Skip the auto shop - Our mechanics make house calls

Q: Knocking sound

asked by on

Knocking sound from the engine but it stops every once in awhile

My car has 175000 miles.
My car has an automatic transmission.

A: Hi there: Most of the time, an engine knoc...

Hi there:

Most of the time, an engine knocking issue is caused by low oil pressure or low oil levels causing metallic components to hit each other without proper lubrication. It could also be caused by loose cylinder head hardware, such as intake valve guides or rocker arms that are loose. The best way to know for sure is to have a professional mobile mechanic complete a car is making a noise inspection.

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・Save up to 30%

Get a quote

What others are asking

Q: intake manifold gasgit replacement

If oil is leaking into your cooling system, it is very possible that you have an intake gasket leak. It is also possible that you could have a cylinder head gasket leak. If oil can also be seen from the...

Q: Engine

To properly diagnose this, more information and testing is needed. The next time this occurs, take a look at the temperature gauge. A thermostat that sticks intermittently can cause the vehicle to overheat. The result is that the engine oil...

Q: Brake fluid puddle on carpet. Resevior is empty, filled it, and it emptied again

This suggests you have a leak near your brake booster or master cylinder where the rod enters the master cylinder. This may also be related to the clutch master cylinder as well as your car has a clutch master cylinder...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.