I've noticed lately that my car is making a clicking noise when the engine warms up. It is really weird: I can can predict when the noise will start just by looking watching the temperature gauge. Once it reaches certain temp it starts. It's a very distinctive sound like a diesel clicking. When it's cold it runs like a charm so it's a very different issue than carbon deposits. It's almost as if the engine wasn't getting enough oil but the oil pressure looks just fine and it would be noticeable with cold engine. So I really don't have a clue. Any ideas are appreciated.
Tom