Q: Noise coming from front left side of engine.

asked by on October 04, 2016

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.

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?
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・Fair and transparent pricing

Get a quote

What others are asking

Bypassing oil cooler

The only way to determine if your operating conditions permit bypass of an OEM engine oil cooler is to install an oil temperature gauge. If gauge readings are always below 240 degrees F. (but above 212 degrees F.) you do...

2001 Mercedes Benz E500 will not crank or start

It sounds like your Mercedes Benz E500 may have a starter issue. If everything works as far as the radio and lights go, the battery is most likely performing as it should. If the battery is okay and the starter...

Changed alternator in my 2013 Dodge Journey but engine light on and red flashing bolt. Auto zone said battery is good. Whats wrong

Hi there. It's quite possible that the alternator and battery are ok, but one of the voltage regulator, battery or alternator cables is the source of your problem. The best way to know for certain is to have a professional...

Related articles

What Are the Benefits of Having an Engine Rebuilt Instead of Replaced?
Rebuilding a damaged engine may be a more economical option than full replacement. In an engine rebuild bearings, gaskets, and seals are replaced.
How Does a Radiator Keep an Engine Cool?
Car radiators cool off your engine and prevent your engine from overheating. Coolant absorbs engine heat and dissipates it through the radiator.
How to Prep an Engine Block for Paint
When When you are rebuilding an engine, you’ll probably want to paint the engine block. It serves a few purposes including being clean and attractive in appearance, protecting from corrosion and rust, and offering a custom look, even matched with...