Engine knocking noise, smoke, exhaust smoke engines mx-6 ...

Q: Engine knocking noise, smoke, exhaust smoke

asked by on August 24, 2016

Yesterday the engine started to knock loudly. There was smoke coming from it. Also the exhaust was making a lot of smoke. What might be causing this?

Hello. There are several possibilities for the engine knock. It could be caused by a busted piston, broken valve, or something internal in the engine. The smoke may be due to an internal damage on the engine block and/or oil leaking somewhere within the system. Have a qualified professional inspect the smoking issue and knocking noise in person in order to have this diagnosed correctly.

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

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

Car still won't start

That sounds very frustrating. It's hard to say from here what is going on but it could be a poor connection somewhere, or that one or more of your replacement parts is defective. There are a lot of rebuilders putting...

My steering wheel is locked.

Hi there. Sounds like the steering wheel lock solenoid is not working. To get to the solenoid or to remove the lock, you would need to remove the battery cables (both) and remove the horn with the airbag from the...

The engine revs when the E-brake is used

Hello! We will be happy to help. I believe the problem that you are describing is a normal driving pattern. In your particular vehicle Lexus/Toyota implemented a system called Artificial Intelligence Shift Patterning. It is consisted of many sensors which...

Related articles

Top 10 Ways to Extend the Life of Your Car
Every driver wants a car that lasts a long time. Make your car last longer by checking your motor oil, parking in the shade, and keeping it clean.
Symptoms of a Bad or Failing Fuel Pump
Common signs include a whining noise, hard starting, engine performance issues, and an inability to start the car.
Symptoms of a Bad or Failing Door Lock Actuator
Common signs include unusual noises coming from inside the car door and the power door locks not working or behaving erratically.