Well, today I lost my cool with my E53 4.6is. I have been a good parent, provided shelter, food, and toys yet it decided to have a hissy fit with me today. I had my timing guide tensioner changed the other day along with a ton of other work. Well, today the damn chain rattle is back again on a cold start. I'm not seeing any codes for timing advance on BankA or timing retarded on BankA so I'm hoping that my V-guide is ok and hasn't lost its plastic layer. That said, as soon as the oil pressure is up the rattle is gone and stays gone until the next cold start. I hadn't planned on potentially tearing the engine down. Has anyone else had this with their 4.6 and worked it out short of a timing chain service? I'm running synth 5w30 in it but I'm wondering if at 100K miles I should change that up. I would love to hear from some of you all as I really don't want to tear out my engine at the moment.

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2003 E53 4.6is, titanium silver, black Nappa interior