Smoke Coming from Engine

Smoke rising from under the hood is different from exhaust smoke — it means something is leaking onto a hot surface. That demands immediate attention.

When smoke comes directly from the engine bay (not the tailpipe), something is contacting a hot surface and burning off. Oil leaking onto the exhaust manifold is the most common cause — it produces a grayish smoke with a sharp, acrid burning smell. Coolant leaking onto hot engine parts creates a sweet-smelling white steam. Electrical problems — a melting wire harness, a seized A/C compressor clutch, or an overheated alternator — produce an acrid, plastic-burning smell with darker smoke.

If you see smoke from the engine, pull over and turn the car off. Pop the hood carefully — if the smoke is thick or you see flames, keep the hood closed and call 911. For typical oil or coolant leaks on hot surfaces, opening the hood to ventilate is fine. Look for obvious wet spots on the exhaust manifold or engine block. A coolant leak might show up as a spray pattern from a pressurized hose. An oil leak will show as a dark wet area dripping down from above. Check fluid levels once things cool down.

When your engine is smoking and you're not sure what's going on, a mobile mechanic in Jacksonville, FL is exactly who you need. We come to you — no driving a smoking car through traffic. We'll identify the leak source, assess the severity, and fix it if possible on-site. Most oil and coolant leaks causing smoke are repairable in your driveway. Call (904) 788-7272 right away.