Join Date: Feb 2010
Location: Lancaster, California
Vehicle: SLK32 '03
Other Toys: 2002 SV650S
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Engine clicking noise getting louder
When starting up, I have a noise coming from my engine compartment which sounds like a clicking or ticking. It goes with the RPM and has something of a diesel-y sound to it. When I open the hood to listen, the regular noise of the engine drowns it out. I figured this wasn't too big of a deal since it was just on the cold engine, but now it's begun to remain throughout the drive and is becoming louder. What are some things I should look for? Perhaps a pulley, the oil or the water pump?
Potentially unrelated, I had to add coolant recently. Perhaps a slow leak at the water pump, but I haven't added or changed coolant for 1.5 years.
As always, thanks for the help!