BMW E46 Bad Idler Pulley

[CrashBandikoot7]

So if the car is making this sound I should replace the idler and tensioner pulleys?

[XionUnjust]

@CrashBandikoot7 You have to take the belts off and spin each pulley to see which one it is.

[CrashBandikoot7]

@XionUnjust Can an alternator be making these kind of sounds too?

[XionUnjust]

@CrashBandikoot7 Possible, but I rarely hear of it.

[frosty9595]

Bmws seam to always have some little thing go wrong

[pater429]

AHHHHH MY EYES, TURN IT OFF

[thorfoxxx]

so how do you fix this... my 98 528i (e39) makes a sound like this when in neutral or just stopped but more of a chirp at idle and ive been to several mechanics and they all told me different things like the vacuum seal or power steering pump or alternator.. i replaced the tensioner pulley but the chirping is still the same... someone help me out please

[XionUnjust]

@thorfoxxx Replaced the idler pulley. It costs around $15-20 for my car. Easy DIY

[thorfoxxx]

@XionUnjust its a loud chirp at idle, it doesnt really sound like this... i have a feeling it is the water pump... its coming from right around the alternator

[XionUnjust]

@thorfoxxx If you can,you can take out the belts and spin each pulley to see which one it is

[Xbow361]

@XionUnjust lucky you mine cost me 75$

[XionUnjust]

@Xbow361 For what car?

[Xbow361]

@XionUnjust my 98 cadillac eldorado

[olaf2046]

hey that is the same sound my car made before my idler pulley exploded in my engine bay

[XionUnjust]

@olaf2046 rofl

[orstho1]

the bearing of generator?!

[XionUnjust]

@orstho1 It was the idler pulley

[silviubmw323]

lights on ...nobody home...

[SM3GTASTIC]

Could it be the DISA adjuster valve?

[XionUnjust]

No, the DISA would make a rattle sound and it is not close to where the sound was coming from. It ended up being the idler pulley.

[petroidau]

Is it that knocking sound? Cause mine is making a similar noise. Suspected pulley, going in on wednesday.

[brownbear5258]

was ur car idling weird because i am tryingn to figure out wats wrong with my engine let me know plz and ty

[XionUnjust]

it was idling perfect, it's just that noise that made it seem weird.

[lovemym16]

If you own a BMW and have not followed the manufactures service plan for engine sludge cleaning the engines tend to loose power and idle irradicly. BMW is infamous for an intolerance to sludge builup

[mujjuman]

did u ever fix it

[XionUnjust]

i had the tensioner replaced, didnt fix it. then i had the idler done and it was that.

[frostyowned]

Sounds like crap, get it fixed :)