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Re: 3.9 rattle
They don't even have tensioners, that's why they make the sound. They do make a tensioner kit now for this problem, but it's a sickening job to install it. That's what it is. Sometimes my 3.9 backfires. Even though the chain doesn't jump a tooth, even being that loose can cause it to have bad timing at certain revs I guess. This doesn't help fuel mileage much either.
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