White smoke on start up only | Ford Explorer Forums - Serious Explorations

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White smoke on start up only


March 4, 2007
Reaction score
City, State
Fairfax, VA
Year, Model & Trim Level
02 XLT
Hey all,

I noticed when I start my explorer (4.0L) in the morning it blows out a cloud of white smoke and the exhaust smells raw. The car drives fine with no smoke after the start up. The car sort of rev's up when it first starts as well. I did notice one of my spark plugs was white when I pulled it out. The others were fine. I have no idea what is going on and would love to try to figure it out. Any suggestions? I also have oil leaking out from the pully that drives all the belts. I'm going to try to take that apart here soon.

White plug and white smoke may mean a coolant leak into that cylinder. Possibly due to a blown head gasket.

normal moisture in the morning comes out white until its all evaporated out.

Blue-ish/white smoke is oil in the cylinder.
If its oil burning at start up it may be valve seals.

black smoke is a rich fuel mixture

Oil on the front pulley is usually a worn Front main seal. The crankshaft pulley has to come off to change it.

I don't know what to say about the "raw" smell. A sweet exhaust smell would confirm coolant in the cylinder.