Volvo Penta Engine noise

[Donald]

I hear a faint ticking or chirping sound. Not sure what it is.

I touched a mechanics stethoscope to raw water pump, PS pump, alternator and idler and tensioner. Did not hear ticking or chirping sound.

The tensioner seemed to have a rougher bearing sound that the idler. I would have thought they would both sound similar. Maybe replace tensioner.

I have a short video but cannot get it uploaded as it's too large or wrong format or both

 

[Rand]

I have a short video but cannot get it uploaded as it's too large or wrong format or both

you have to upload it to youtube and post link

 

[Donald]

Ok, I think I got it uploaded to YouTube

 

[Rand]

First off nice video.. can actually hear sound. (not sarcasm)

sounds like some sort of belt or pulley noise to me. Good luck.

 

[andyd]

sounds like a rough bearing. Trouble with them is the"while you're in theres"

 

[tcp71]

It’s not crank speed or cam speed. Definitely belt drive noise. I would suspect the belt because it is a very low frequency. Greasy or contaminated spot on the belt would be my guess.

 

[Donald]

Being a boat engine the belt sat in one position for the winter. Maybe it will smooth out with more summer use.

 

[Donald]

Ok, I think I got it uploaded to YouTube

So already 1K views on YouTube. I mean it's not really that interesting. How many of the 1K are BITOG member? 5? 10?

 

[alarmguy]

Well, for me that noise used to bother me. I knew it wasn’t going to go away and you probably don’t hear it when you pick it up off idle.

Though your circumstance might be different than mine, eventually after a year or so I traced it to the raw water pick up pump on the Volvo engine.
It was easy to do because I noticed when lifting the engine cover eventually little drops of water started shooting up in the air.

It’s a pretty simple fix, but I got lazy and while the boat was being worked on for something else I told them to put a whole new pump in instead of rebuild kit.
I can’t remember the exact details of everything, but it was nice to have the engine back to a quiet state for lack of better words and no little droplets of water kicking around the engine compartment.
If I remember correctly, that noise started before any small leak was noticeable.

 

[Donald]

Well, for me that noise used to bother me. I knew it wasn’t going to go away and you probably don’t hear it when you pick it up off idle.

Though your circumstance might be different than mine, eventually after a year or so I traced it to the raw water pick up pump on the Volvo engine.
It was easy to do because I noticed when lifting the engine cover eventually little drops of water started shooting up in the air.

It’s a pretty simple fix, but I got lazy and while the boat was being worked on for something else I told them to put a whole new pump in instead of rebuild kit.
I can’t remember the exact details of everything, but it was nice to have the engine back to a quiet state for lack of better words and no little droplets of water kicking around the engine compartment.
If I remember correctly, that noise started before any small leak was noticeable.

Well I did probe the raw water pump and did not hear the noise with the mechanics stethoscope.

I did just pull the raw water pump, replaced the impeller and the seal and checked the bearing. The bearing felt and sounded fine.