Hood "tremor" at speed

[Alfa 2407]

I don't understand what you are trying to explain. If the bracing isnt attached what is it supporting then ?

It is a brace designed to keep the hood from twisting side to side and keep the sides of the hood straight

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[Area51BS]

I don't understand what you are trying to explain. If the bracing isnt attached what is it supporting then ?

Look under the hood. And the combined thickness of skin and bracing coupled with material types doesn’t make a stiff panel. Filling the gap with body foam forms a stronger and stiffer panel. Similar to a foam core with carbon or fiberglass built boat.

 

[MoFoCo]

Driving across the Utah salt flats on I-80 last week, it looked like the hood might fly off. It was waaay more than a little tremor. There was a 50+ MPH crosswind, and any time I passed a semi truck the entire hood was bouncing up and down at least 1/4". Speed was 75-80 MPH.

Just to really test the thing, you know, for science, I got up to 100 MPH for a few seconds. Fortunately it stayed attached.

For the record, I do not have a hood deflector.

 

[Bucko]

I think there are a lot of factors at play here. The video from OP was taken from a very low perspective, which makes hood movement much more apparent. If your seating height puts your head up high toward the roof, hood movement may not be so noticeable. In addition, "tremor" can be a very subjective term. One person's tremor is another's earthquake.

So the fix for this is for those who see their hood flexing, raise your seat up.

 

[KidWiff]

it only happens at highway speeds and, when it does, i just close my eyes and it goes away. Problem solved!

 

[BigBadWolf]

Got up to 120 mph passing a gaggle of semi trucks on I40. I have never noticed any vibration.

 

[Cobrablues]

I recently put a plastic hose in the rubber hollow seal in the one nearest the windshield. It was a tight fit but I used baby powder and it fit fairly easy. It made hardly minimal improvement but it helped. Then I opened up the rubber hood bumpers all the way. Actually that made it much worse. So I loosened the bumpers about 2 complete turns and that resulted in a great improvement. Bottom line the sheet metal is very thin and light and it will flex.

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