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Does you 912 or 911 bonnet pop open!

Posted: Mon Mar 14, 2005 9:09 am
by Bootsy
A solution from 912uk - Mark Collins


Yep I had enough it had to be solved and solved it is.

right how I hear you ask. Well very easy once I really sat down and looked hard

One the pin as we will call it that has the spring around it has to enter the latch square. The problem was that it was not. So adjust as much as you like it was not going to adjust enough. So off with the pin assemberly on the bonnet and large round file and file away. Now the hole is yea big and needs to yea hey big!! . much bigger. this alows you so much more ajustment.

1st step to the staying down bonnet. So with this bit done (must piont out don' t worry about making the hole too big as the washers if you look are BIG)

Now attach the pin assemberly back in place. Get down on knee and look to see if the pin is entering the latch square.

Check from the front easy bit.

Then from the side Hard bit as you have to look along the inside of the bonnet just as it closes you will see the pin enter the latch. If you need to add a little tip ex to the center of the side of the latch so you can see it. This will help
The chances are that it is not going in square. So this is the bit that makes all the difference. You have to get tough. Large adjustable spaner. You will need to open it enough to cover the pin and the spring and you have to bend the pin so as to make it square to the latch. Yes you think you are going to do some damage but I have done it and it has worked fine no damage . To be sure just do a little at a time. Once you have moved the pin to make sure it is square back on your knees to see if it is. Chances are you will have to get out the 10mm spanner again and adjust the pin assemberly back abit. As when you bent the pin in to shape it has moved the alinement.

now for the test don' t just shut the bonnet because if it is wrong then it will lock and you can' t get it open. Put your hand under the bonnet so as to be able to hold the safety latch back and close and open the bonnet on the spring with out shutting it totaly if this works fine then you will be able to close the bonnet and open it again. If you push down and you can' t open it again DON' T fully shut it pull out and up and it should open again. If not keep trying it should open again. Then get the 10mm spanner out again and adjust it again until the above happens ( the spring open /shut easy)

Mine is now OK I have just driven from Abbottsbury to Dorchester along loverly views but a very bumpy road and er nothing one staying shut bonnet. and it opens at the other end to put the shopping in. COOL or what!!!!!!! oh and the red 924 that parked next to my 912 in Tesco' s to night .........sorry i like the 12' s too much. Yes I know it' s red but it' s a 924.


M

Posted: Mon Mar 14, 2005 9:14 am
by 912uk
I will try and take some photo's of this and I am happy to show any one when we all meet up say at Sandown or the pre 73 event in may. It is very easy and when you see what I mean it makes so much sence. The whole piont is the pin HAS to go in the latch dead square 360* degrees otherwise it pops open. Your car may have had the front panel changed or a new bonnet or like mine it must have at the front edge of the bonnet bumped at some time.. all this will put it slightly out of line.

Posted: Wed Aug 17, 2005 3:38 pm
by gav p
Mine stopped popping once I had thoroughly degreased the mechanism. It still works just as well without lube but now never pops on its own.... worth a try :wink:

Posted: Thu Sep 15, 2005 2:24 pm
by 912uk
But if the alinement is still not 100% it could pop up. I will try later with more time to do a phew pictures and drawings. It's not rocket science it's just getting the pin and latch back to where it was when 30 odd years of car park shunts and dodgey car bodge it and fix people have done to it over the years..

Mark

Posted: Wed May 16, 2007 6:50 pm
by Guest
I had a problem with the bonnet not staying shut, I messed around with the mechanism and couldn't get it to reliably stay shut, but eventually found out the problem wasn't with the latch, but with the pull handle inside the car. It had started to unscrew from the cable and slackened off the adjustment. Wish I realised this before spending an inordanant amount of time messing wqith the latch.

Posted: Sat Dec 08, 2007 10:43 am
by Helen
had this problem at the end of this summer.
gave the latch & pin a good clean and re-greased and all was well untill the week-end before last when i took the car down to Bruntingthorpe.

its now a nightmare and i just can't seem to get the stupid thing to stay shut.

in desperation, i'm thinking of fitting bonnet clips like an R/S :evil:

Posted: Sat Dec 08, 2007 12:18 pm
by TimB
Had this problem last year...turned out to be the sheath that the relaease cable runs in was caught on the edge of the lower part of the catch mechanism in the front panel therefore never letting the catch engage properly with the slightest bump popping open the bonnet.
Once it had been pointed out to me fixed in seconds!!!
Worth a look Helen, if this is the problem on yours you will have a no cost fix and a great deal of satisfaction.......if like me this will then change to embarrassment that you didn't spot it but at least you will know you are not the only one!

Posted: Sat Dec 08, 2007 12:27 pm
by Helen
TimB wrote:Had this problem last year...turned out to be the sheath that the relaease cable runs in was caught on the edge of the lower part of the catch mechanism in the front panel therefore never letting the catch engage properly with the slightest bump popping open the bonnet.
Once it had been pointed out to me fixed in seconds!!!
Worth a look Helen, if this is the problem on yours you will have a no cost fix and a great deal of satisfaction.......if like me this will then change to embarrassment that you didn't spot it but at least you will know you are not the only one!
well worth a look. thanks. when it stops raining i'll go and take a look.

why does Porsche make these things so fiddly to get at :evil:

Re: Does you 912 or 911 bonnet pop open!

Posted: Tue Apr 23, 2013 6:41 pm
by dogbower
Just sorted mine, it required the pin extending. Just undo the the nut and it screws out, then do the nut back up. :)

Re: Does you 912 or 911 bonnet pop open!

Posted: Tue Jun 16, 2020 4:02 pm
by BILLY BEAN
Rear tow hook. Anyone know how this attaches to the rear? Does it use any existing fittings on an early 911 or are new holes/ bolts required? Thanks. Image

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Re: Does you 912 or 911 bonnet pop open!

Posted: Tue Jun 16, 2020 9:54 pm
by Lightweight_911
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I think you posted this in the wrong place Kirk !

The rear tow hook uses 2 of the existing bolts which attach the osr bumper to body ...

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Re: Does you 912 or 911 bonnet pop open!

Posted: Wed Jun 17, 2020 12:22 pm
by Lightweight_911
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Further to my earlier reply, when fitting the rear tow hook (option M428) the std bumper attachment bolts (M8 x 25) were replaced by longer (M8 x 35) versions.


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Re: Does you 912 or 911 bonnet pop open!

Posted: Tue Aug 18, 2020 9:10 pm
by Gduplock
Had this problem for a couple of years 2014-16.

Followed advice to clean up, rotate plunger, adjust length and add some metal to end of plunger.

Nothing successful.

Asked independent specialist to look at it when they were doing some other work. They replaced cable first, did not solve, then they replaced lower part (attached to body) no success. Bought and fitted new upper part (with plunger). Never any problem again!

Only problem, it cost me a lot a angst for couple of years and worst of all at least £250!!

Re: Does you 912 or 911 bonnet pop open!

Posted: Tue Aug 18, 2020 10:27 pm
by redrobin911
Gduplock wrote:Had this problem for a couple of years 2014-16.

Followed advice to clean up, rotate plunger, adjust length and add some metal to end of plunger.

Nothing successful.

Asked independent specialist to look at it when they were doing some other work. They replaced cable first, did not solve, then they replaced lower part (attached to body) no success. Bought and fitted new upper part (with plunger). Never any problem again!

Only problem, it cost me a lot a angst for couple of years and worst of all at least £250!!
Same for me the only solution was a new top and bottom latch.. problem solved. Fiddling not required, just parts.

Re: Does you 912 or 911 bonnet pop open!

Posted: Thu Sep 29, 2022 8:22 pm
by GonzoBard
My bonnet did pop open. Found it was the rubber seal around the ‘rain gutter’ that was not in correctly and was preventing the bonnet from closing properly. Easily sorted.