This time I think my timing chain guides are gone

[Xproplayer]

Sounds like a tambourine under the hood combined with a bit of occasional engine flicker where it very minutely lowers in rev and shakes for a second.

https://youtu.be/e1-yXiArHqc
https://youtu.be/-LIoznZmZvc

[purplecty]

I dont hear anything but your valve covers are leaking. Good excuse to open her up and take a peek...

[Xproplayer]

I dont hear anything but your valve covers are leaking. Good excuse to open her up and take a peek...

Mind going into a bit more detail? I'm no where near as knowledgeable as I should be for this car.

[purplecty]

Your driver side valve cover looks wet with oil?

[Xproplayer]

Your driver side valve cover looks wet with oil?

Hmm I never noticed that, it may have been like that for a while but I'm not sure honestly, the sun just went down so I can't quite see, thats just a gasket replacement correct?

[XAlt]

Sounds like a normal idle to me, maybe a loose belt?

[Xproplayer]

Sounds like a normal idle to me, maybe a loose belt?

Do you hear the tambourine sound in the 2nd video? its never made that loud of a noise before.

[psjr]

Take off the belt and see if there's still noise.

[Xproplayer]

Take off the belt and see if there's still noise.

I will try, I just moved so I have no tools at all right now have to pick something up.

[jclausen]

If it has the clicking clacking noise and it sounds like it is coming from the upper timing cover area it is probably the guide rails

[MrCi]

Sounds like tappets.

[Barvarian]

Yea i cant hear the video either (no sound) but one good tip to see if its timing guides failing is to drain the oil and take off oil pan and check if there are pieces of plastic.

Another tip is buying a mechanics stethoscope and see where the sound is coming from.

Also I dont think the lowering revs is a symptom of failing guides, at least not a common one. Id keep my suspicions open.


Sent from my iPhone using Tapatalk

[Xproplayer]

Sounds like tappets.

hmm did some reading here
http://www.meeknet.co.uk/e38/BMW_E38...sy_Tappets.htm
and here
http://www.meeknet.co.uk/e38/Tappets.htm

and my last job involved me driving for under 10 minutes to work twice per day for about 10 months, but that ended in july and I've since taken a road trip about 700 miles that I would assume would clear the air out, but I also use 5w30 oil (dealer pushed it on me) could this potentially be something to try? The air procedure or changing oil viscosity?

[Xproplayer]

took another video here after i had driven for a bit and the car was warmed up, the sound seems to be low in the engine maybe even the oil pan, with the hood open you can't hear it due to the overall engine sound, but with the hood closed it is definitely audible, took 2 more videos for the sound.

This video is a clear case of what I'm hearing:
https://youtu.be/EfDSuXtTXic
This video is with walking around and moving the phones location, seems to be loudest when I put it under the engine.
https://youtu.be/9ezoSTgaJWM

[Xproplayer]

Driven about 50 miles and the sound is still there planning on getting some tools to take the belts off and check if the sound is still there, so scared right now :c

[purplecty]

Definitely doesn't sound like chain guides to me...

[Xproplayer]

Definitely doesn't sound like chain guides to me...

that makes me very very happy, almost all other issues I'd be fine with but if those are gone it costs a ton of money and if left unchecked could destroy the engine. I think that if the sound is still there after taking the belts off I'll take it to a shop and ask for them to lift it up and use a mechanics stethoscope to attempt to locate the sound.

[racer2086]

Doesn't sound like chain guides from the videos. The chain guide noise is naaasty. That sounds like it may be a pulley.

Need to do some diagnosis to see if you can isolate it.

[cbtech]

mine sounded like what i am hearing and was my belt

[Xproplayer]

I'm fairly confident its not the chains now simply because I've driven a couple hundred miles and the engine hasn't imploded yet, the belt is new along with all the tensioners so It'll be frustrating if its one of those parts, I have the tools to take off the belts and I will do so early this week when I have some space to work with and hopefully isolate the sound.

[Xproplayer]

Haha well something with the a/c belt system exploded today, was driving along and the most foul screeching sound happened, popped the hood at saw a messed up belt panicked thinking it was the serpentine but turns out it was just the a/c belt, looks like the tensioner has lost a bolt at least, I cut out the belt so I could keep driving, I'll assess the damage tomorrow, hopefully just a lost bolt and not a seized compressor or tensioner as I have replaced both of those in the last 20k miles of the cars life.

[purplecty]

Did the noise go away?

[cbtech]

siezed pully?

[Xproplayer]

Heres what happened: http://www.bimmerforums.com/forum/sh...off&p=29482403

there are still some sounds in the car but not the tamborine, actually that sound went away a few days ago after some driving (Assuming the lose bolt would have caused a variety of sounds)

[cbtech]

mine sounded like that, my ac tensioner was lose(didn't adjust properly after doing guides), and my main belt was bad. noise was gone when done.sounded like a metallic rattle, hard to describe,but simular to your video