valve rattle 4.9
i have some rattling noise in my 4.9, i think it comes frome the valves, do they need adjustment? i think i read somewhere the where hydraulic self adjusting?
or could the rattle be something else under the valve cover? |
Well, the roker arms are non-adjustible, so we really need more info to provide suggestions.
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would it help to make video with sound on it?
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Exactly when and under what conditions does it rattle?
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from the moment i start the engine until i shut it of, when in neutral all rpms, when driving due to other noise i hear it untill +-20mph. lately it makes a grunge when starting aswell but i think it has an other cause
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Does it increase in frequency as the rpm's go up? Manual or automatic transmission?
"Grunge"? Whazzat? |
it increases as the rpm does , auto trans (c6)
growling noise= grunge |
The rockers are adjustable via shims under the pedestals but for your problem, I think it's highly unlikely they need to be adjusted.
A video would be extremely helpful. Can you get or borrow a mechanic's a stethoscope to help pinpoint the source of the ticking? |
here's are two video, one trying to start the truck second when just started, don't know if its noticeable in it just for luck.
http://s432.beta.photobucket.com/use..._3228.mp4.html http://s432.beta.photobucket.com/use..._3230.mp4.html regards |
changed spark plugs due to one cill was bad, rattle (ticking noise) is still present, it seems to start only a few seconds after the engine is started. not directly
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