Passat (B6) :: 3.6 - Rhythmic Knock Coming From The Motor
May 14, 2010
I recently bought a 2007 Passat 3.6 and am now noticing an odd sound from the motor. When I am at parking lot speed, just barely giving it gas (1000 RPM or so) I can hear a dull, almost rhythmic knock coming from the motor. It's similar to an exhaust "lub-dub" sound, but not. I brought it to the dealer under it's bumper to bumper warranty and they told me that it is a normal sound for the vehicle "in this configuration". Is this really normal?? I'm worried that it isn't, and just about the time I'm out of warranty it'll be a big deal. The car has 32K on it and the engine has 20K. Yep...it blew and was completely replaced at 11K.
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I have a 2003 passat. I have noticed, and its getting gradually worse, a knock that comes from the dash. I get one knock when I go round a corner and then a similar knock when I go round an opposite corner. Its as if something is rocking from side to side.
It sounds like its coming from behind the dash just off center to the left. Perhaps behind the passenger airbag? Its difficult to tell exactly.
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I bought a 2002 W8 92k Miles from a dealer for a very cheap price, KBB 9k, i paid 2k because there was a engine knock *gasp* i know. The body/interior is in good shape. From what I was told the noise was coming from the 'upper' part of the engine..I was hoping it was probably a bad lifter, not a big problem. So the car was trucked to me yesterday, it drives fine still but the engine noise was more severe than i thought. I'm 95% sure it's a spun rod bearing. I'm stressing .
I own a 2 ton gray monument. I cant spend that much money right now on just an engine and a rebuild might be just as expensive. I'm hoping (I need to stop that) that maybe i can drop the oil pan, inspect/remove the rod caps and maybe replace the bearings or push the pistons out the top. In my mind I know the crankshaft was probably scared too but im keeping my hopes high that it wasnt. If thats the case then the whole engine will need to be removed.
I know it not a good idea to buy a car with a knock but that was the condition or the purchase. I want to atleast try to get an idea of the work needed before considering parting it out.
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There is this *knocking* sound everytime i hit the brake. I don't know what it is?
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It only seems to happen every few days. I have noticed it when I come to a stop, then I hear a repetitive knock coming from under the front passenger side of the car. knock, knock... 7 times, in rhythm, not decreasing in volume, then it stops. Kind of like a gnome trying to get in from under the car... It does not sound like something is flapping or swinging as the knocks are consistent, it sounds mechanical in nature. The car is at the dealer right now for that and other things but they cannot get it to make that noise.
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Very annoying noise I have on the rear left wheel of my 2001 Hyundai accent. About a year ago I noticed a rhythmic noise coming from the rear left wheel of my car. I figured the car had done around 130K kms and was probably needing new bearing assemblies. This didn't fix the noise. So I thought maybe it was the struts or the wheels. Not either of those.. changed the struts and got the wheels balanced.
I changed the rear brakes shoes.. didn't work. So a few months went by and I figured I would try and get the drums machined. So I got them skimmed slightly but this did nothing. Finally I decided to that maybe the bearing was dodgy so I put a new on... and you guessed it.. The noise is still there.
The noise is always present whether I am braking or not. As I speed up the noise is more prevalent. Basically the noise is related to the rotation of the wheel. My next plan of attack is to put new brake shoes on with new brake drums. I don't know what else I can try.
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I have a 2002 Suburban 1500, 4wd, 5.7, auto trans. 214,000 miles. Transmission had a complete rebuild in August 2015. Last few days when driving slowly (5 mph) there is a rhythmic clicking or ticking noise coming from the center of the vehicle, best I can tell with my limited hearing. Noise is variable with car speed. With rear axle on jack stands in gear and idling, and my kubota backed up to it for safety ,sound is still there. All U joints appear to be fine, they are tight and there is no sign of fresh rust at the bearing caps. All axle boots are fine, no holes or anything else. I originally thought front hub assembly but the jack stand test rules that out. Not sure what the heck it could be.
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Car is approaching 100,000 miles. While driving today I noticed a rhythmic hiss coming from the dash when the AC ran. No temperature difference between AC and vent after a little while. Is there anything I can look for before I take it into the shop? I will take it in and have them put die in to find potential leak before we start with the more expensive repairs, but would like to save where I can.
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Yesterday night I bought my first Prius--a brand new 2015 C2. All seemed perfectly fine till I was driving home from work this evening. I had the passenger window down and noticed a rhythmic clicking and clattering coming from that side anytime I drove past something to echo it back. This was going at about 25 mph in a residential area. It almost sounded like when you have some gravel stuck in the tire, except no gravel and it sounded more mechanical. It was very noticeable. No sound at all coming from the driver's side open window. I took it back out for a couple more drives to confirm that the sound was continuing.
When I drove it off the lot yesterday it had 40 miles on it--the dealer said someone had likely taken it home to show a family member, then brought it back. I truly don't remember hearing a sound like this when I test drove it, but the conditions were very different (other people in the car, window rolled up). I didn't notice this sound this morning, either.
The thing that is extra concerning to me is that on the way home tonight there was some roadwork where the pavement had been stripped from a section, then a large bump where the regular pavement resumed. I slowed down as much as traffic around me but still hit the bump much harder than I would have liked, especially for my brand new car. It was after that that I first noticed the rattling, a little ways down the road.
The car is making so many new-to-me sounds that I truly have no idea if this is just a normal sound or if I should be concerned. The tires look ok, I don't see anything obviously wrong when I look under the car.
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I need to determine what this sound is. We just got an 07 Certified Pre-Owned Passat with about 30k miles on it. We've noticed a pulsing, rhythmic sound when going above 50mph. Some observations:
The sound starts literally at 50mph and is present at any speed above that.Sound is speed insensitive. It is a constant rhythm at any speed above 50mphSound is NOT present when in Park and revving the engine ( I think this rules out the turbo, not sure)Downshifting to 5th and 4th gear does not make the sound go away
I'll list some more if I think of any. I'm a noob with the 2.0T but have the tiptronic transmission in my MKV Rabbit and have never had any issue like this one.
Here's a video I recorded: [URL] ....
I suppose I should've started filming at 50mph, as opposed to a constant 80 in the video. The sound is the same though. You should be able to hear it starting in the first 10 seconds. The sound at 40 seconds is just me rolling down the windows.
Last week the breather valve was replaced because it got stuck and was making a whiney whistling sound. Dunno if that would be related.
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I have a 4.3l that has a loud knock/squeak in the motor. It would remind you of a spun bearing. But it has a little bit different sound.
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I've been hearing a rhythmic, metallic ringy grinding noise coming from the driver side front end of the car that seems to be in time with wheel rotation. It happens between 5 and 40mph, worsens while the steering wheel is turned even the slightest to the right, goes away completely during left turns, reduces and becomes intermittent above 45mph, and between 0 and 5mph, as I turn the wheel to the right from any position, I hear squeaking. I recently had the front control arm, ball joints and struts replaced. It has 140k miles. What could it be?
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2008 2wd 4.6L 98K miles F150 for the past few weeks has been humming with a rhythmic vibration which feels like it is coming from driver's side front wheel. It doesn't do it constantly, nor at all speeds. Once I hit about 25mph, you can start to hear a humming. At 35, slight vibration. Between 50-60, heavier vibration. Sometimes at 65+, it subsides quite a bit. Both front rotor assemblies are newer, and I put in a brand new left because I thought it was a bad bearing.
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I have a 99 Grand Marquis, I drive all week long in the city (check engine light dose not come on) but soon as I get on the interstate on the weekend the check engine light come on (codes 0171 @ 0174 ) . I also hear engine knock at certain times when the motor is under certain accel. conditions.
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The car is a 2.8L w/ a manual tranny. The car was making a rhythmic clunking and clicking noise around right hand turns on the left wheel. So when the weight of the vehicle is applied to the left, that's when the noise occurs. The car has been in the shop for 6 days and the technicians have replaced both axle shafts (it was time to do so anyway) but the noise is still there!!! What could possibly be making that noise other than bad CV's? The rhythm of the noise coincides with the rotation of the wheel/shaft which is where they have focused. Could it possibly be bad strut mounts? This is driving me crazy!!! They tell me its perfectly safe to drive (how do they know this when thy don't know whats wrong?) but I can't imagine this can carry on much longer without something breaking.
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2002 Subaru Forester I took my car to the Auto Zone to read a check engine code. It came back as being a "knock sensor". Besides that I needed a battery, and when the guy was putting it in he said my engine was moving too much and that I probably needed motor mounts.
I was looking at a discussion back in 2010 and the Subaru specialist told the person needing motor mounts is rare for a Subaru, is that true? I'm taking it to a mechanic, what should I expect? how many motor mounts does a subaru have?
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when the car has been driving for at least 20-30mins and you come to a stop (either lights or parking lot) as you release the brake pedal the rear knocks. it will also do this sometimes as you apply the brake and shifting from neutral to drive or reverse.
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After my coilover install there is a small knock coming from both sides in the front that wasn't there before..sounds and acts like a swaybar link but they don't have play and I replaced them and the noise is still there. I also reused the the shock tops?
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So every time I let off the gas pedal I get this knock coming from the front of the car.
No codes, I scanned it
mods -
stage 1 software
intake
downpipe
HPFP
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bought my car in 2008 with 19k already on it certified used. fast forward to 2012 and 102,000 miles on it engine has a knock coming from the engine block. I purchased a warranty 7/100,000 mile. Did oil changes myself every 5k full synthetic. when the car developed a knock i noticed the engine oil was scary low. Since i got my car from the time i got it at 19k and i bought the 7/100,000 mile warranty on top of that.
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So this just started happening last night and I haven't had time yet to get the car in a rack. There is now a fairly loud knock (changes frequency with speed) coming from under my right foot while coasting in gear. It does not affect steering, braking, handling (from what I can tell), or acceleration. The knock it not there while coasting in neutral. My concern is that it may be a mount that is loose.
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