High pitched peeping engine noise?

[Berggreen]

Hello,

I have noticed a high pitched peeping sound/noise from the engine for some time, which seems to get worse.

I have tried to make some videos while driving, where it can be heard. Hope you can hear it through the background normal engine sound.

https://www.dropbox.com/s/zw271ykhgkvds32/IMG_8725.MOV?dl=0

https://www.dropbox.com/s/b4gvkz1s6pxkzze/IMG_8726.MOV?dl=0

https://www.dropbox.com/s/aysdns81i54fc6o/IMG_8727.MOV?dl=0

What do you think it can be? A worn cam shaft or cam shaft bearing maybe? Or something else?

The car is a 1970 280SL, and the engine is a M130.981 with manual gearbox. Camshaft is an “05”.

Thanx,

Christian

[Cees Klumper]

Christian - it sounds to me like the alternator bearing going bad. Something external to the engine. Maybe take off the drive belt and check if the alternator bearing is making any noise when you spin it.

[Berggreen]

Christian - it sounds to me like the alternator bearing going bad. Something external to the engine. Maybe take off the drive belt and check if the alternator bearing is making any noise when you spin it.

Thanks Cees, I appreciate your input and suggestion.

Unfortunately, the sound/noise is not there when the engine is cold, but only when it reaches normal operating temperature.

Thus, it seems to follow the engine oil temperature, and this was why I was thinking of the camshaft or camshaft bearings. But just a guess......and I have no prior experience of which noise/sounds are associated with a worn camshaft or bearings. But maybe you or others have?

Cheers,

Christian

[ejboyd5]

Don't look for deep troubles where they may not exist. Remove the belt to see if the noise goes away.