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Is this the timing chain tensioner?

12125 Views 10 Replies 5 Participants Last post by  Blizzard LE
its a fast clunking sound and i hear it the loudest on cold starts in the morning and night (cooler temps). its not overwelmingly loud but it is noticable (to me). kinda sounds like similar to what the fan does on a cold start if you can imagine. anyways, after i drive it, the sound pretty much goes away. no issue w/ anything. its been making the noise for as long as i can remember but it has always made me uneasy. i let the truck warm all the way up before every drive. it will sometimes lightly clunk the whole time till i drive it, which makes me rule out the common oil pressure explanation (never had btw). i stuck a screwdrive to the bottom of the timing chain cover and it is very prominent there. what do ya think? should i be worried or no?
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If it were piston slap, i would imagine it would go away as the temps went up and the toleraces were closed. top of the heads are surprisingly quite for a dohc motor imo. i have read several times that out valves train is non adjustable but to how much truth that holds idk. by what i can hear, the sprockets are quiet as well. the noise is most def coming from the bottom end of the chain cover or general area. the engine is super smooth (for a v8 so i didnt even think about the crank as an option)
That is correct about the non adjustable valvetrain. Only thing between camshaft and valvestem is a lifter cup that is solid.
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