Interesting...as I too occasionally have a rattle at light/medium throttle around that RPM. 95,000ks....I dont think there is a replacement issue with the tensioner - its not mentioned in honda service manuals when to check ( only the belt tensioner) So Im guessing its checked/replaced whent he timing chain is....in which i cant find any info on lol.
By design, it should last the life of the chain. In reality, it is not the case. The teeth or the ratchet wears out and you get the piston retracting too far, causing chain rattle. Unfortunately, the only way to check is to remove the timing chain tensioner and visually inspect the ratchet and teeth.
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