Skip the auto shop - Our mechanics make house calls

Q: The engine smokes heavily and consumes fuel abnormally.

asked by on

The engine stop on the way, and won't start. The mechanic said it was timing problem. He opened the timing. Now the engine starts but with heavy white smoke and consumed fuel by x15

My car has 198000 miles.
My car has an automatic transmission.

A: The white smoke may potentially indicate a ...

The white smoke may potentially indicate a blown cylinder head gasket. When this happens, the cylinder head gasket is failing to seal off the combustion chamber effectively causing an air leak into the cylinder which causes a drop in compression. This also causes the water passages in the cylinder head to leak coolant into the cylinder as well resulting in the coolant being burnt with the fuel. When this happens, this causes the white smoke to be expelled through the exhaust.

You may notice white smoke in or around the engine area as well. This will also cause the engine to overheat due to the lack of proper coolant flow throughout the engine and loss of coolant as it is burnt. To verify the cause of the issue, I recommend having a certified expert, such as one from YourMechanic, diagnose the overheating problem in person so that this can be addressed correctly.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Why Does a Car Burn Oil?

During normal engine operation, all engines use oil to lubricate all of the internal moving parts of the engine like the bearings, camshaft, crankshaft, timing chain, valves, lifters, piston rods, and piston rings. There are two different ways that the...

Q: Overheating - 2001 Cadillac Seville

Hello. This is a problem within the engine. Most of the time the head gasket leaks internally or there is an issue with one of the cylinder heads. A block check would need to be done in order to be...

Q: I changed the battery and alternator but for some reason the battery isn't charging what could be the issue

Check the fuse 65 in the main engine fuse box, it is a 7.5 amp fuse. Then check the main fuse A, a 120amp fuse. If both of these fuses are good then you will have to check them for...

Related articles

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 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...