Skip the auto shop - Our mechanics make house calls

Q: Noise coming from front left side of engine.

asked by on

I suspect I may have a issue with the timing chain guides in this engine. Please tell me the fastest and surest way to confirm this. At fast idle there is a random knocking noise coming from the area of the AC Compressor. However I have my suspicions it is not the Compressor.

My car has 70000 miles.
My car has an automatic transmission.

A: Hello. Most of the time when this noise occ...

Hello. Most of the time when this noise occurs from this engine, it is a timing chain problem. To isolate this, I usually remove the engine drive belts and run the engine to see if the noise disappears. If it does, then it is in one of the engine pulleys. If not, then it is in the timing chain assembly and that will need to be repaired. If you need to have this knocking noise looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

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: Truck turned off and was hard to restart.

Hello. If the crankshaft position sensor is going bad, then the engine will typically run like this. The crank sensor tells the engine control module what the speed of the engine is. It uses this to determine when to send...

Q: Engine mifiring at higher RPMs, tachometer spiking up

Try to replace the ignition module and coil which is mounted top right side of the motor. The ignition module supplies the tach signal and the coil supplies the spark to the plugs. It is a good idea to replace...

Q: ABS/VDC/Slip light on.

Hello. If these lights were not on prior to replacing these parts then you need to start by checking the brake fluid. Low brake fluid or a bad brake fluid level sensor will cause this problem. If the fluid and...

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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...