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circuitcah · 01-25-2025, 11:38 AM

Started as an intermittent ticking / knocking sound at idle and when accelerating from idle. Progressed into the loud squealing sound at all rpms (metal rubbing against metal sound).
After a while of the loud squealing and a small Ford dealership looking at it / running the engine the noise diminished and then went away. Seemed to be coming from the bellhousing area. Ford dealer in CO have it now and cannot find / recreate the issue.

Any experience / thoughts on the issue?

circuitcah · 01-25-2025, 11:42 AM

Adding WAV file of sound

circuitcah · 01-25-2025, 11:53 AM

Sorry... a little more info:

MY 2024 Entegra Odyssey 31F with about 13,700 miles. All gauges read normal and (other than the noise it was making) it drove/ operated normally.

circuitcah · 01-30-2025, 10:57 PM

No one has seen or heard of this one??

Deznut · 02-03-2025, 06:10 PM

1) does sound like metal to metal
2) 1st guess is pulleys - tension pulley bearing is bad/tension spring weak and there is pulley flanges rubbing against something - you can purchase a special long/thin wrench that is used to "unload" the tension pulley spring ( mechanics used them to replace serpentine belts) https://www.harborfreight.com/search...%20belt%20tool
to see if that is the issue.
3) Bad alternator bearing...the "alternator's fan" is rubbing against the alternator body
hth

CraigBounder · 02-05-2025, 03:53 PM

I get a squeal when it's cold and it stops once the engine is warm. To me it sounds like a fan belt squeal. Never happens in the summer, just when it gets below 50 degrees.

circuitcah · 02-06-2025, 07:26 PM

Thank you for the ideas. In the attached video, a tech was underneath the RV (transmission bellhousing area) and said it seemed to be coming from that area.

circuitcah · 02-06-2025, 07:28 PM

Servicing dealer has replaced the starter, but it never had trouble starting and they said the starter tested normal... so I doubt that was making this loud of a noise.

TeJay · 02-11-2025, 10:33 AM

I have never been a parts changer which is used to assist in diagnosing a noise. Often times the replacement part is charged to the owner which is not the best way to keep customers happy. There are other tricks. Here's one. When the noise is related to RPM's spraying one spinning part (pulley, bearing, etc) at a time may point to a specific part which is making the noise. An automotive stethoscope can be used to listen closer also helps to locate noises. Next spraying the serpentine belt will also effect the noise in different ways.

The serpentine belt goes around several pulley's. Look closely and you'll notice some pulley's are being run on the back or (smooth) side of the belt and others work on the tracked or drive side of the belt. The smooth side can't/won't drive the belt but the tracked side does. When a tracked or drive side is driving the belt it will/may make different noises/sounds.

The tension pulley is often a cause of belt and pulley noise. I'd change that pulley based on it's major function (belt tension) and age of your RV.