Q: What is knocking noise?

asked by on

Have a knocking noise that is at engine speed and sounds like from up top. Have opened up and only thing found was one tensioner had more play in it while wiggled.Chain didn't but tensioner did. Lifters and rocker arms looked good but when I pulled spark plug wires one by one while running , cylinder 4 the knocking lessened and sounded like it wanted to quit but still there
My car has a manual transmission.

Hello, thanks for writing in about your Dodge Ram 1500. If you pulled the cylinder 4 plug wire and the noise got quieter then this is an indication that you have a bad rod bearing or piston pin on the piston itself. If you need some help repairing this, have a certified technician, like one from YourMechanic, diagnose the noise from your engine firsthand and fix it accordingly.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. What is knocking noise?

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: Door Ajar alert staying on

Hi there. It sounds like it may be the door latch switch may have stopped working. It seems to be a common problem with this car and can be fixed easily. A common sign of the switch going bad is...

Q: Engine not getting any spark

Hey there. This is a common issue. I would need to know what repairs were performed originally to fully answer this question. There are quite a few things that would cause a no spark condition. If the car is in...

Q: Cranks but will not start

As you already know, I would suggest testing the coil packs for spark. Try also checking the crank position sensor to be sure it is working properly. When these go bad they can often cause the coils to not produce...

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...
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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...