Strange noise when hitting 65 Mph (not 88 Mph)

[Pascal]

When I hit 65-70 Mph a strange rattling noise occurs. To me it sounds if something is rattling against the windscreen. The noise keeps until I go above 85 Mph when it disappears. It was suggested that maybe the wheels needed to be balanced. I took the wheels to be balanced but sadly this didn’t make any difference.

I hope somebody can help or suggest what the problem could be.

https://youtu.be/vj9VS2yZiSE

[Ratrace427]

You could try disconnecting the Speedo cable from the lamda box

Sent from my SM-G920R4 using Tapatalk

[Dangermouse]

Do you feel any vibration in the steering wheel?

[Pascal]

I already disconnected the speedo cable, but alas.
No vibrating at all from the steering wheel.

[DrJeff]

Noises in a speed range are rotational in source or resonance.

A sound against the windscreen could be something resonating in the air at that speed, for example the cowling (screen cowl #105047) if not secured properly could at certain speed vibrate and knock again the windscreen.

[Bitsyncmaster]

Noises in a speed range are rotational in source or resonance.

A sound against the windscreen could be something resonating in the air at that speed, for example the cowling (screen cowl #105047) if not secured properly could at certain speed vibrate and knock again the windscreen.

Try temporarily removing the wipers.

[steve]

That loud sounds like in the cab.

Steve

[Blackie]

Fold up a piece of paper and jam it in between the windscreen and the top black finisher panel then test drive. Mine was doing the same thing and that's what it was, need to re-adjust the panel. Only did it at a certain speed.

[DMC-81]

Fold up a piece of paper and jam it in between the windscreen and the top black finisher panel then test drive. Mine was doing the same thing and that's what it was, need to re-adjust the panel. Only did it at a certain speed.

My money is on this cause. Mine was loose, and I discovered that it was missing the foam weatherstripping (108632). The lack of foam allowed the finisher's metal tabs to click against the SS retainer. Once I installed the foam, it was tight. Here are a couple pics to illustrate:

Underside of finisher panel
52000
Retainer
52001
Foam
52002
Installed
52003

[DMC-81]

My money is on this cause. Mine was loose, and I discovered that it was missing the foam weatherstripping (108632). The lack of foam allowed the finisher's metal tabs to click against the SS retainer. Once I installed the foam, it was tight. Here are a couple pics to illustrate:

Underside of finisher panel
52000
Retainer
52001
Foam
52002
Installed
52003

Sorry, the part number is 106852.

[Pascal]

Thank you guys for your suggestions. I really do hope that this is the problem because it is driving me crazy.
Next week I will go for a test drive with something between the finisher panel and the windscreen as Blackie suggested.
Thanks for the pictures DMC-81.

If this is causing the problem then it's going to be a nice and easy fix.

I will keep you posted.

[Pascal]

Took the car for a test drive yesterday.
I put a piece of paper between the black finisher panel and the windscreen as Blackie suggested.

Blackie and DMC-81 you are my heroes!!!!

The rattling sound completely disappeared.

Today I removed the finisher panel and there was no foam weatherstripping at all, or even a trace of weatherstripping. So I inserted a rubber weatherstripping (€1,00), as shown on the pictures by DMC-81, and the problem is completely fixed.

Many, many thanks for your help!!!

[Dangermouse]

That's great news.

See, who said DeLoreans are expensive to maintain ? :)

[DMC-81]

Excellent news!! Glad that it worked out for you! :thumbup: