White smoke from exhaust when first starting — goes away after warmup

If the coolant level isn't dropping and it clears up within a minute, this is almost certainly **condensation** and completely normal. Here's what happens: Overnight, water vapor condenses inside the exhaust system (manifold, pipes, muffler). When you start the engine, the hot exhaust turns that water into steam → white "smoke." This is more noticeable when: - It's cold outside - Humidity is high - The car sat overnight vs. just a few hours **When to worry about white smoke:** - It persists well after warmup (5+ minutes) - It smells sweet (coolant burning) - Coolant level keeps dropping - The smoke is thick and billowing, not wispy - You see it in the rearview constantly while driving The persistent sweet-smelling white smoke = coolant entering combustion chamber = head gasket territory. But a brief puff at startup that clears up? That's just physics. Every car does it, some are just more visible than others.

One way to double-check: next time it's doing the white smoke thing, hold a piece of white paper near the exhaust tip for 10 seconds. If it just gets damp with water → condensation. If it leaves an oily residue with a sweet smell → coolant. If it leaves a dark sooty residue → oil burning (different issue).