Q: My truck wont start. I was driving it earlier and a big cloud of white smoke came out of the exhaust and it completely shut off

asked by on

My truck wont start. I was driving it earlier and a big cloud of white smoke came out of the exhaust and it completely shut off.

My car has 178000 miles.
My car has an automatic transmission.

Hello and thank you for contacting YourMechanic. White cloud of smoke from the exhaust means that the engine coolant has gotten into the combustion chambers of the engine and is burning the coolant. This could be caused by a blown head gasket, warped or cracked head, a corrosion burn in the timing cover behind the water pump, or a cracked block. To check for a head gasket, get a block tester tool. Put the blue fluid into the tester and install the plunger. With the engine running at cold temperatures, remove the radiator cap. When you see steam come from the radiator, place the tester over the steam and squeeze the plunger. This will suck the steam into the tester. If there is any carbon deposits (gasoline) in your coolant, then the blue color will turn yellow or orange. If you have a yellow or orange color, then the head gasket is blown and needs replaced. If you need further assistance troubleshooting your vehicle, then seek out a technician, such as one from YourMechanic, that can assist you with your vehicle.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. My truck wont start. I was driving it earlier and a big cloud of white smoke came out of the exhaust and it completely shut off

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My Volvo hf7 is cranking but it does not start. What is wrong?

Hi there. I see your question is about a Volvo HF7 even when you clicked the Toyota Avalon buttons - I'm will be answering this question as it is associated to the Volvo HF7 vehicle provided. Check the battery cables...

Q: Car will crank but won't start, mechanic says the fuel pump is fine, I'm not sure why, also the battery died quickly from trying t

Hi there. If a car will crank over but will not start, it is typically due to one of two issues. First, the engine is not getting enough fuel or not the right mixture of air to fuel. Second, the...

Q: Stalls when driving, at turns and at stops ?

Hi there. The most likely cause for the engine stalling is, a dirty/faulty IAC (idle air control) valve. Assuming, the check engine light is not coming on, leads me to believe the PCM (powertrain control module)/computer is not recognizing the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...