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.

A: Hello, thanks for writing in about your Dod...

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.

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

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Needing help with compatible parts. 2002 Jeep Liberty

The best place to find the answer to this question is at an auto parts store. You will need to find someone willing to help you identify substitute compressors. I am assuming you are wanting to use a used unit...

Q: Engine misfiring in a 2002 Pontiac Montana

A misfire could be caused by number of problems but since you are getting the p0204 and p0203 I believe that is is probably an injector that is causing the misfire. I would replace the injector for the number 3...

Q: Noise and poweless

Hello. The most common cause of a sudden power loss like this is either a fuel system issue like a weak fuel pump or a failing catalytic converter. Most of the time, if there was a noise prior to the...

Related articles

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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...