blow-by resulting in blue/gray smoke.
Worn Cylinder Walls: Worn cylinder walls cause blow-by resulting in blue/gray smoke.
PCV System: A stuck closed PCV valve will cause excessive crankcase pressure resulting in blue/gray smoke.
Black Smoke: Black exhaust smoke is an indication of a rich fuel condition. These are possible causes:
Fuel Injectors: A leaking or dripping fuel injector will cause a rich fuel condition.
Fuel Pressure Regulator: A stuck closed fuel pressure regulator will cause a rich fuel condition.
Fuel Return: A restricted fuel return line will cause a rich fuel condition.
White/Gray Smoke: White exhaust smoke is an indication that coolant is burning in the combustion chamber. These are possible causes:
Cylinder Head: A crack in the cylinder head (around the coolant jacket) will cause coolant to enter the combustion chamber.
Engine Block: A crack in the deck of an engine block near the coolant jacket will cause coolant to enter the combustion chamber.
Head Gasket: A damaged or blown head gasket will cause coolant to enter the combustion chamber resulting in white/gray smoke coming from the tailpipe.

Jan 17, 2015 | Cars & Trucks

2 Answers

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

2 Answers

My mazda 626 has a strong potent smell coming from the exhaust


You don't mention what that smell is reminiscent of?

You don't mention the colour of the "smoke" and you didn't say whether the engine is petrol or diesel?

You don't mention whether the road behaviour/performance is normal?

White smoke is almost always steam or in the case of a diesel it could be an unburned fuel mist, grey/black is excess fuel and blue or grey/blue is burning oil.

Some steam is fairly normal until the engine and exhaust system is hot but excessive amounts could be one symptom of head gasket trouble. If the engine is drinking coolant and sending it through the exhaust as steam it will sometimes smell spicy.

Burning oil smells a bit like burned eggs in the frying pan.

If the car hasn't ultra-low sulphur oil and fuel the catalytic converter will convert sulphur traces into hydrogen sulphide - the bad egg gas...

Sep 27, 2017 | 1998 Mazda 626

1 Answer

Mazda 6 1.8 ts 05 constant blue white smoke out of exhaust


It probably has some internal engine damage. If you pull the spark plugs one or more will probably be oil fouled.
You may want to have a compression test done and see if you can find the source of the oil - may be a head gasket.

Aug 27, 2012 | 2005 Mazda 6

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

Have excessive blue or white smoke from exhaust when truck is started after sitting for a few hours 2005 f250 6.0 ehgine


Hi,
is it a diesel or gas engine?
Usually excessive blue smoke on start up indicates oil is getting into the combustion chamber. It could be piston rings or valve seals.
Quick check, drive it within operating range and speed. Either use the rear view mirror or get someone to drive it and you follow in another vehicle. Accelerate, then take your foot of the accelerator. Blue smoke under acceleration indicates piston rings / pistons. Blue smoke on deceleration or the "over-run" indicates worn valve guides / seals.

White smoke can indicate coolant in the combustion chambers / leaking cyl head gskt, or incorrect fueling. If brake fluid gets into the combustion chamber it will generate a lot of white smoke from the exhaust. However, that would entail a leaking brake master cyl and a leaking brake booster.

Good luck.

Jan 27, 2011 | Ford F-250 Cars & Trucks

1 Answer

Excessive black exhaust on 2003 GMC Sierra Duramax Diesel.


This is what i would try (cheapest first) redexe/wyyns
injector cleaner,double dose,then i have put 1gal gas in 10gal diesel to increase burn temp (you may encounter a hot start problem temporarilly)then if still smoking, get a compresion check on the engine(this will tell you volumes)
by the way the NATO tanks put in 1/3 gas in diesel to stop it freezing in arctic conditions.any more than 1/3 can result in problems.

Mar 17, 2010 | 2003 GMC Sierra

1 Answer

Nissan navara d40 drinking diesel but still have power, 2435klms on clock, real blue smoke


a stuck EGR valve, dyno the vehicle and fix the EGR, (exhaust gas temp dropped from 650deg due to exhaust gasses constantly being fed back through the engine to 480). Fuel economy back is to normal.

Jul 20, 2008 | Nissan Pathfinder Cars & Trucks

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