2005 Cold Start Knock-Rattle

Engine ran hot now makes a knocking/rattling on cold start SOMETIMES not every time. Drives fantastic, plenty of power. Secondary tensioners were replaced at some time. Both chains are tight. Quiet after initial start, won't knock again unless it sits overnight (sometimes not every time). Listen please and let's figure this out.
 
Hi.
It sounds like bearing knock. After sitting for some time oil runs back into the sump, then when started it knocks until oil pressure builds. Is it a high mileage motor? Did it just start knocking after it got hot? How hot did it get?

John
 
Engine ran hot now makes a knocking/rattling on cold start SOMETIMES not every time. Drives fantastic, plenty of power. Secondary tensioners were replaced at some time. Both chains are tight. Quiet after initial start, won't knock again unless it sits overnight (sometimes not every time). Listen please and let's figure this out.

Hello, did you ever figure out the issue? I have a 2004 with 39K (bought it 5 years ago with 18K) and all of a sudden last week it started making a similar rattling sound on cold starts. Runs fine otherwise. Haven't completed the diagnostics that you have but did check oil level and it is fine (regular oil changes, car does not leak, doesn't burn oil that I can determine as level is always in range between changes). Odd that it came out of the blue. Only thing I can think of is that it started after the zero degree weather we had in Dallas in February. The car is often only started about every other weekend, so it does sit quite a bit. Thanks.
 
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