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Lunar Landy



Member Since: 02 Jun 2023
Location: Northamptonshire
Posts: 31

United Kingdom 2003 Defender 90 2.5 TD HT Bonatti Grey
Rotating rivnut

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Hi All,
I’ve attempted to remove the front LH mud flap on my defender 90, unfortunately both bolts are rotating with the rivnut, on reading some of the threads there appears to be a method to remove the bolt and Knocking thru the rivnut.

Ive placed my drill simulating the drilling process but the drill fowls on the mudflap thus the drilling would be at an angle, not align to the bolt axis
Can you help with this and give me all the options that are available?
Many thanks
Post #1034285 9th May 2024 12:22pm
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2090

United Kingdom 1984 Defender 90 200 Tdi HT Pennine Grey
Use your angle grinder to cut the head off and knock it through ?
Mo The Land Rover 90 - Many are called, few are chosen.
Post #1034286 9th May 2024 12:34pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19677

United Kingdom 
You could get a grinder in there carefully, just ensure not to cut anything but the bolt.
(The wheel might be in the way which is a pain…)…
Then you can remove the mud flap bracket and then drill out the remains on the bolt and knock out the remains of the rivnut in a more controlled way which is safer and less likely to damage the surrounding steel.

Cobalt HSS dill bits are good, they can be a bit brittle but are easier in hard steels and materials.
It’s a harder more time consuming way of doing but it’s safer, and more reliable.
If it still tries to spin drilling, stick a chisel into the side of it to keep it still, so long as PPE is used and keeps fingers away you’ll be okay.
At least you can do it whenever you want at convenience and still drive it. Thumbs Up

Rivnuts are just little so and so’s for spinning, I think they are best avoided as much as practically possible. Diesel$ Live$ Matter. ⛽️🛢️👨‍🔧🧰⚙️ RED, WHITE & BOOST! 🇬🇧
Post #1034291 9th May 2024 12:45pm
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rustandoil



Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 678

England 2005 Defender 110 Td5 XS DCPU Bonatti Grey
Looks like an angle grinder job to me
Post #1034292 9th May 2024 12:49pm
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Cragster69



Member Since: 15 Jun 2021
Location: Scotland
Posts: 174

Scotland 2007 Defender 110 Puma 2.4 CSW Cairns Blue
I did mine with a pair of molegrips to hold the spinning rivnut, via the opening in the underside of the outrigger.
It's a bit more of a faff but I didn't have an angle grinder Craig.

“Don't believe everything you read on the internet.” ― Abraham Lincoln

www.scotgrc.co.uk
Post #1034303 9th May 2024 1:59pm
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Lunar Landy



Member Since: 02 Jun 2023
Location: Northamptonshire
Posts: 31

United Kingdom 2003 Defender 90 2.5 TD HT Bonatti Grey
Hi All,
Thanks for the valuable advice, I did use an angle grinder, unfortunately I caught a bit of the surrounding chassis, just a bit scuffed but not much damage.

What surprised me was they were bolts and not rivnuts, so the mudflap was easy to remove. It could have been problematic as the bolts protruded at about 8 mm from the nuts.
I used shorter stainless steel bolts, it was a right faff in holding the nuts on the inside Big Cry
But being a skinny short runt the operation was successful with no need of the sear box!

I looked at the rear mudflaps luckily there are in good condition, but the bracket bolts into the chassis must screw into rivnuts as I can’t see any openings for access??

Thanks
Post #1034460 11th May 2024 12:39pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16947

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Yes, the rears use threaded inserts but if I recall correctly they are hex-bodied ones, less prone to spinning. Instead the machine screw shears off leaving the end in the insert! Rolling Eyes
Post #1034478 11th May 2024 5:50pm
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Lunar Landy



Member Since: 02 Jun 2023
Location: Northamptonshire
Posts: 31

United Kingdom 2003 Defender 90 2.5 TD HT Bonatti Grey
Thanks for your response, at least you have half a chance.
, I recently purchased a rear step and it was supplied with hexagonal rivnuts , smaller than the hexagonal openinings in the crossmember, being far to loose. So I drilled two more holes to accommodate the smaller one’s supplied, I had to file the edges of the the rivnuts to have a close fit in the holes. I’m about to use the diy tool to insert them.🙏
Post #1034536 12th May 2024 1:52pm
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2090

United Kingdom 1984 Defender 90 200 Tdi HT Pennine Grey
My step has recently pulled the inserts out of the cross member after 12 years.
At least I dont have to get them out 😃
I think I'll replace with boss plates fed in on a filler rod and then welded through.
Mo The Land Rover 90 - Many are called, few are chosen.
Post #1034559 12th May 2024 4:57pm
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