Skip the auto shop - Our mechanics make house calls

Q: Knocking from the engine

asked by on

I can hear a strong knocking from my engine. I think it could possibly be a pushrod or rocker arm. The engine idles out with the knocking.

Although it is unlikely to be the cause, I would recommend checking your engine oil level. If your oil level is low, the engine will not be lubricated sufficiently enough to function properly and will therefore make knocking sounds as the metal engine parts come in contact with one another. If the oil level is at the specified level, I would recommend having an engine inspection performed by an engine diagnostics professional. It is possible that your engine may have suffered internal damage and may require replacement of valves, camshafts, lifters, and/or other internal engine parts. Only a thorough engine inspection will reveal the true causes of this issue.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: What are the odds of all injectors(or however many it takes for truck not to start) get clogged up. Truck was running fine and now it won't start.

Hi there. Check the fuel injectors for power to the harness on each injector. Make sure that there is a voltage reference. If there is no voltage reference, then there may be an issue with the main harness from the...

Q: Engine not turning over when starting.

The most common problem for the engine that will not crank (if the battery is okay) is the starter. I recommend that starter is checked for proper power getting to it from the battery and the ignition switch before replacing...

Q: Car overheats when idling only

The cooling fan clutch on this engine requires the hot air flowing across the radiator to lock up the clutch when it starts getting hot. Some of these vehicle's radiators have a leak, or flow problem, that will cause the...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.