Bonnet Question

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John Vardanian
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Bonnet Question

Post by John Vardanian » Sun Nov 10, 2019 2:35 am

There is a pair of spiral helper springs at the hinges. Are these supposed to hold up the bonnet? I don't think mine are working that well. Thanks.

john
PF Coupe

chris
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Re: Bonnet Question

Post by chris » Sun Nov 10, 2019 4:40 am

Hi John,

that is my understanding. Mine were missing on my S3 Gte
and I bought a used pair. They are very hard to move by hand, so have a lot of spring tension. Have you tried them
of the car?

Christopher

enio45
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Re: Bonnet Question

Post by enio45 » Sun Nov 10, 2019 11:51 pm

john, do you have a hood prop rod for your car? If there is not one, then i believe the springs are to do the trick keeping the hood up.

which car you talking about?
Ed Montini
330 GT 2+2 Series II - 8289
58 Ellena - 0855GT - orig drivetrain

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John Vardanian
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Re: Bonnet Question

Post by John Vardanian » Mon Nov 11, 2019 1:31 am

Ed, Chris, yes I have these on the hinges on my PF coupe and have a hood prop too. I think all cars have both and the prop is added insurance. I am told that the springs should hold up the hood wide open.

john
PF Coupe

chris
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Re: Bonnet Question

Post by chris » Mon Nov 11, 2019 2:43 am

Agree. Mine has both. 250 Gte S3.

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Terry Gardiner
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Re: Bonnet Question

Post by Terry Gardiner » Mon Nov 11, 2019 3:59 am

There's no prop on #4681 - series 3, just the springs. Perhaps I should research and get a prop.
Terry Gardiner
250GTE - #4681
365BB - #18131

chris
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Re: Bonnet Question

Post by chris » Mon Nov 11, 2019 5:11 am

Mine is 4701 and has both.
Christopher

enio45
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Re: Bonnet Question

Post by enio45 » Mon Nov 11, 2019 1:41 pm

John Vardanian wrote:
Mon Nov 11, 2019 1:31 am
Ed, Chris, yes I have these on the hinges on my PF coupe and have a hood prop too. I think all cars have both and the prop is added insurance. I am told that the springs should hold up the hood wide open.

john
That does make sense to me........
Ed Montini
330 GT 2+2 Series II - 8289
58 Ellena - 0855GT - orig drivetrain

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tyang
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Re: Bonnet Question

Post by tyang » Tue Nov 12, 2019 9:05 am

I've learned not to be definitive with Ferrari, but I can safely say that GTEs have two coil springs wound like a snail on both lower corners of the hood that should have enough tension to hold the hood up. The prop rod is to hold the hood up as a supplement.

SI 330s have a similar set up, but SII 330s went to a torsion type spring that are long rods that cross each other along the leading edge of the hood. These springs are similar to the ones found on GTCs, but are different in length.

Tom
'63 330 America #5053

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John Vardanian
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Re: Bonnet Question

Post by John Vardanian » Wed Nov 13, 2019 2:00 am

So, if you have both the "snail" springs and the prop, and your hood does not stay up w/o the prop... is there a fix? Thanks.

john
PF Coupe

chris
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Re: Bonnet Question

Post by chris » Wed Nov 13, 2019 2:38 am

Hi John,

I would guess that either springs have lost their tension
or someone dismounted them and did not put enough preload on them when mounting them on their individual frames?! Can you put more preload on them if you remove the screw or are they already “tightly” rolled up?

Christopher

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tyang
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Re: Bonnet Question

Post by tyang » Wed Nov 13, 2019 9:50 am

John Vardanian wrote:
Wed Nov 13, 2019 2:00 am
So, if you have both the "snail" springs and the prop, and your hood does not stay up w/o the prop... is there a fix? Thanks.

john
I was just talking to Ed this weekend about questions that no one answers, and this might be one of them! I've never tried disassembling one of these. They are probably pre-tensioned and locked into place. It it was made once, then it can be made again, but it all depends on how much effort it takes.

Good luck.

Tom
'63 330 America #5053

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John Vardanian
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Re: Bonnet Question

Post by John Vardanian » Thu Nov 14, 2019 1:53 am

Thanks Tom, if I come up with a solution I'll be sure to share.

john
PF Coupe

enio45
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Re: Bonnet Question

Post by enio45 » Sat Nov 16, 2019 12:06 pm

John, thinking about your question, is it possible that the wound springs main function is to get the hood to "pop open" when the latch is released and NOT be the sole support keeping it open?
Ed Montini
330 GT 2+2 Series II - 8289
58 Ellena - 0855GT - orig drivetrain

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John Vardanian
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Re: Bonnet Question

Post by John Vardanian » Sun Nov 17, 2019 2:42 am

Ed, I've seen another car like mine where the fellow raised his hood and the hood went up with ease. Mine is like dead weight and feels like there is zero assist.
PF Coupe

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