Skip the auto shop - Our mechanics make house calls

Q: WHY IS WHITE SMOKE COMING FROM EXHAUST.??

asked by on

WHY IS WHITE SMOKE COMING FROM EXHAUST(WORSE ON START-UP).??
My car has a manual transmission.

Keep in mind there are several "classifications" of white smoke. If it is thin and dissipates quickly you should not be majorly concerned. Most white smokes are a sign of coolant being consumed and burned in the engine. This can be caused by cylinder head issues or a bad head gasket. This is unfortunately what you should be hopeful for, as it is the less extensive repair. Dense white smoke can be a bad sign. It typically means your vehicle is overheating, you have a blown head gasket, cracked heads, or a cracked engine block. Be careful to not confuse this with "grey" smoke which is typically associated with transmission fluid. You will want to perform several tests to pin point what system is leaking fluid into the engine.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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: Smoke on start up

Sometimes the muffler will hold some moisture when the exhaust cools from the day before. This moisture will evaporate quickly when you first start the engine in the morning and goes out the exhaust as steam. This is most likely...

Q: Suppose my car has temperature sensors, and if my car ignition is off, then it will allow me to connect my car to a mobile app

Hello, an app for accessing your car temp sensors (whether engine coolant or ambient air temp), will require access to the cars electronics through the OBD-II port, and a programmable communications device. The OBD-II port, and any temperature sensors on...

Q: I have smoke coming from the box in front of the condenser

Hi, thanks for writing in. It sounds like your condenser or your radiator could be leaking. I would recommend having the pressures of the air conditioning system checked and verify that the air conditioning system if functioning properly. Then I...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.