Yanmar 3GM30F – Tapping/Ticking Noise at Idle

[JonathanCarlos]

Here is the most recent video with a variation of RPM.
Video Link
JC

 

[bsangs]

Here is the most recent video with a variation of RPM.
Video Link
JC

@JonathanCarlos - That really doesn't sound much different from mine. (Video was taken after belt, oil, impeller changes, which is why it pans to different areas.)

http://imgur.com/a/p6URQd4

 

[Pete the Cat]

I don't hear anything concerning--understanding that it is difficult to really discern any deep knock from my little speaker on this end. I assume you have checked all the valve clearances, but my diesel engine mentor, a really talented machinist, says he would rather hear a little valve noise than have a very quiet valve train that is producing friction and heat.