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: Dirty engine

You can just wash it off. Dirt and oil accumulation can be washed off an engine without disassembling anything. Put a plastic bag over the distributor. Use some aerosol degreaser spray if you have built up oil accumulation and use...

Q: 2006 Pontiac GTO not always starting up

With the rise of any electrical problem in a battery operated system, the first place to check is the health of the battery and integrity of the terminal connections. These connections at the battery must always be clean and tight....

Q: Whining noise of the CVT transmission during acceleration on a 2013 Nissan Altima

Here is the problem with Nissans. Nissans were great cars when they were Datsuns. Then they called them Nissans because they wanted them to look more Japanese. In the last decade and a half, their quality has gone downhill. ...

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...
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...
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...