I Hate Odd Noises

[ace305]

I have a 2001 Bullitt. I get this vibration/grown when taking off in first normally. cant seem to figure it out. New struts, springs, rotors, brakes, wheel hubs. the sound last a second. only at certain rpm. almost like the car has to hit a certain vibration from accelerating before it happens. only hear it on acceleration.

are there any points I could grease or lubricate ?

thanks

 

[DSG_Mach]

Could be bad motor mounts, or unbalanced driveshaft. Is it automatic or standard?

 

[ace305]

Could be bad motor mounts, or unbalanced driveshaft. Is it automatic or standard?

hey is a standard. how to check for bad motor mount and unbalanced drive shaft?

thanks for the reply

 

[DSG_Mach]

hey is a standard. how to check for bad motor mount and unbalanced drive shaft?

thanks for the reply

Bad motor mounts would have the motor shaking around a lot more than normal but if they were bad I would imagine you would notice it when driving at any speed. The driveshaft you can go to a shop and have them balance it for you. A unbalanced driveshaft would cause noticeable vibration but I could be wrong.

 

[rlauzon]

What are the chances of it being an un balanced shat? what would cause the shaft to go out of balance?

 

[ace305]

thanks everyone. Its actually not a vibration issue that i feel, its more like something vibrating causing a sound.

 

[ace305]

Could it be a bad lower ball joint? the boots are torn. I purchased the car used. No telling how long its been torn. can ball joints make noises other than "clunking sounds" ?

 

[Neuron]

Most of the time you can check mounts by a visual inspection, have also put a piece of wood under the pan and gently tried to raise the engine/trans. and watching the mounts(usually separation of the rubber from the steel).

 

[Mattstang04]

Ball joints can make a metallic squeaky sound but its more a turning thing than an acceleration or rpm thing.

Maybe not the whole drive shaft but the u joints could also be shot.

 

[ace305]

FOUND IT! its in the rear passenger brake. When I go supper slow it sounds like its a warped rotor. gets loud than goes away gets loud then goes away. if I pull the emergency brake a little it shuts up. the rotors are brand new. any advice?

thanks

 

[Neuron]

I would look it over and if nothing obvious I would trade it with the other side's rotor and see what happens.

 

[ace305]

should I had a grease to back of pads? its a vibration hummm sound.

 

[General karthief]

Do not grease the back of the pads, you can try spray'n the back of the pad with blue brake anti squeel stuff but most pads now have a anti squeek pad built in, swapping the rotors is a good idea too, see if the sound follows the rotor.

 

[ace305]

Awesome thanks. the pads do have the anit squeel pad on it. I will swap them around and see if that helps. thanks everyone for the advice