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jl-c
Spa-Francorchamps


Joined: 22 Jul 2013
Posts: 276
Location: Shropshire


PostPosted: Sat Dec 28, 2019 9:25 pm    Post subject: Reply with quote

If you try it this way use Loctite 3888 as it is the conductive one.
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Porsche Carrera 2S 2005 black fully Hartech'd!, BMW Z4 coupé 2007 blue, Mazda Eunos 1996 yellow, VW Passat 2014 black.


We all do silly things/make mistakes, it's how we deal with them that sets us apart from animals and Americans.
 
  
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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Sat Dec 28, 2019 10:12 pm    Post subject: Reply with quote

P9XX wrote:
Rob_p. I think you've already thought of this idea.
As a temporary or even permanent fix for the earth strap stud, you seem to have about 4 to 6 threads showing. If so, I would try a stainless rod coupler nut with Loctite onto the cleaned threads. Check electrical continuity from the coupler to the chassis. Then a short, M8 X 12 say, bolt to re-attach the earth strap.


Thanks. Yes I found something similar on eBay for £2 and wondered if that would work. I assume this will be M8?

I have also ordered one of DeMort's nut rivet guns. It's always good to have options.
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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Sat Dec 28, 2019 10:14 pm    Post subject: Reply with quote

deMort wrote:
I see what you mean by bumper bracket now .. you can drill a hole and use a self cutting bolt / screw to reattach that .. it's no problem if left off for now .

As it stands and after thinking about it your car won't start .. i remember leaving off an earth lead on an engine drop in the past .. it wont start .

Fixes .. a welded stud is best .. body shops have this sort of equipment but that doesn't really help you atm ..

My suggestion if you want to try it ..

You use the kit in the link below ..

You basically drill a hole , insert the collapsable threaded rivet nut and use the tool to compress it .. you then have something to put a bolt into for the earth lead .

Access is the only problem with the tool .. it will stick out at a right angle from the chassis .. if you have the clearance then this is the best diy i can think of .


https://www.ebay.co.uk/itm/Blind-THREADED-NUT-RIVET-INSERT-TOOL-GUN-RIV-NUT-RIVET-M3-M4-M5-M8-RIVETER-Set/132927926036?hash=item1ef31f2f14:g:g7YAAOSwUMBcSJGb

Btw .. im happy to chat on the phone should you wish to , just say and ill PM you my number .


Thanks DeMort. Rivet gun ordered. I may well take you up on your offer of a chat on the phone. Thanks!
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997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex 991.1 C2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
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Plus some other stuff that wasn't very interesting....
 
  
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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Sun Dec 29, 2019 1:19 pm    Post subject: Reply with quote

Quick update.
I have ordered some of the nut rivets and a nut extender.
Looking again today there is about a nut and a half of thread on the sheared stud and I can get an M8 nut on it. Turns out I can therefore get the earth strap and about half a nut of thread on it. Not ideal but will get me to a garage if i need to.
I think the nut extender idea should work quite well.
There is also another whole with a blanking plug in it next to this which presumably I could use for a new earth connection of I needed to? (Using the rivet nut).

I have also drilled out the bumper bar connection snapped stud. This looks a lot like Porsche used their own version of a nut rivet so I am hoping a new one will just slot right in. The original was M6 but if I need to I could do up to M8.

Thanks for the help so far, once the parts arrive I should be able to get it all back together.
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997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex 991.1 C2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 
  
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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Sun Dec 29, 2019 1:35 pm    Post subject: Reply with quote

Quite an interesting video for anyone interested in nut rivets...

https://youtu.be/qhzVDvnN_yM
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997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex 991.1 C2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7829
Location: Brighton


PostPosted: Sun Dec 29, 2019 5:05 pm    Post subject: Reply with quote

If that blanking hole is M8 or 8mm then you should be able to use that.

The video .. dam clever .. i don't often use this tool as its more of an emergency repair but i never even thought of using a bolt / nut Surprised

learnt something new today Thumb
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darkhorse
Monza


Joined: 24 Feb 2019
Posts: 224
Location: under the car


PostPosted: Sun Dec 29, 2019 5:54 pm    Post subject: Reply with quote

One word of caution. I used the DIY nutcert tool. It took some faffing to make it work.. but if space is tight it is a good option. It needs a grip spike washer onto the nutcert top, then the rest of the bits.
If you use stainless steel nutcerts as I did, M8 ones are VERY hard to compress using this method. It took me a lot of swearing to get them compressed and locked in, and I wished I had ordered the nutcert tool.
 
  
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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Wed Jan 01, 2020 7:46 pm    Post subject: Reply with quote

Quick update.

I fixed the earth terminal issue with the "nut extender". It went on pretty firmly in the end and i think looks like a pretty good permanent solution.

Everything is back together and the car is running well. The original misfire has been resolved so confirmed this was a faulty coil pack on cylinder two.

I still need to fix the bumper bracket which is the hole to the RHS of the earth terminal. I will do that when the rivnut parts arrive - probably this weekend.

thanks for everyones help with this - especially Demort who has been legendary as ever!

I also managed a quick oil change today while I had the spanners out.
_________________
997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex 991.1 C2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 



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rob_p
Suzuka


Joined: 20 Oct 2013
Posts: 1012
Location: Leicester


PostPosted: Sun Feb 09, 2020 3:14 pm    Post subject: Reply with quote

Quick final update on this thread.
Having fixed the earth strap I then received the "riv nut" kit that Demort recommended.
The tool included (just like a rivet gun) broke the first time i tried to use it - the tool is nowhere near strong enough for the job required. So i made a DIY tool like i had seen on youtube (photo below).
Advice - just buy the riv buts on ebay and make your own tool.
That was pretty much it. I used an M8 instead of an M6 to hold the bumper bar on - but no big deal. All back on the road.
_________________
997.1 C2 (full Hartech rebuild, Ohlins coilovers, ducktail, plus some other bits)
Jeep Grand Cherokee WK2
Ex 991.1 C2
Ex Audi A8 V8 4.2tdi (best all round car I will ever own?)
Ex Porsche Boxster 986
Ex Mazda MX5 mk1
Plus some other stuff that wasn't very interesting....
 



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chowgar
Spa-Francorchamps


Joined: 09 Aug 2014
Posts: 250
Location: London


PostPosted: Sun Feb 09, 2020 4:43 pm    Post subject: Reply with quote

I admire your tenacity in pushing forward to get this job completed.
 
  
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