Subject: Have you ever heard THIS SOUND inside your engine?
URL: http://www.bimmerfest.com/forums/sho....php?t=1181089

Nobody on Bimmerfest knows what is causing this noise and I can't use the
car until I figure out how to figure out what the noise is.

This only started after I did some work this weekend on the valve cover but
it sounds like someone left a socket inside the engine and it's bouncing
around somewhere.

I'm pretty sure I didn't leave anything inside where this sounds like it's
in the intake manifold but it's hard to figure out where it's coming from
as it's intermittent.

It sounds like it's coming from the top of the engine somehow but it's hard
to place where.

You should not need a login to read that thread and download the videos.
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730369&d=1513035084

Here's just an audio file:
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730353&d=1513034666

When you download them, remove the *pdf which I added so that the MP4 would
look like a PDF to the forum upload GUI.

I can't imagine what is making that noise which is why I'm asking you for
how to debug that noise. Thanks!

On Tue, 12 Dec 2017 04:36:26 -0000 (UTC), Arthur Wood wrote:

Subject: Have you ever heard THIS SOUND inside your engine?
URL: http://www.bimmerfest.com/forums/sho....php?t=1181089

Nobody on Bimmerfest knows what is causing this noise and I can't use the
car until I figure out how to figure out what the noise is.

This only started after I did some work this weekend on the valve cover but
it sounds like someone left a socket inside the engine and it's bouncing
around somewhere.

I'm pretty sure I didn't leave anything inside where this sounds like it's
in the intake manifold but it's hard to figure out where it's coming from
as it's intermittent.

It sounds like it's coming from the top of the engine somehow but it's hard
to place where.

You should not need a login to read that thread and download the videos.
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730369&d=1513035084

Here's just an audio file:
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730353&d=1513034666

When you download them, remove the *pdf which I added so that the MP4 would
look like a PDF to the forum upload GUI.

I can't imagine what is making that noise which is why I'm asking you for
how to debug that noise. Thanks!

The only time I've heard a similar noise is from crank throws hitting cam lobes.
It was when I rebuilt a 352 and reinstalled the spacer used for the old timing gear.
The new cast iron timing gear had the that spacer cast into the gear.
That allowed the cam to travel in the path of the throws.
It was intermittent until the cam bearings wiped.
Otherwise, your theory is as good as mine.

replying to Arthur Wood, Iggy wrote:
None of the links worked for me and my fiddling around with them. But, if it's
sounding like something's loose and damaging everything in its path, then
you'll have to get back in and re-do your valve cover work. Maybe a 3/8's to
1/4 ratchet reducer, short extension, hex bit, rolled-up tube of Threadlocker,
etc. got left behind. Even though it's a BMW, I can't imagine you accidently
and unknowingly created a problem...unless your valve cover work included
removing the PCV or slopping in RTV that clogged venting and the sound is
pressure blowing the seals.

--
for full context, visit https://www.homeownershub.com/mainte...a-1152886-.htm

In alt.home.repair, on Tue, 12 Dec 2017 04:36:26 -0000 (UTC), Arthur
Wood wrote:


You should not need a login to read that thread and download the videos.
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730369&d=1513035084

Here's just an audio file:
http://www.bimmerfest.com/forums/attachment.php?attachmentid=730353&d=1513034666

It's hard for me to tell what the sound is, so,

Any chance the thermostat went bad and the coolant is boiling?

replying to Arthur Wood, Iggy wrote:
Sorry in advance, I couldn't resist with a discussion so on point. I don't
know why anyone buys or even puts up with German crap. How many decades,
models and makes does it take. Truth about BMW e46 M54 engine
https://www.youtube.com/watch?v=Kn4ZnT5qPpo

--
for full context, visit https://www.homeownershub.com/mainte...a-1152886-.htm