Hey guys, I have a 99 Accord V6 with about 98K and have a question. The engine will make a rattle or knockin type sound when the engine is cold, it's seems more on a day of 50F or less, and it's not a constant noise but it will rattle for a second then go away, then again and so forth. It's hard to tell exactly where the noise is coming from but sounds like it's on the driverside of the engine compartment. It started doing this about a year or so ago, I have had the valve clearances checked and adjusted and have done routine maintenance also. I have read some threads on here suggesting that it could be lifters but this can't be because it has no lifters on it, SOHC which has the cam, rockers and valves but no lifters. The noise will continue but for no longer than a minute, and does not do it again until it sits over night and it's completely cold again. Does anyone have any ideas on what this could be? If you need any other info please just ask, thanks.