I just purchased an 07 titan with 117k miles on it. The truck runs, drives, and idles perfect, but almost everytime I start it, LOTS of white smoke comes out the back then it goes away after about 10 seconds. I did find an empty bottle of GUNK in the back of the truck but Ive put almost 300 miles on it already so Im not sure if this is normal. I dont believe its a blown headgasket because the smoke goes away completely after 10 seconds.
White smoke coming out the exhaust
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White smoke usually means water. If it quickly goes away you may have a small seep in the head gasket that closes as soon as it heats up and burns off the initial accumulated water. I may be totally wrong, but that would be my first guess.
It doesnt smell or look like condensation. I live in arizona and it does it during 80 degrees dry heat.
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any water in the oil?
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Check for sludge in engine by removing oil cap and looking in. If any sludge at all oil rings are stuck or you got valve stem seals that have hardened and are letting oil bypass when engine is off. Sludge is a 5.6 killer just a little will do major harm.
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I dunno, but I can write a script: The plastic tank on the crappy radiator cracks, coolant leaks, engine overheats, block expands, head gasket gets crushed, radiator gets replaced, original owner notices white smoke, trades truck. New owner notices white smoke, goes to forum and posts WTF is up with this white smoke?
I can make my script even more elaborate: Original owner, noticing white smoke, suspects water in gas, dumps GUNK in gas tank. White smoke persists. . ., etc.
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117k is quite a bit and who knows how the engine was maintained or treated before you owned it. If the dealer is willing to replace it then I say go for it.
Thanks guys for the useful information. The dealer has the truck and they are in the process of replacing the headgasket. I really hope this fixes it because the whole reason I bought the truck is to tow my drift car across country to different tracks and the last thing I want is for it to break down on the way to a competition.
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WOW I have never seen a headgasket issue on a 5.6L!!!
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Oh yeah very rare, even on the forums
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im having the same issue and cant pin it down i have replaced pvc valves and im still having the same issue did the head gasket change take care of your problem
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Replace the valve covers and change the oil/filter. White smoke at start up on Titans/Armadas is usually from plugged baffles on valve covers due to sludge. If new covers don’t come with pcv valves pick up a couple. Probably cost a couple hundred bucks for the whole process. Good luck.
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