David Britt Posted October 18, 2006 Share Posted October 18, 2006 Occasionally when I first start the engine of my 2006 IS350 after it has been sitting overnight, just as the engine is settling down to normal idle speed there is a loud, rapid ratcheting or rattling sound from the engine compartment for a couple of seconds. It is a real pride-killer, since the car for that moment sounds like a piece of junk. This noise is distinct from the well-documented clicking sound attributed to direct injection. So far I have received no satisfaction from either lexus.com or my local dealer. I don't know if this noise, too, could be somehow related to direct injection or if on occasion the anti-drainback valve in the oil filter does not seat properrly and the valve train is momentarily starved for oil pressure. Has anyone else had this problem and does anyone have an explanation? Quote Link to comment Share on other sites More sharing options...
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