Hey everyone. Bought a 2012 Sequoia w/138K miles on it last October with every maint record. It has been flawless and continues to run and drive flawlessly. I noticed a knocking while leaving a stoplight today and decided to check under the hood to see if it happens at idle. Sure enough, it does intermittently. I took a video of it and you can plainly hear the knocking every so often for about a second or two and then it stops. Got any ideas? No check engine lights, no leaks, engine oil and filter is about a month old/still full and no loss of power.