CCV? Sorry, this again... :-(
 

Was sitting at a drivethru recently with my window open, and heard a slight whine/whistle when I shifted into Park. Sounds like it's coming from underneath toward the front somewhere. Experimented a bit, when I shift into reverse, changes pitch a bit, and Nuetral and Drive I hear nothing. Can't hear it with windows close, very slight, barely noticeable. Any help/suggestions on this?

WOW, I can't believe its another CCV topic. Does your X5 shake when stopped (in gear or in neutral or in park)?
I'd say its a belt tensioner. under load it can disappear.

It could be the timing chain guides about to go, how many miles on your X?

There are 135K on the truck itself, but 95K on the used motor i put in it. Yes, I have plans to do a total timing chain and vanos overhaul in the spring.
The only time I feel shaking, actually more of a vibration, is when I'm in drive and come to a stop at a red light, stop sign, etc. If I shift into N, it disappears. That was my next question, is this normal? No shaking whatsoever, otherwise...

If it disappears when shifting out of gear (under drivetrain load) perhaps motor mounts or cv joints??

Dunno that's a weird one

If it only shakes in drive at a stoplight, and putting it in neutral stops the shaking, then it just sounds like the idle speed is too low. The drag of the transmission lowers it just enough for the rough idle to be perceptible.

Is this something I can adjust myself, or do I need to get my Indy to adjust my idle?

If it works like vw, the system self adjusts the idle based on other factors. Maybe the Icv or throttle body needs a cleaning. Then reset the throttle adaptation and it would be ok.

Again not sure if this is how the system works but how I understand it

Idle like everything else on a BMW is controlled by the Computer. Unlike carbs and early fuel injection systems where there was an idle screw to allow for adjustment, the idle is not adjustable.

You don't normally adjust it, but there are a myriad of things that can impact it, including vacuum leaks, idle control valve, etc.

I believe it can be adjusted using a service computer, but you shouldn't need to.

My 02 4.6is has the same issue. when its in park there's a hissing noise coming from underneath but when I put it into drive or neutral it goes away. Same with the rough idle at a stop but my chain guides were replaced at 106k and I'm now at 130k.

The V-8s don't have an ICV, but I think the 6cyl does.

As soon as it warms up a bit, I'll be using some elbow grease, taking things apart for inspection and cleaning, and looking into it a bit more. Thanks for all the suggestions...

What engine do you have?

If it vibrates in drive when held by the brakes it should do the same thing in reverse with the brakes on.

If it is hard to hear other than when the sound is bouncing off the building at a drive-through, I would check for a vacuum leak.

What are the idling RPMs in neutral and what is it in drive held by the brakes?

Does the sound rise and fall with engine RPMs or go away when it is above an idle?

My apologies, I thot my engine was in my sig, I have it updated now. 4.6... Sounds does not change with RPM increase. I will check my engine RPM's this eve after work, not exactly sure what they are.

Check my RPM's, they sit right around 600 when I'm stopped at a light or stop sign, and don't move, when I shift into N. Is this normal idling range?

Sounds exactly like my symptoms for my 3.0i a little over a year ago which turned out to be the ICV.

For your x tho I would probably start by looking at the easier stuff first like the PCV, throttle body, a vacuum leak, spark plugs, coils, intake boots, add some fuel injector cleaner, heck maybe even just sweet talk to your x haha

Hopefully its something easy. GL!

If the drive-through was next to a building it could be normal sounds bouncing back at you.

While the vibration and the whistling sound may be related, my suggestion is to see if you can pinpoint the source of the sound first.

With the tranny in park I would try to determine if the sound was coming from the transmission or somewhere under the hood. It will help if someone can shift into neutral and back to park so it comes and goes. If you can record the sound and provide a link or put it on youtube that would help. I get the impression it is not very loud, is that correct?

lol I spend quality time with her every day!! ;) I'll start going over the stuff you mentioned, and see what i can come up with. I'll do my best to get a video with some good sound....

BMW E53 X5 M62 4.6L Maintenance Engine Ignition ES#2593257 Ignition Service Kit - 12131703228KT1

Is this kit any good? Looking to do a tune-up, and a ccv change. Or will it be cheaper to just source parts separately?

Matt I would just do oem NGK plugs if I were you, coils I wouldn't touch unless they are misfiring after the plug chance.

I prefer NGK plugs over bosch personally.

Gotcha, RB, will do... Hopefully this will be a project I get done this week. We got dumped on with snow again today, so hopefully the weather co-operates with me...

:iagree: