Tiguan :: Metallic Rattle Between 2.4 To 3k RMPs Under Load
Feb 24, 2010
Getting a metallic rattling sound between 2.4 and 3k rpms under load? It can't be reproduced by just revving however, I can reproduce this easily while holding it in gear with the triptronic and accelerating in that rpm range. I want to say it sounds like a exhaust or heatshield rattle but it's coming from the front the car, like behind the firewall or directly below me. I took it to the dealer and of course, in a typical dealer fashion, they cannot hear it.
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I've been having a this rattling sound metallic type of rattle when I'm under load, meaning acceleration, on flat or hill side roads, then the sound goes, someone told me it can be the center shaft bearing..
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When accelerating up a steep grade the engine will ping (rattling metallic sound) when reaching a certain RPM, but stop pinging as I continue to push the accelerator down and increase the RPM. Should I be concerned? Could it be something else, loose exhaust heat shield or something? Or is this normal behavior for a gasoline engine? My old Honda Fit never had engine ping/knock that i can recall in its 200,000km of service running the same 87 octane gas.
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Problem description: A loud metallic rattling sound from under the car under moderate to heavy engine load, only when engine/exhaust is/are cold. It is noticeable from within the cabin with the windows rolled up and the sunroof closed. Crack a window or the sunroof and it's pretty loud. The first time I heard I, I thought "this is not good".
This is not an octane ping or valve train noise. It sounds like a coffee can with marbles being shaken in concert which what might be the rapping of a V8 engine's exhaust. I had a Sunbeam Tiger that rapped in the upper rpm ranges and this reminded me of that but instead of rapping, it shakes a can with marbles.
There has been much discussion and speculation as to what causes this. It does seem to occur only with late - 04 and up V8 Touaregs with the "sport" exhaust that replaced the "std"(?) exhaust used on the majority of the 04s.
Observation: I looked very closely at the heat shields, looking for ways they could rattle. On the passenger side (LHD), the heat shield has three main sections:
- Front: around/near the secondary cat (tightly secured)
- Rear: around/near the rear differential (tightly secured)
- Middle: between the two mentioned above (loosely secured)
The three sections overlap a little where they meet. It was very easy to tap on the middle shield and make a loud metallic sound. I put my finger between the two shields (where they meet) to isolate the two metal pieces and tapped again, and the noise was gone.
Theory: The harmonic resonance of the exhaust under load vibrates the middle heat shield and it rattles against the front and/or rear shields. As the shields heat up, they flex enough to provide clearance between each other and the noise goes away. This may be unique to the "sport" exhaust if (and I am only speculating) the heat shields were changed (in design or fitment) when they changed the exhaust.
Experiment: I tried a very simple experiment. I slightly bent the edges of the middle shield (~1/2 inch) where it was coming in contact with the front and rear shields. The allowed me to tap rather hard on any of the shields without them rattling against each other.
Result: I make the tweaks to the shields Sunday night. When I drove to work this morning, I put the transmission in sport mode and ran WOT until it shifted. Normally, I would have heard the sound (very loudly) but it was gone. No metallic sound. Not completely convinced, I repeated the experiment on the way home and, again, the sound was gone.
Summary: It was cool out when I was going to, and from, work (64F) and this would normally be the perfect set up for making the sound. I think that tweaking the heat shield has solved the noise on my Touareg. I am tempted to go back under there and pop-rivet a little brace between the shields so that they cannot rattle against each other again. On the other hand, I may just leave it be and do the pop-rivets if the noise comes back.
Anyway, I was excited to find a potential solution for my Touareg and wanted to share it will you all. I will post back after a while and report how it goes in the long term. Lastly, I really liked being able to put the air suspension in xtra-offroad and get under the car (easily) without using a jack....
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Starter driving this morning and heard what one could describe as a metallic rattle from somewhere at the front end: like a stone tossed in a can. Stopped and did a brief visual inspection but did not see anything. Shifted to N and revved the engine all quiet. Started driving faster, the sound went away. Found some old threads about brake pads rattling. could that be it?
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I have a 2012 Prius v 5. There's a metallic rattle sound coming from the drivers side under the car. (I think)
Happens only when going over sharp bumps and even road reflectors. Had this happen on my 2001 Highlander. Turned out to be incorrectly installed brake caliper. Needed new spring clips. Don't think this is the issue in the v. Have about 10k miles.
Can only hear the sound with drivers window down and while driving along a curb, k-rail or wall. What's up?
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I took my first road trip last weekend in my new-to-me 2010 Tiguan. At speeds over 70mph, there is a quite loud buzzing noise from the front of the roof area. It sounds like 2 pieces of metal are slapping together at a very high rate of speed. I can't for the life of me figure out what it could be. It is really, really annoying. So much so, that I may take another car for my NYC to Florida trip next month. I'd really like to take the Tiguan though...
I have the panoramic roof - it all seems tight and has no rattles whatsoever. There are no loose moldings, no gaps in the windshield molding. The roof rails appear to be tight, however the front of the right one is slightly raised off of the roof surface. I was going to try to tighten it somehow, but don't know how to even access the screws that hold it down.
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Hearing a "metallic knocking"-like sound coming from the pillar-area behind the driver and/or passenger seats? See this thread: [URL] ....
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I'm back with another question! My 2006 Prius now has 60,XXX miles and the other day while driving with the windows down, I was climbing a hill to my house and when the engine is at a certain RPM, there is a metallic sound that comes from under the car, but more in the front. You can't even hear it when the windows are up barley, but more when they are down, you can hear it, especially when you're beside a wall or guard rail and the sound can reverberate back.
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Ever since day one with my new MKVII GTI, there has been a consistent metallic (tinny - like the sound of someone shaking a soda can with the tab inside) coming from what seems like the passenger side footwells. This rattle can only be heard at low RPM. I can hear it most around 2,000 RPM, and I can force it to happen by applying light pressure to the gas peddle. I don't know if the rattle doesn't happen at higher RPM, or if I just can't hear it over the engine and the typical road noise. The rattle is pretty consistent in tempo.
I've done some research, but can't determine if it's the waste gate actuator, fuel lines, or something else. I'm new to maintaining cars properly and I'm not the most mechanically savvy person, but I want to learn. So, I haven't tried to locate the actuator because I don't know where to start and I haven't tried to "tie down" the fuel lines because I'm not comfortable doing this fix on my own.
I've taken the car to the dealership once, and I was told that the waste gate actuator doesn't even exist on the MKVII. Interestingly, two different techs told me this. They deny that the actuator is even real, much less causing any problems. I suppose it could also be the armrest, as some people say it tends to sound like it's coming from the passenger side.
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So on my new 2.0T Sonata I noticed a brief metallic rattle in the 2K-3K RPM range when you rev the throttle. I was very concerned.
The sales rep said it may be the heat shielding that is coming lose. He was concerned and said to bring it back when Service is open.
I just got back from the dealer: The service manager didn't know what it was but his tech said it was part of the turbo system, it's a 1/4 inch bar (parallel with the bumper) you can plainly see between the firewall and engine. He said what it did but I forgot to take notes.
I listened to another 2.0 Turbo Sonata on the lot and it has the exact same rattle when rev'd.
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just about a week ago, i've noticed this weird rattle coming from the front end, sounds metallic (maybe something is loose) but it only happens when I accelerate from 0-80km/h, but the sound isn't there if I slowly accelerate. Nothing seems to be wrong with how it runs, its just the sound that sounds horrible, like nails on a chalkboard.
Also, I've noticed the engine ticks really loud when it gets started. However, the sound goes away after a minute of idling.
There is about 19,000 kms on it and I got it in January .. I travel a lot maybe a little too much.. I want to take it in to the dealership, but I'm pretty far from it and would like to know what it could be before I take it anywhere to get fixed.
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2003 Dodge Caravan Sport has a metallic rattle near the alternator. It gets louder when it is in Drive or Reverse and you have your foot on the brake. Also, it gets even louder when having your foot on the brake in Drive or Reverse and the heat or air is on. My husband thought it was the power steering pump so we replaced that but it didn't fix it.
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Metallic rattle from behind the dash. Seems to happen when I am stopped at a light. rattle comes from behind the dash, doesn't matter if the fan is on or not. Sounds like a thin piece of metal if that sounds accurate.
Belt squeal. First thing in the morning, reversing out of the driveway and put in drive and I get a belt squeal from the engine. Adjust the tensioner or something else?
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Lately I've started having an intermittent metallic noise that has been bugging me. At first it occurred on long runs and sounded like it could have been the brakes or something similar. It is not too loud but is continuous, rather like gently rattling your set of keys.
It got steadily worse and I eventually tracked it down to the passenger seat. When I held the seat the metallic rattle stopped.
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Have an '07 with 117k miles so well out of warranty. There is a very pronounced metallic rattle coming from the rear of the cabin when going over moderate sized bumps or listening to audio at moderate levels. Did some troubleshooting and have narrowed the noise down to somewhere above the rear center of the headliner. If I press slightly upwards on the headliner at this location, the noise stops.
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2008 Sonata Limited.
When I accelerate from a stop there is a metallic rattling in the engine compartment. My best guess is that it is near the middle and near the firewall. Can't see much under the hood in this area.
The rattling stops after about 60km/h or so and does not happen at all during cruising otherwise.
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Just purchased a pristine 2011 GLS with very low mileage. The car is essentially mint (garaged + well cared for by previous owner), but has one, occasionally noticeable issue: once warmed up, a very loud metallic buzz/rattle noise is heard from the rear of the car, particularly under low RPM acceleration. I've had many cars in the past with similar noises, which all turned out to be loose heat-shields at various locations along the exhaust systems. With this in mind, I've felt all the heat-shields on my "new" car, and they all seem to be securely in place - though some (especially the rear one over the muffler) seem to be minimally supported by design, and could potentially be resonating with certain exhaust frequencies.
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On the December day my 2013 Prius Five model (hatchback with all the safety add ons, bigger wheels) turned 18 months old, i was on the way to have one of the freebie services. I heard a metallic rattle, seemingly coming from the back of the interior. It continues and I cannot find a source for it. I just read a thread about rattles in the 2011s. Not particularly comforting given what I spent on the car.
Is this something I could have the dealer chase under the warranty? (this is the first new car i ever bought in my 50 years of driving, so my familiarity with new car warranties is a little thin.)
My dealer has been pretty responsive -- swapping out an interior door panel as a freebie when the armrest portion separated from the lower portion and collapsed into the door.
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2008 F150 4x4 27000 mi There is an intermittent metallic /rattle sound (like marbles or a chain in a can) seems to be coming from front passenger side; sometimes on first acceleration , sometimes after turning a corner, sometimes after hitting a bump. Doesn't last more than a few seconds Had my mechanic friend look at it on hoist and no apparent loose parts in exhaust system or breaks; 1st noticed it last August ( 7000 miles ago) but it subsides and then reappears with no distinct pattern. best guess is a bad wheel bearing but it's never gotten any worse; other guess is transfer case/ chain problem but 4x4 use isn't much and it goes in and out of 4x4 mode with no problems.
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After driving our 2013 Passat for 215 miles, we noticed that there was a rattling noise coming from the left front wheel area but only at slow speeds (under 10 mph). The noise disappeared at higher speeds. Today, we took the car to the dealership but they could not find anything wrong.
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