Q: Q: Knocking from the motor

asked by on

When I start my truck, there is a loud knock coming from the motor

My car has 182000 miles.
My car has an automatic transmission.

Hi. The usual cause of the loud knocking in these motors are one of two things (or both). The timing chain guides become loose or worn out and sometimes causes the engine to knock or tick when it is running. The other possible cause of your knock is there are worn out internal engine parts in the engine block. For example the piston bearings are worn-out, the crankshaft is worn-out, or the piston ring has broken or is worn out causing the noise. If the timing chain is the problem that can be fixed without replacing the engine. If you have any of the other parts that I mentioned causing the issue, then the engine will have to be replaced or rebuilt. A professional technician from YourMechanic can come to your car’s location to inspect the engine noise and advise you on the correct repairs.

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. Q: Knocking from the motor

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: Where is the FPDM on a 2007 Ford Expedition?

Hey there. This video should help you locate the FPDM on the 2007 Expedition and resolve whatever problems you're experiencing. If this doesn't help - contact your local Ford dealership and ask them for a detailed schematic for your vehicle....

Q: How to change the high pressure hose on Cadillac Deville DHS 2001?

Hi there. You would be very well served to search online for a 2001 Cadillac DeVille service and repair manual, which will give you the steps for completing this and virtually any other repair you'll complete on your car. ...

Q: if my truck stalls as soon as i put it in gear is it the Torque converter?

Hi Julian. Thanks for contacting us today. It very well could be that your issue is caused by a worn out torque converter. However, it's also possible that you have a faulty fuel system component or damaged ignition system part...

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...
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...