Smoke from exhaust blue

Asked by May 27, 2016 at 12:04 PM about the Ford Explorer Sport

Question type: General

Smoke from exhaust blue

1 Answer

5

blue is oil white is coolant/head gasket black too rich fuel mixture 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 exhaust smoke. 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 causes 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.

Your Answer

Ford Explorer Sport Experts

  • #1
    tennisshoes
    Reputation
    380
  • #2
    chassy
    Reputation
    340
  • #3
    Tom Demyan
    Reputation
    290
View All

Related Models For Sale

Used Ford Explorer
1,175 Great Deals out of 64,181 listings starting at $1,499
Used Ford Explorer Sport Trac
66 Great Deals out of 1,781 listings starting at $1,200
Used Jeep Grand Cherokee
1,067 Great Deals out of 67,521 listings starting at $950
Used Ford F-150
3,268 Great Deals out of 224,293 listings starting at $1,250
Used Chevrolet Tahoe
889 Great Deals out of 39,792 listings starting at $1,990
Used Ford Expedition
463 Great Deals out of 17,529 listings starting at $1,000
Used Toyota 4Runner
319 Great Deals out of 27,207 listings starting at $1,900
Used Ford Edge
1,013 Great Deals out of 49,751 listings starting at $2,750
Used Dodge Durango
380 Great Deals out of 23,760 listings starting at $1,495
Used GMC Acadia
1,015 Great Deals out of 46,146 listings starting at $2,990
Used Toyota Highlander
569 Great Deals out of 37,085 listings starting at $2,500
Used Honda Pilot
698 Great Deals out of 36,941 listings starting at $888
Used GMC Yukon
579 Great Deals out of 18,668 listings starting at $2,000
Used Ford Escape
1,356 Great Deals out of 98,100 listings starting at $1,000
Used Ford Mustang
445 Great Deals out of 42,042 listings starting at $1,488

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.