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Hood flutter/shake at freeway speeds? 521


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#1 d.p

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Posted 01 August 2017 - 09:18 AM

Anyone bought them recently?  If so from where?  Mine are tired and in need of replacement.    Seen the thailand ones on the bay but wondering if there is anything else out there.  



#2 Draker

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Posted 01 August 2017 - 09:53 AM

Just get the thai ones. They aren't exposed to direct sunlight and are cheap. Buy two sets.


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#3 Crashtd420

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Posted 01 August 2017 - 09:54 AM

You mean those 4 little rubbers that attach to the fenders under the hood...?
I just bought those eBay ones myself... seem just fine for what they do.

#4 d.p

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Posted 01 August 2017 - 10:04 AM

Word



#5 d.p

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Posted 31 August 2017 - 09:17 AM

I have a 521 and the hood latches tight, the hood bumpers are little worn/flattened but anyways at speed on the freeway (60+) the hood flutters and shakes.  When the hood is closed I can still push it down like an 1/2 - 1".  I guess that is because the spring has room to travel.  Is that normal?  And could that be why the hood shakes?



#6 Draker

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Posted 31 August 2017 - 09:27 AM

The hood is boned to the frame with panel bonding agent. hood flutter is probably worn hood bumpers. I replaced mine on my 510 with OEM units and it still does it. 

 

You can get height adjustable bumpers and install those on the core support and that should fix it.


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#7 Crashtd420

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Posted 31 August 2017 - 09:28 AM

I think i know what you mean....
The skin vs frame. That makes sense
My hood was like that.... I was told to use seam sealer....
Mine was all dryed and breaking apart....
I think I have a pic some where.....

#8 Crashtd420

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Posted 31 August 2017 - 09:32 AM

Did you post this somewhere else.... I swear you mentioned something about the skin and the frame work being unbonded..

#9 Crashtd420

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Posted 31 August 2017 - 10:07 AM

I guess the real question is where are you seeing this flutter....
Is it the center of the hood fluttering like a sail...
Or side to side because the bumpers are worn.....
I always thought the front lock was pretty fixed where it was, with no adjustment..

#10 banzai510(hainz)

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Posted 31 August 2017 - 10:34 AM

my hood side bumpers were worn so I built them back up with soem black permatex RTV.

 

I had a 510 with a rotton hood and the braces where the panel bonding agaent broke or wore out whcy caused a flutter and the latch area was rusted out on hood. (Lucky it didnt fly open on me)


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#11 d.p

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Posted 31 August 2017 - 11:41 AM

It bounces on the edges. Moreso on the passenger side. Hood just has a lot of up and down movement when latched shut which I don't think it should.

And my bumpers are tires as shit. So I doubt they are holding the hood that well if that is what they do.

video: https://flic.kr/p/X21rU3



#12 banzai510(hainz)

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Posted 31 August 2017 - 12:29 PM

winging this here but look lik the hood can come down more.

Open the hoof and on the bulb shaped plunger with the spring youll see a screw driver slot

you can tun this in and it will pull the hood farther down or up to get it prefect. just mack sure the female part on the core support fully encloses the bulb to its seculy latched.

 

as for the side wiggling Like I sad I just got some Black RTV and build up the old hood bumber pads. leave hood open over night and bam close hood . it will fit better over time if you put too much on


Throw on some Weber sidedrafts, Rising Sun hood.... call it good

#13 d.p

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Posted 31 August 2017 - 12:52 PM

weird cause its pretty well lined up with the fenders...for the most part.   If it came down more it would sit lower than the fender lines.  Will play with the plunger a little bit and see what happens.  Do the bumpers help keep it in place/stable?  I am going to replace those fuckers anyway.  

 

 

36550122650_eb94e9e15c_z.jpg



#14 5t341tH

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Posted 31 August 2017 - 12:57 PM

Those bumpers definitely help. I had old, rotted ones and replaced them with new. Now the hood is straight and wiggle free. Now I just have to deal with the hood being separate from the spine underneath somehow...
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#15 Crashtd420

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Posted 31 August 2017 - 01:09 PM

Those bumpers definitely help. I had old, rotted ones and replaced them with new. Now the hood is straight and wiggle free. Now I just have to deal with the hood being separate from the spine underneath somehow...

Use seam sealer. That's what I was told to use... if you look you ll see the dried up globs between the hood skin and the spine structure... just grind it out and redo or add more next to it.... depends on how perfect you want it ...

And DP the front line of the hood seems crooked.... high on the passenger and a little low on driverside.....
Maybe it is just those 4 rubber things...
Try using some tape or something to build up the driver side rubber and see if it makes it look straighter.
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#16 d.p

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Posted 31 August 2017 - 01:15 PM

Same problem with my seams as well.  Yeah its not equal on both ends so I am going to order new bumpers and go from there.  



#17 d.p

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Posted 31 August 2017 - 03:48 PM

Well I tried to switch the driver side bumper with the passenger but the driver side disintegrated when I pulled it out.  So I put the pass on the driver side and even without the passenger side one the hood was tighter than it ever was before.  So I went and ordered 4 bumpers from the dealer ( 65158A4500). 

 

Also the plunger is seized so I couldn't adjust it but don't need to.  



#18 datzenmike

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Posted 31 August 2017 - 04:40 PM

Get suitable size hose, about a inch long and screw it onto the ledge. Hood will close and crush into shape.

 

Go to wrecking yard and find a set of these and mount on the top of rad support...

 

CE10531-lrg.jpg


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#19 datzenmike

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Posted 31 August 2017 - 04:42 PM

Why do we have two posts on this???  http://community.rat...3-hood-bumpers/


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#20 d.p

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Posted 31 August 2017 - 05:02 PM

Like rubber vaccum hose?  Screw that down?

 

And WTF are those?  What would I even be looking for in a wrecking yard to find them? 

 

Ordered 4 hood bumpers from the Nissan dealer today.  $12.  Hopefully they work otherwise $50 from Thailand.