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Old 08-10-2013, 05:53 PM   #1 (permalink)
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Default engine noise

It comes and goes, I had to take several videos to capture it. Goes away when I rev the engine or at least cant hear it.

20130809 135909 - YouTube

My first thought was spun bearing but Im pretty sure it wouldnt just go away for awhile? @ 23 seconds you can hear the knock speed up for a second, almost like a rattle.
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Old 08-10-2013, 08:21 PM   #2 (permalink)
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Default Re: engine noise

strange... can you tell where its general area is?

maybe lay your hands on it to try to see if you can feel it...
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Old 08-10-2013, 08:54 PM   #3 (permalink)
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Default Re: engine noise

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Originally Posted by Spankytaco View Post
strange... can you tell where its general area is?

maybe lay your hands on it to try to see if you can feel it...
It literally sounds the same in the car and under the car, I cant tell if its top end, bottom end, or something around the cam sprockets I guess the next step is to drain the oil and see if there is anything on my magnetic drain plug, if not Im pulling my valve covers off.
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Old 08-10-2013, 08:55 PM   #4 (permalink)
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Default Re: engine noise

Ive got a similar noise that I cant pinpoint. going to look at it Thursday and see what I can find, Im suspecting a pulley or lifter, just not sure which one.
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Old 08-10-2013, 09:02 PM   #5 (permalink)
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Ive got a similar noise that I cant pinpoint. going to look at it Thursday and see what I can find, Im suspecting a pulley or lifter, just not sure which one.
I have 3rd gen lifters and it sounds to random to be a lifter......but im not eliminating that possibility.
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Old 08-10-2013, 09:06 PM   #6 (permalink)
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Default Re: engine noise

if it was a lifter i would be constant.

i had an idler pulley go out on my explorer... kinda sounded similar.

have you seen if the noise changes with the ac on.... maybe a slight rev? if its a bearing... aint no saving it ya know... but it doesnt sound like it to me.
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Old 08-10-2013, 09:11 PM   #7 (permalink)
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Default Re: engine noise

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Originally Posted by Spankytaco View Post
if it was a lifter i would be constant.

i had an idler pulley go out on my explorer... kinda sounded similar.

have you seen if the noise changes with the ac on.... maybe a slight rev? if its a bearing... aint no saving it ya know... but it doesnt sound like it to me.
Ill try the ac idea, I tried pulling one spark plug at a time to see if the noise would go away if I killed that cylinder, no change.
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Old 08-10-2013, 09:46 PM   #8 (permalink)
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Default Re: engine noise

I also have 3rd gen lifters, which is why im not looking at them first. my noise seems to be more constant, coming from the front drivers corner (from what little I have looked into it), and varies with RPM.
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Old 08-10-2013, 10:28 PM   #9 (permalink)
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Default Re: engine noise

just drained the oil. There is a small amount of metal on the drain plug but this is about the amount I usually see and considering the heads where off recently I wouldnt think this is enough to be alarming. The magnet is very strong so if I had a spun bearing I would think there would be more to see. What do you guys think, is this typical?

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Old 08-10-2013, 11:41 PM   #10 (permalink)
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Default Re: engine noise

IIRC bearings are not magnetic so that doesn't really tell you much, unfortunately.
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