Skip the auto shop - Our mechanics make house calls

Q: Knocking engine already change the oil but still doing it

asked by on

Engine knocking

My car has 164850 miles.
My car has an automatic transmission.

Hello there. Engine knocking is a serious problem with your 2006 Chevrolet Trailblazer. The most common cause of engine knocking is low engine oil. You did well by replacing the oil first. Other likely causes of engine knocking are low oil pressure, bearing damage, pistons failing, wrist pins, or engine rods. All of these are rather serious and generally lead to the engine being rebuilt. A qualified technician, such as one from YourMechanic, will be able to diagnose your engine knocking and advise you on any repairs needed.

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
  1. Home
  2. Questions
  3. Knocking engine already change the oil but still doing it

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: can i put dexos oil in my sunfire?

You sure can, it needs to be 5w-30 which is the correct viscosity (flow rate of oil) for your vehicle. I recommend the use of this oil.

Q: Brake noise

Try and drive it for a couple weeks after inspecting to make sure everything was installed correctly. The noise may change after the pads are seated into the rotors. When a pad and rotor are new, they will not match...

Q: Loud knocking noise

First the location of the knocking must be determined. The fix will vary greatly depending on the cause of the noise. Suspension components may have become worn or broken. Brake pads with worn hardware can also make some noise as...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...