LeSabre :: V6 With Automatic Transmission - Loud Knock Noise In Engine Area
Sep 28, 2014
1987 Buick LeSabre V6 w/automatic transmission. Suddenly getting a fairly loud "knock" from somewhere in the engine area. Only present at low rpm or idle, goes away at higher rpm's. Does not seem to be related to vehicle movement. "May" change some with gear shifting but can not really tell. Oil is full and no "idiot" light warning. Timing belt recently changed. Car seems to run fine, just making noise. Any clues???
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As I accelerate, there is a humming noise that comes from the transmission area of the car. It does not make the noise when I am in idle, nor if i put the transmission in neutral and rev the engine.
When driving slow the noise is very subtle. As I accelerate faster the noise gets louder. The noise becomes the loudest at 60 mph. Above 60 it seems to calm down some. The noise is like a constant, deep humming sound. The noise gets softer as I slow down and then is gone when at idle again. To me it seems related to the speed of the tire or the CV half shafts turning or something rubbing in the transmission as the car goes faster. However the sound doesn't change when the transmission shifts. It stays constant and only gets louder as I go faster and then softer as I slow down.
While driving and turning hard to the left the sounds almost disappears until the car straightens out again. I have replaced the struts on all four wheels and this seems to only have caused the sound to get louder. I have also inspected the CV joints. There doesn't seem to be any cracks or signs of wear to all 4 joints. And I repacked the bearings.
The only other things I can think of is the cv half shafts are actually bad and need to be replaced. Or the motor mounts are not aligned/worn out and need to be replaced. Or the kickdown band and low reverse band on the transmission need to be readjusted. Or the transmission is has a problem (however it doesn't slip when driving).
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Experienced this (Loud engine knock or rattle noise) regarding the service bulletin (T-SB-0010-12)? If so, did you take your vehicle in for service?
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My 2001 Corolla w/80k developing a considerably loud spark knock/engine pinging noise under acceleration. It throws no codes but pings like crazy and it never used to. It's happened gradual over a long period of time. I've cleaned the throttle body and have done all regular tune up items with no improvement. It doesn't ping at all on 93 octane, does some on 89 and terribly so on 87. Why is this? Does the 93 octane just act a a richer mixture of fuel to alleviate the ping? Should this sign point me in the direction that it's definately a lean issue causing the pinging?
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1999 LeSabre 3800 Series 2. AC works fine, no noise when in use.
When AC is shut off , we hear this loud , screeching , grinding , wailing , scrunching, high pitched noise.
Not sure what to check? Should I apply a lube to the belt,pulley, etc ....
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As I begin to accelerate a humming sound from the front of the car begins. The noise becomes more pronounced the faster I go. No additional noise is made when I brake or turn, nor does it appear to be any noise when I went in reverse. I made a 180 mile trip on Sunday with no problems, although I did travel at closer to 55mph than 65. The car has 170,000 miles on it and has had most of its scheduled maintenance performed.
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I have a 2007 Camry XLE with 30,000 miles on it purchased new.I stated it up the other day after setting all night it had a very loud knock in the engine I shut it off and had it towed to the dealership. They started it up and wanted to know what happened they said it sounded like a rod out. They keep it several days and ended up doing a top engine flush and then replaced the spark plugs. They said it was a carbon build up.I asked if they suggest any thing to keep this from happening and they said they do not recommend using any thing. I thought carbon deposits were supposed to be a thing of the past. Does this still happen.
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Passat (2012 3.6 SEL, 7500 mi) making a loud knock noise from the underside of the car. It happens, without fail, every time I pull it out of my garage, and often when I'm coming to a stop or pulling out of a parking spot, etc.
I have taken it to the dealer numerous times, only to have the "failed to replicate, operating as designed" on the service tag. The car has been in for so many other things, this is just another issue I mention to them every time. Since the other issues (aside from the rattles) have been fixed, I'll make this my primary concern...until something else wiggs out on the car.
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My engine light came on last November which was diagnosed as “fan clutch seized”. My automatic transmission’s coolant fan clutch was replaced. Since then and on more than one occasion while returning from skiing in the mountains, I will hear this loud whining sound coming from the transmission area. I only hear it when the car is de-accelerating and I have not been able to replicate it once I am out of the mountains and the outside temperature is warmer. Is this a faulty fan clutch issue?
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The wife drove the Excursion (V10) to work today and it ran normal and didn't have any loud noises coming from under the hood. When she started the engine to return home it immediately started knocking. This is not a ping, but a knock. Not a loud heavy knock, but much louder than a ping. It has a fast frequency, seems too fast to be a rod knocking. The frequency is similar to a valve issue, but the knock seems to be too heavy for lifters. Oil looks good. Just changed out 2 weeks ago. Truck is driven everyday.
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Problem that developed after our 03 xle got whacked by a Harley in the right front wheel. The repair shop changed out the spindle and wheel but we got it back with a loud humming noise over 40 mph. The shop said it was the axle shaft bearing and not related. I argued and the insurance company reluctantly agreed to replace the shaft,bearing, and housing. Got the car back and again, the same humming only less faint and obviously coming from the trans. Everyone is dodging responsibility and it looks like we are left to sort things out on our own. Figures. This car road perfectly prior to the accident. I can't find any online diagrams of the trans to see what the shaft fits into. Supposedly the shop is holding on to the old shaft, I was going to go and look at the end splines, I believe that's what it has.
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The engine of our 2003 Camry (4 cylinder, automatic) is making a loud rumbling noise when stationary, both in drive and in park. The rumbling can be heard and felt, especially via the brake pad, and it persists when the car is driving at below highway speeds.
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Sounds like its from the valve cover. is there any thing in there that can click loud. for exp timing chain tensioner maybe its old and the chain is loose. and reported cause and fixes. VWs are fun to drive and work on.
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My cousin has a 2011 honda civic ex A/T and when he lets off the gas his transmission makes a quick knock noise. It's not too loud but it's very noticeable. Shifts fine and everything. Also it sounds like he is forcing his transmission from park to reverse. We hear a lot of noises not so much grinding noises but a lot of movement I guess you could say. But it engages quick. Is this normal or should we take it in? I have had multiple people tell me it's all normal. But it doesn't sound normal to me.
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I have a high mileage Aviator - it currently has 162k+ ... I have owned it since 136k, and according to Lincoln's records the transmission was rebuilt/replaced shortly before that ... The truck has run well since we've owned it.
It has developed a noise that I originally thought was an engine problem (bottom end), but I got under it today and took a good listen and it sounds to me like it's coming from the top side of the transmission.
I recorded some sound: 4.6L dohc "rattle" from above transmission - YouTube .....
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I have a noise coming from what seems like the front windshield area. It sounds like when you have a balloon full of air and open a small hole and let it out. That loud squealing noise that it makes is basically exactly the same as the noise I am experiencing.
It happens when I'm going 70mph in high winds or over 80mph without high winds. And when it happens it's constant.
I talked to the dealership and they told me it's fine... mostly because it happens randomly and it's hard to replicate unless you go 90 it always happens but they obviously aren't going to test drive my car going 90mph to find the noise.
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A significant amount of engine oil was added to my automatic transmission line. I drove the car (2010 subaru forester) for about 10,000 miles. I noticed the transmission slipping. I brought it to the dealer. They found the engine oil in the transmission, flushed and replaced the fluid. The question is How badly is my transmission damage. The warrenty is now voided and I am afraid that I will need a new transmission fairly soon.
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I have a noise with my new (2.6k miles) 2000 Diesel F250 Crew Cab. When I make low speed, right turns while crossing any type of depression in the road I hear a loud knock as if the left shock is bottoming out. There's an intersection near my house with runoff depressions across the road, I almost always hear the noise when making that turn. I've occasionally heard it coming from the right side when making a left turn.
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My 02 Legacy with 185k suddenly developed a whining noise I believe from the transmission. The noise coincides with engine rpm. The noise lessens when the load is taken off the transmission when at cruising speed. The trans shifts perfect and the fluid doesn't look too bad.
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I did a lot of searching on this, but can't seem to come to a solid conclusion. I have a 01 VR6, When I put my air circulation (warm or cold, doesn't matter) to 1 or 2 on vent control, its fine. However, when i put it to 3 or 4, there is a LOUD kind of "whirring" type air noise that comes from the Passenger Glove Box area. I also feel a little bit of the vibration on the brake pad. Not sure what this is?....
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This time it's about my tranny. After putting on 034 motorsport track density mounts, this whining noise started coming apparent and it's pretty loud and it's coming from the tranny area. Not sure of the fact that the mounts are so stiff has anything to do with it, but here goes...
It's like a slight grinding/mechanical whine noise that happens only when in gear and under load. It gets louder as the speed/rpm's get higher and happens in every gear. Funny, but sounds like a mechanical supercharger whine that you'd get from a supercharged car. When the car is idling, there is nothing wrong/no noise.
Clutch is not slipping, power feels just like it did before, my clutch pedal doesn't get stuck nor is it hard to push down.
A few initial diagnoses from friends were that there is some sort of shaft play in the tranny or that it may very well be a synchro.
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