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

Add photo

Related Questions

Search Ford Explorer Sport Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Explorer Sport Experts

#1 chassy
chassy
Reputation 340
#2 Tom Demyan
Tom Demyan
Reputation 200
#3 tennisshoes
tennisshoes
Reputation 180
View All

Related Models For Sale

Used Ford Explorer
1,069 Great Deals out of 71,554 listings starting at $1,000
Used Ford Explorer Sport Trac
71 Great Deals out of 2,084 listings starting at $1,999
Used Jeep Grand Cherokee
903 Great Deals out of 66,334 listings starting at $1,500
Used Ford F-150
3,017 Great Deals out of 207,758 listings starting at $1,000
Used Ford Edge
906 Great Deals out of 50,608 listings starting at $3,500
Used Chevrolet Tahoe
818 Great Deals out of 27,815 listings starting at $1,700
Used Toyota 4Runner
362 Great Deals out of 20,760 listings starting at $2,495
Used Ford Expedition
470 Great Deals out of 24,753 listings starting at $1,500
Used Dodge Durango
365 Great Deals out of 23,171 listings starting at $1,500
Used Ford Escape
1,315 Great Deals out of 86,925 listings starting at $1,150
Used GMC Acadia
776 Great Deals out of 42,233 listings starting at $2,921
Used GMC Yukon
556 Great Deals out of 17,134 listings starting at $1,875
Used Toyota Highlander
553 Great Deals out of 23,068 listings starting at $2,295
Used Honda Pilot
477 Great Deals out of 18,296 listings starting at $950
Used BMW X5
486 Great Deals out of 15,392 listings starting at $2,500