Can anybody tell me what is causing this sound? No cel, increases with rpm
- Thread starter delightskinned1
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suspects: power steering pump, ac compressor, alternator, or tensioner(s).
to help narrow it down
take off ac belt, start it up if noise is gone then that's your sign
if not then take off serpentine belt and spin the alternator/steering pump/tensioners by hand and see if you can hear which one is noisy.
if it is for sure none of those then next up would be water pump.
to help narrow it down
take off ac belt, start it up if noise is gone then that's your sign
if not then take off serpentine belt and spin the alternator/steering pump/tensioners by hand and see if you can hear which one is noisy.
if it is for sure none of those then next up would be water pump.
Mrsteef
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If the ac is on in the video that would be my first suspect. Try with the ac off then go from there like Doyoubelieve stated
YukonandtheHOE
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Intake leak? Sounds like its reeding maybe a loose spark plug, sounds like it goes with engine stroke to me
davidzog
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It doesn't sound like power steering....that would be more of a whineing sound.
It sounds like (from the video) it is either the tensioner bearing or the bearing in the other belt roller....
Alternator generally makes more of a grinding sound.
I'd take off the A/C belt and run the engine....if that doesn't solve the problem, I would just replace both the idler and the tensioner....fairly cheap parts.
It sounds like (from the video) it is either the tensioner bearing or the bearing in the other belt roller....
Alternator generally makes more of a grinding sound.
I'd take off the A/C belt and run the engine....if that doesn't solve the problem, I would just replace both the idler and the tensioner....fairly cheap parts.
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delightskinned1
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I checked with the AC off in the cab ( but not with the belt itself off ) and still got the sound, Tried spinning the tensioner and idler pulley by hand this morning as well as the alternator but didn't seem to me like they made any sounds and felt like they spun freely. I did have the water pump replaced recently about 1.5-2 years ago but not many miles on it since as it's not a daily driver. when I get a chance I'll try taking the belt off the ac compressor but it seems like the sound is coming from up higher.
Erickk120
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I have a similar noise on mine, but it seems to only happen when its cold, I still haven't figured it out to this day since I never thought much of it til the winter comes and I park after driving for a while. Does yours happen when cold or is it constant all the time?
Seems to get closer after second 8 in the video but I might be crazy
Seems to get closer after second 8 in the video but I might be crazy
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delightskinned1
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Actually, It didnt even start until recently when It got a little colder around here, before that it was relatively quiet for a 11 year old engine. I like to try to figure these things out myself without having to go to a garage, but at the same time I hate throwing money at things unless I know exactly where its coming from.
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thompsoj22
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spray some of that anti slip belt dressing on the both sides of the serpentine belt as grooved drives alt,pwr steer and smooth drives waterpump. it does resemble a freaky intake leak sound so look at all the vacume plumbing under the top engine cover. i say it's the serpentine slipping on alt or waterpump. especially if it only does it at idle.
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delightskinned1
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I noticed yesterday as well that when I first started the engine I did not hear the sound as I went out to spray water on the belt to test it, but after about 30 seconds of me revving it up to about 2K that the noise returned and spraying the water didn't change the sound.
iamdub
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Removing the belt and spinning all the pulleys by hand isn't always going to pinpoint or rule out a particular pulley. With the belt off, all the bearings in the pulleys, alternator, water pump, etc. aren't loaded any more and you can't replicate that by hand.
I bet with a mechanic's stethoscope ($4 at Harbor Freight), you'd pinpoint the source in less than two minutes.
Just to throw out a guess, it sounds like a water pump bearing.
I bet with a mechanic's stethoscope ($4 at Harbor Freight), you'd pinpoint the source in less than two minutes.
Just to throw out a guess, it sounds like a water pump bearing.
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delightskinned1
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tried the belt dressing stuff as I had to run to the store anyway and they had it, did not help in fact on top of the sound I got a bunch of squealing for about 5 miles. gonna run to harbour freight and grab one of the stethoscopes as I couldn't pin point it using a screwdriver, Water Pump was replaced 8/2016 Id hate to have to replace it again so soon.
RichardCranium
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Belt spray stuff is a joke, and will only temporarily fix it. Stethoscope made for the auto world is a good tool, but if its coming from a pulley or a tensioner its going to be hard to get good placement to find the source. As loud as the noise is, its going to be VERY loud in a stethoscope too. The sound is clearly rotational, I would suspect a tensioner before anything. It might be easier to put a ratchet with an extension and a socket on your tensioner nut (where you put a ratchet to release the tensioner itself to remove/replace the belt), and I would try adding or relieving the pressure slightly to see if it goes away.
Obviously you are going to need to be very careful, since you are going to need to do this with the engine running. You'll lose a finger in the blink of an eye, so if you don't feel comfortable it might be worth taking somewhere.
Obviously you are going to need to be very careful, since you are going to need to do this with the engine running. You'll lose a finger in the blink of an eye, so if you don't feel comfortable it might be worth taking somewhere.
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delightskinned1
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I'll give that a try with the tensioner seems pretty straightforward, however the sound does not seem to start until the engine gets warm before that it sounds normal. Would the tensioner be affected by cold morning weather as this just recently started happening as the temps started to drop around here?
swathdiver
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+2 ^^^
Before these were invented, we took a long extension and stuck one end in our ear and touched the other end to suspected parts. You're thinking about this too much.
RichardCranium
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Yes, the tensioner can certainly be affected by temperature.
Still a valid method, and widely used.
thompsoj22
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Sorry for the belt dressing not working, but the fact that the squealing got ugly and continued for 5 miles may be the effect of your tensioner not applying enough belt tension to drive the alternator load and spraying the belt stuff made it worse. i swear this should be a simple fix. ok what i would do but am not advising you to do is while the engine is running put a 15mm wrench on the tensioner pully bolt and apply some pressure to see if you can stop the squealing. understand you are applying a loosening tq to the bolt itself so dont over do it. i think if a waterpump bearing were making that much noise you should see some fluid out the weephole? Uh yea what the previous post advised, didnt highjack, just similar thoughts.
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delightskinned1
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No worries man! the dressing was only like 3 bucks and it's something I would of tried anyway as I was checking options off the list... I truly appreciate the input from everyone, I got the stethoscope but it's been raining the last two days but it's my first thing on my to do list tomorrow... Thanks everyone
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intheburbs
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I guess the first thing I would have done would be to remove the serpentine and run the engine without it, to confirm that the noise is coming from one of the pulley bearings.
You should be able to zero in on it with the stethescope. My money is on the water pump or tensioner pulley.
You should be able to zero in on it with the stethescope. My money is on the water pump or tensioner pulley.
I would go by a muffler shop and ask one of the guys that works there if they can pinpoint where the noise is coming from there pretty good at that stuff
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