Rattling while under acceleration
10-18-2005, 08:13 AM
#1
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Rattling while under acceleration
I understand that there's a timing chain as opposed to a belt so I'm also wondering if there is a tensioner or other pulley that would be at issue here.
It's an auto tranny T edition.
Here it goes: When under acceleration (light to heavy) I hear what sounds like a chain dragging the pavement. It is coming from the front passenger side (& there are no chains dragging the ground).
I've tried coasting along in neutral and don't hear it, I've tried revving it from the engine bay and don't hear it then either.
It seems to happen only accelerating under load in a drive gear and not while in gear and coasting.
I thought about valves too but it's not valves. I run 93 only and when I don't ...then, I occasionally hear valves.
I recently had both axles replaced and only began to notice it since then but it may have been happening before.
I've shaken the exhaust system around while hot & cold and can't locate the source. I've inspected the work (as best I can) of the axle replecement and can't see any issues but might know what to look for.
It runs fine and accelerates with no performance problem.
Thanks for your suggestions or experience.....
It's an auto tranny T edition.
Here it goes: When under acceleration (light to heavy) I hear what sounds like a chain dragging the pavement. It is coming from the front passenger side (& there are no chains dragging the ground).
I've tried coasting along in neutral and don't hear it, I've tried revving it from the engine bay and don't hear it then either.
It seems to happen only accelerating under load in a drive gear and not while in gear and coasting.
I thought about valves too but it's not valves. I run 93 only and when I don't ...then, I occasionally hear valves.
I recently had both axles replaced and only began to notice it since then but it may have been happening before.
I've shaken the exhaust system around while hot & cold and can't locate the source. I've inspected the work (as best I can) of the axle replecement and can't see any issues but might know what to look for.
It runs fine and accelerates with no performance problem.
Thanks for your suggestions or experience.....
10-18-2005, 12:02 PM
#2
Doubt its the t chain tensioner... if it was you would be hearing it all the time. My guess is that it is a valve clearance issue. How many miles do you have? If those shims in there are worn down, you could be getting a God awful amount of racket.
that sound can be comming out from inside the muffler, i have had similar situation, took me 2weeks to figure it out, but after changing the muffler the (dragging)sound went away
10-19-2005, 09:45 AM
#5
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I'd be very surprised if it is the muffler based on where it seems to come from but I'm open to the possibility. (!25K miles on the original muffler.) I'll have to take a ride with someone else driving and do the dog out the window routine to see what else I can tell.
I'll think about taking it in sometome soon and get it looked at for ideas too.
I'll think about taking it in sometome soon and get it looked at for ideas too.
10-19-2005, 11:23 AM
#6
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I know some of the newer VQ's have had some rattling caused by a loose heatshield on the exhaust, so that would be cheap and easy to check out.
You might be getting some knocking if it only occures under acceleration. I know you said you run 93, but it could also be ignition coils or maybe a faulty knock sensor.
I would imagine we have hydraulic lifters and if one or more of those was leaking (shouldn't happen till well after 100k) you might get some valve clatter, but the beginning stages of that usually only happen at or near idle.
Like DS said, how many miles are on your engine? Is there a general area you hear this from? Is there any kind of vibration associated with the sound?
You might be getting some knocking if it only occures under acceleration. I know you said you run 93, but it could also be ignition coils or maybe a faulty knock sensor.
I would imagine we have hydraulic lifters and if one or more of those was leaking (shouldn't happen till well after 100k) you might get some valve clatter, but the beginning stages of that usually only happen at or near idle.
Like DS said, how many miles are on your engine? Is there a general area you hear this from? Is there any kind of vibration associated with the sound?
10-20-2005, 09:43 AM
#7
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NewLove,
Thanks for the note. No vibration is present. It has 125K miles and the rattleing sound like it comes from the front passenger side. I hear it best with the pass. side window open, only while accelerating, light or heavy.
With either rate of acceleration, the rattle is the same in tone and volume. I do not think it has gotten worse since I first noticed it. The exhaust system is a plausable place to look at closely. Thanks again....
Thanks for the note. No vibration is present. It has 125K miles and the rattleing sound like it comes from the front passenger side. I hear it best with the pass. side window open, only while accelerating, light or heavy.
With either rate of acceleration, the rattle is the same in tone and volume. I do not think it has gotten worse since I first noticed it. The exhaust system is a plausable place to look at closely. Thanks again....
06-10-2006, 06:54 PM
#10
My old Sentra used to make a rattling sound on accelerating and now my Maxima is doing it after I've crossed 50K miles. It sounds like it could be the muffler...meaning the muffler needs to be changed?
Another thought was that it might be pinging. Can someone describe what pinging would sound like. Thanks.
Another thought was that it might be pinging. Can someone describe what pinging would sound like. Thanks.
06-12-2006, 10:25 PM
#11
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Join Date: May 2005
Posts: 202
Originally Posted by i30ds
Transmission is on the drivers side. If his location of the noise is indeed correct, then you are incorrect.
06-13-2006, 05:27 AM
#12
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Join Date: Nov 2004
Posts: 154
currently i have the same problem, a slight rattling under the car while acceleration, doesn't sound major but who knows, i think, i'm not sure what you call it, it's the piping for your muffler. It's the round thing that looks like a mesh right under the front seats.
06-13-2006, 05:41 AM
#13
Originally Posted by bi30
currently i have the same problem, a slight rattling under the car while acceleration, doesn't sound major but who knows, i think, i'm not sure what you call it, it's the piping for your muffler. It's the round thing that looks like a mesh right under the front seats.
06-13-2006, 05:59 AM
#14
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OMG! Slow down, transmission is an obvious choice, but before you throw your money away try cleaning your throttle body. I had similar problem. Rattling under acceleration around 2500-3000 rpm up the hill and on even pavement under heavier load. I was doing regular maintenance and decided to clean my throttle body. to my surprise, as a side effect I guess, the rattle has gone away, now I floor that ***** without any problems . So try that before anything else!
06-13-2006, 10:31 AM
#16
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06-13-2006, 10:38 AM
#17
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Since I started this post, it's gotten a little worse over the last few months. I'm also at 137K miles now.
I'm planning to do the TB clean out. There's a decent write up on it one one of these threads, but I have no idea where it is.
The rattle occurrs only under load, not at idle and quiets down a little after it's warm.
If the TB clean out doesn't do the trick, I'm thinking chain tensioner. I had another contributor offer that up as a strong possiblity and they appears knowledgable that it was the cause. They also seemed to indicate that the replacement of the tensioner was a simple process but there's more to take off and reassemble than I feel like doing.
Should the TB clean out not do the trick, I'm probably going to choose to be on the boat & let the shop assess the situation & handle it. (Always like to play around with the free loaners anyway.)
In any case, I'll let all know what the deal & damage was.
I'm planning to do the TB clean out. There's a decent write up on it one one of these threads, but I have no idea where it is.
The rattle occurrs only under load, not at idle and quiets down a little after it's warm.
If the TB clean out doesn't do the trick, I'm thinking chain tensioner. I had another contributor offer that up as a strong possiblity and they appears knowledgable that it was the cause. They also seemed to indicate that the replacement of the tensioner was a simple process but there's more to take off and reassemble than I feel like doing.
Should the TB clean out not do the trick, I'm probably going to choose to be on the boat & let the shop assess the situation & handle it. (Always like to play around with the free loaners anyway.)
In any case, I'll let all know what the deal & damage was.
06-13-2006, 12:00 PM
#19
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Fine. Here ya go. http://forums.maxima.org/showthread.php?t=474727
07-12-2006, 11:50 AM
#20
Originally Posted by Double E
Here it goes: When under acceleration (light to heavy) I hear what sounds like a chain dragging the pavement. It is coming from the front passenger side (& there are no chains dragging the ground).
I've tried coasting along in neutral and don't hear it, I've tried revving it from the engine bay and don't hear it then either.
It seems to happen only accelerating under load in a drive gear and not while in gear and coasting.
I've tried coasting along in neutral and don't hear it, I've tried revving it from the engine bay and don't hear it then either.
It seems to happen only accelerating under load in a drive gear and not while in gear and coasting.
07-12-2006, 12:15 PM
#21
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Join Date: Dec 2003
Posts: 350
Not pinging. I know what pinging is & this isn't it.
Unfortunately though, I still haven't been able to work on the issue yet.
I'll keep hacking away at making it happen soon though ...and will post back on the results.
Unfortunately though, I still haven't been able to work on the issue yet.
I'll keep hacking away at making it happen soon though ...and will post back on the results.
07-18-2006, 06:33 AM
#22
I have a similiar noise on my 2000 I30, additionally it has
the check engine light on. I had it diagnosed and it's the front cat. converter that needs to be replaced. Prior to this I used to have a very loud bangin noise on the car when it drove over holes. Almost 1500.00 later and 3-4 mnths I had that issue resolved. REplaced an engine mount, replaced all four shocks and strut tower mounts which still didnt solve the problem. Turned out it was a small suspension part (cost about 40.00 at at the dealer) Also, remember that noise travels and though you may hear it coming from a particular location it may not ALWAYS be so.Good luck !
07-19-2006, 07:53 AM
#23
Originally Posted by Brudda Bob
the check engine light on. I had it diagnosed and it's the front cat. converter that needs to be replaced. Prior to this I used to have a very loud bangin noise on the car when it drove over holes. Almost 1500.00 later and 3-4 mnths I had that issue resolved. REplaced an engine mount, replaced all four shocks and strut tower mounts which still didnt solve the problem. Turned out it was a small suspension part (cost about 40.00 at at the dealer) Also, remember that noise travels and though you may hear it coming from a particular location it may not ALWAYS be so.Good luck !
So you say it was the front cat. converter...what exactly is making the front cat. make this bangin noise? Just old and rusted or what? What part did you buy for $40? Please elaborate some more...
07-24-2006, 12:10 PM
#24
Max,
It could be your b pipe banging around. My friend with a 96 had a muffler put on and the manner in which the shop welded the brackets onto the muffler made the b pipe sit in a way that it would bang around when ever he he drove over bumps.
It could be your b pipe banging around. My friend with a 96 had a muffler put on and the manner in which the shop welded the brackets onto the muffler made the b pipe sit in a way that it would bang around when ever he he drove over bumps.
07-27-2006, 09:18 AM
#26
Ah hah!! Finally, at last. It was a combination of things...
First off the rubber hangers were to big so the B pipe had plenty of room to pop up and down. Second, a screw came out from my rear passenger side bumper and that kept moving around, causing the license plate to rattle. Third, was loudest and hardest to find...my rear driver side brake pads were loose. The clip broke so there was a ton of play for them to slide back and forth against the rotor and so forth.
Now all I gott do is take care of my squeaky rear strut mounts that I got from Ben...
First off the rubber hangers were to big so the B pipe had plenty of room to pop up and down. Second, a screw came out from my rear passenger side bumper and that kept moving around, causing the license plate to rattle. Third, was loudest and hardest to find...my rear driver side brake pads were loose. The clip broke so there was a ton of play for them to slide back and forth against the rotor and so forth.
Now all I gott do is take care of my squeaky rear strut mounts that I got from Ben...
07-27-2006, 08:41 PM
#27
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Join Date: Jul 2006
Posts: 6
Hi
My I30 does a ratteling noise too when i go at 2000 RPMs and becomes progresivly faster when i go higher in the RPMs, this happens when i am driving but not when i am accelerating in neutral, please help.
P.S. i think it is the valves because it comes from the engine block
My I30 does a ratteling noise too when i go at 2000 RPMs and becomes progresivly faster when i go higher in the RPMs, this happens when i am driving but not when i am accelerating in neutral, please help.
P.S. i think it is the valves because it comes from the engine block
07-28-2006, 07:27 AM
#28
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Adria,
It does sound like valves in your case. Try a tank full o' 93-94 and some injector cleaner (Techron is great) and see what difference you get.
Mine is still the same as the original posting & I still have not had chance to address it. I do know that it isn't a loose exterior item on the car but I have yet to fully investigate. (I always run 93 or 94 octane & never have valve knock.)
It does sound like valves in your case. Try a tank full o' 93-94 and some injector cleaner (Techron is great) and see what difference you get.
Mine is still the same as the original posting & I still have not had chance to address it. I do know that it isn't a loose exterior item on the car but I have yet to fully investigate. (I always run 93 or 94 octane & never have valve knock.)
07-29-2006, 01:56 PM
#29
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Thank You "Double E"
I did try the Injector cleaner and it doesn't make a lot of difference, and i do use 92-93 octane. In case it is the Valves how expensive would it be?
My SES light just came on and i checked it and was a O2 Sensor and MAF sensor ill change them and hope that was the problem.
I did try the Injector cleaner and it doesn't make a lot of difference, and i do use 92-93 octane. In case it is the Valves how expensive would it be?
My SES light just came on and i checked it and was a O2 Sensor and MAF sensor ill change them and hope that was the problem.
07-29-2006, 06:37 PM
#30
If it really was valve lash (I doubt it is unless you got like 200k+ on your engine) new shims would have to be installed in the valve train (because the old shims are worn), and I have never seen any one on this site have to do this to their VQ. Expect it to cost over $1000 from any reputable shop.
My guess is that your issue is something else as valves don't really rattle they more or less click or tick with a kind of flutter noise added in. Plus with valve lash noise, you can always hear it... at idle is best. You could have an exhaust heat shield loose or something. You're going to have to get creative an find the source.
My guess is that your issue is something else as valves don't really rattle they more or less click or tick with a kind of flutter noise added in. Plus with valve lash noise, you can always hear it... at idle is best. You could have an exhaust heat shield loose or something. You're going to have to get creative an find the source.
07-31-2006, 09:48 AM
#33
Don't piggy back again.
You just have to get to 15 posts to make a new thread. Go check out some other posts, make a postive comment or two, maybe help someone else out with their problem... its not that hard.
You just have to get to 15 posts to make a new thread. Go check out some other posts, make a postive comment or two, maybe help someone else out with their problem... its not that hard.
08-01-2006, 11:19 PM
#37
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Join Date: Sep 2005
Posts: 29
I have the same problem Double E has on my 02 I35 with only 40k miles... =(
The sound is not very noticable, and only occurs randomly. Any updates on this issue? Is hard to believe it is the values with this mileage when I use 92/93 and the muffler should last longer..?
Should I check with dealer and see if it is a "known" issue? I still have warranty... will keep you posted but suggestions needed.
The sound is not very noticable, and only occurs randomly. Any updates on this issue? Is hard to believe it is the values with this mileage when I use 92/93 and the muffler should last longer..?
Should I check with dealer and see if it is a "known" issue? I still have warranty... will keep you posted but suggestions needed.
08-02-2006, 04:44 AM
#38
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I would grab more info before letting the dealer have it.
For example, take notice of when it happens at randon...cold starts, warm starts or doesn't matter.
Only happens when engine is starting out under load or while driving and in an auto-downshift situation to accelerate...or doesn't matter.
If it all points to "doesn't matter" and it's that random, I would seek out times when it does happen and try to repeat it on the same patch of road and start narrowing down locations to check...or suggest to the service writer.
(Odd that perhaps I'm getting used to it on mine ...or it's getting better, but I don't think I have as much rattling going on anymore.) I'm still going to have to take it in for a once over anyway. I wanted to play with a dealer demo for the day anyway.
For example, take notice of when it happens at randon...cold starts, warm starts or doesn't matter.
Only happens when engine is starting out under load or while driving and in an auto-downshift situation to accelerate...or doesn't matter.
If it all points to "doesn't matter" and it's that random, I would seek out times when it does happen and try to repeat it on the same patch of road and start narrowing down locations to check...or suggest to the service writer.
(Odd that perhaps I'm getting used to it on mine ...or it's getting better, but I don't think I have as much rattling going on anymore.) I'm still going to have to take it in for a once over anyway. I wanted to play with a dealer demo for the day anyway.
08-02-2006, 11:25 AM
#40
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I would say barely noticeable. This morning on the way to work I had my full attention but did not hear it...
Engine sounds fine & smooth on cold starts and when reving in N. Sound usually comes on for ~ 5 seconds at most in motion and does not matter how hard I push... In fact, I think it happens most around 2000 - 2500 RPMs
I will try to reproduce it and let you all know.
Engine sounds fine & smooth on cold starts and when reving in N. Sound usually comes on for ~ 5 seconds at most in motion and does not matter how hard I push... In fact, I think it happens most around 2000 - 2500 RPMs
I will try to reproduce it and let you all know.