I recently started hearing some squeeking sounds coming from my motor, more when it's cold, I think. Sounds like bearings going bad, and comes from the general vacility of the alternator, again, I think. :hmm:
If you have 30 seconds, take a quick look at the video I shot...its not great, but you can pick out the intermittant bearing grinding sound separate from the motor noise. Especially in the first 15-20 seconds, which is all you really need to watch.
does the noise increase when you give it gas? sounds like the water pump blade broke or a bad pulley or tensioner. Removing the belt and running the engine for a few seconds will determine this.
sounds like a pulley/bearing noise, i had a noise like that on a 2000 328i and it was a loose harmonic balancer. Easy way to check is take the belt off and run it, see if it still makes the noise if not then its one of your pulleys.
Some info:
- car has 65,552 miles on it
- changed belts very recently, @ 62,010, but didn't hear it after I did that work
- last oil change was with BMW Syn 5w-30 and new Mann filter, 3,220 miles ago, @ 62,332
JasonBimmer: put handle to my ear and touch blade to various housings, correct? Seen it, never actually did it myself.
I had the same problem... It was comig from main pulley, it was released. you have to remove your fan take off belts and check pulleys (shake). If pulleys are tight then problem is in your water pump...
If the pylleys are original,they should be changed by now.
Unplug thr disa in order to diagnose the problem better. If when you unplug the disa noise goes away then it was disa causing the rattle
I've heard of the infamous DISA valve but haven't messed with it. It's kinda hard to do that, to get to, right? Difficult positioning in top rear of motor if I remember correctly.
I just played the video again, now on my PC and it sounds more like a pulley then anything else.
Your car has 3 pulleys:
- one is called idler (its the most common and usually the first to go ) $30 from any online vendor
-Second one is called tensioner pulley (it puts tension n the main belt) $25 buys it. Its recommended to replace them at the same time
-last one is AC tensioner pulley (these pulleys dont usually go until 100k +) if you wish, you can replace it at the same time.
Also, DISA is not any difficult to do at all. If you are able to open your hood then you can replace your DISA , its that simple. First , you need to do some diagnosis.
Follow the video below to diagnose DISA noises, NOT my video
I don't mean to start a pissing match, but how do you figure the A/C pulley lasts longer than the rest? It's virtually the same part with the same diameter spinning at the same speed as the other two pulleys.
I'm surprised at the fact that nobody can be straightforward with their advice. (not talking about you in particular)
OP: Replace all three along w/ new belts. you need to do this anyway at this mileage. If you don't, that worn pulley (or any combination of the three) will throw your belts off and you can kiss your cooling system and quite possibly your motor goodbye.
Every component of the cooling system MUST be replaced by 60-75k miles or you're asking for trouble. You can get by possibly to 100k, but it's a guessing game and a ticking time bomb at best.
If you're a real cheapskate, you can skip out on the $150 radiator.
At the very least (if money is a concern) do the expansion tank, expansion tank cap, belts, and tensioners.
push it a step further and do the water pump, and thermostat.
push it further and do upper hose, lower hose, and sensor.
push it a step further and do water pump pulley and new radiator.
I did it all and won't have to worry for a very, very long time.
Wow, talk about timing! The same problem happened to my car the other day. I have an '06 325ci with approx 72,xxx miles. The noise came from the same area in your video. The speed of the noise increased along with the engine rev. The sound came from somewhere around the oil filter, powersteering reservoir, and intake manifold. Couldn't figure it out what it was. It eventually went away and haven't had the noise since.
Whether it's from the water pump, the alt, or an idler, there's no good way to tell until you pop the belt off and spin them by hand. The bad bearing will feel obvious. At that mileage I'd guess the tensioner or idler first.
or the deflection pulley. Not the water pump because the sound is so mechanical, and it would be muffled if it was in coolant. Could also be the alternator bearing, so don't rule that out just yet.
Take off the belts and rotate the three pulleys manually and see what you find. Should not feel mechanical like metal on metal.
Just because you'll have things open does not mean it's easy to do the pump. You'd still have to drain the coolant and refill, and do a thermostat. And your original pump is probably a metal impeller if it's a 2006. Probably lots of life in this left. Or if you're cool with the money, a Stewart pump gives everlasting peace of mind. (I did put one in myself because I cross the country with my car, far away from home and tools)
You kept typing Warner because Stewart-Warner is a big auto brand name.
Could also run one belt at a time to isolate the A/C from the rest.
With that much noise I'd not drive this car much more before a fix.
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