How does one detect timing chain tensioner noise?

[CTBMW]

I look at the post concerning this and the "posters" don't answer my questions, and there are no replies.
Any idea what thes guys hear? What should I listen for? Should I be on crack too?
-Mel

 

[outperformit 36]

Stand infront of the motor. the tensioner is at the front of the block to the left where the timing chain
meets up with the camshaft. Some people hear a noise and automatically think its the tensioner when almost
the same sound can come from the tappets.
Ive heard that the tensioner in a 95 325i is plastic and over a period of time without running the tensioner
will dry out, causing it to become a problem.

 

[Big Daddy]

I have a 91 318is and upon startup it makes a noise similar to tappets, however as the engine warms up the noise goes away. I was told by BMW and others that this is normal and is the timing chain system. The car has made this noise since it was new. I was also told that if the noise fails to go away after warmup you need a timing chain, tensioner, and/or timing chain rails. If I had to replace any I would repalce all.

 

[CTBMW]

Thanks, you all know me by now. Easily confused.
I really appreciate the support-Great Site!
-Mel