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Roof rail antics!
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dstevec
 


Member Since: 07 May 2017
Location: Dundee
Posts: 58

United Kingdom 2009 Discovery 4 3.0 TDV6 GS Auto Galway GreenDiscovery 4
Roof rail antics!



So I have a d4 GS. It didn't come with roof rails, so bought a set from a breakers. Attempted to remove the plastic grommets, but they were stuck fast. Even with wd40 there was no movement. YouTube vid lied!!

Anyway, this is drilled out. Long story short is that plastic remained after i thought was removed. This caused the bolt to snap inside, then drilling this out has also failed. So, my question is: How easy is it to remove the nut from the roof? Do i just drill out the welds around it?
 4x4 Phase:
D4 - GS - Tints - More mods to follow.
Honda CRV 2.2 ctdi - owned 5 Years - Sold
Nissan X-trail SVE 2.2d - Written off after 1 year
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Post #19521589th Jun 2018 12:53 pm
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deanslandy
 


Member Since: 17 Jan 2015
Location: nuneaton
Posts: 651

England 2007 Discovery 3 TDV6 HSE Auto Tonga GreenDiscovery 3

Hi,
I wouldn't remove the nut from the roof I would try and either clean out the existing thread and re tap or helicoil insert
There are many vids on tinterwab on how to helicoil
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Post #19521599th Jun 2018 1:23 pm
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Narpy
 


Member Since: 18 Jul 2011
Location: Stockport
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2005 Discovery 3 TDV6 S Manual Cairns BlueDiscovery 3

Why were you using WD40, you dig the plastic plugs out with a small screwdriver and the jobs done?
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Post #19521649th Jun 2018 1:57 pm
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dstevec
 


Member Since: 07 May 2017
Location: Dundee
Posts: 58

United Kingdom 2009 Discovery 4 3.0 TDV6 GS Auto Galway GreenDiscovery 4

The plugs were jammed tight. Tried to lube them with wd, but that didn't work. Finally worked out that they unscrew very easily, so youtube video was steering me in the wrong direction. Rolling Eyes

I'll have a look at helicoil. Cheers Thumbs Up
 4x4 Phase:
D4 - GS - Tints - More mods to follow.
Honda CRV 2.2 ctdi - owned 5 Years - Sold
Nissan X-trail SVE 2.2d - Written off after 1 year
Toy - Yamaha xjr 1200 
 
Post #19521699th Jun 2018 2:29 pm
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Grease Monkey
 


Member Since: 24 May 2009
Location: Essex
Posts: 134

England 2010 Discovery 4 3.0 TDV6 SE Auto Zermatt SilverDiscovery 4
Re: Roof rail antics!

dstevec wrote:


So I have a d4 GS. It didn't come with roof rails, so bought a set from a breakers. Attempted to remove the plastic grommets, but they were stuck fast. Even with wd40 there was no movement. YouTube vid lied!!

Anyway, this is drilled out. Long story short is that plastic remained after i thought was removed. This caused the bolt to snap inside, then drilling this out has also failed. So, my question is: How easy is it to remove the nut from the roof? Do i just drill out the welds around it?


The nut isn't welded, you need to dig out the sealant around the hex nut remove it and replace with a new one then reseal.

Part No. AYR500061



Hope that helps,

GM
 2009 D4 Zermatt Silver SE (Pre-Production) - Current
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Post #19522529th Jun 2018 7:45 pm
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dstevec
 


Member Since: 07 May 2017
Location: Dundee
Posts: 58

United Kingdom 2009 Discovery 4 3.0 TDV6 GS Auto Galway GreenDiscovery 4

This is the best news I've had in ages! Thanks for this! Bow down
 4x4 Phase:
D4 - GS - Tints - More mods to follow.
Honda CRV 2.2 ctdi - owned 5 Years - Sold
Nissan X-trail SVE 2.2d - Written off after 1 year
Toy - Yamaha xjr 1200 
 
Post #19523259th Jun 2018 11:18 pm
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Grease Monkey
 


Member Since: 24 May 2009
Location: Essex
Posts: 134

England 2010 Discovery 4 3.0 TDV6 SE Auto Zermatt SilverDiscovery 4

No probs Thumbs Up

A few of us have had similar issues Evil or Very Mad

Good luck with fix

GM
 2009 D4 Zermatt Silver SE (Pre-Production) - Current
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2009 FL2 Zermatt Silver XS - Gone
2005 D3 Zambezi Silver S (ex Bigdave) - Gone
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Post #195258910th Jun 2018 7:37 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Anyone know the inner thread width please?

Thinking of just bolting straight through and saving money
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #227835911th Feb 2022 11:23 am
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15264

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

It's an M6 bolt [I believe with a thread pitch of 1.0]

For bolting down roof rails then its a max shank length of 22mm.

If bolting down direct [eg roof rack bracket] then it's a max shank length of 15mm .

edited to add: if the nut hasn't previously had a bolt threaded in it, then you'll need to clean it out, either with a tap& die set or a cut bolt.
 

Last edited by ronp on 11th Feb 2022 12:07 pm. Edited 1 time in total 
Post #227836411th Feb 2022 12:03 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

The width I’m after sorry. Not the top smaller bolt but the inmer thread. It’s either 8 or 10
 Disco 3 SE Manual 2005 V6 2.7
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Post #227836511th Feb 2022 12:05 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15264

Scotland 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Don't know if were talking about the same thing here Confused

But my roof bolts are M6 [which by definition have a 6mm diameter thread and which screws into a 6mm inner thread].
  
Post #227836811th Feb 2022 12:22 pm
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cmb2020
 


Member Since: 08 Sep 2020
Location: Buckley, North Wales
Posts: 1150

United Kingdom 2005 Discovery 3 TDV6 SE Manual Aintree GreenDiscovery 3

Just took one out it’s m10

I’m in about the adapter plug thing that sits in the roof for the m6 to bolt rail on to
 Disco 3 SE Manual 2005 V6 2.7
Buckley, North Wales 
 
Post #227837011th Feb 2022 12:39 pm
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Robbie
 


Member Since: 05 Feb 2006
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United Kingdom 2013 Discovery 4 3.0 SDV6 HSE Auto Baltic BlueDiscovery 4

cmb2020 wrote:
Anyone know the inner thread width please?

Thinking of just bolting straight through and saving money


Bolting through is a good idea when carrying a proper load. The little M6 screws don't have much shear strength - hence the low published load rating for the roof system.

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Post #227837611th Feb 2022 12:55 pm
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Yankee_Rover
 


Member Since: 02 Jun 2021
Location: Seattle
Posts: 183

United States 2008 LR3 4.4 V8 HSE Lux Auto Zermatt SilverLR3

Robbie,

When you say bolt directly through, do you mean:

1) Remove the existing stud (below) and use it’s nut inside the roof to retain a larger bolt, which connects the roof rail



Or

2) Drill new holes along the roof line and add new through bolts? I presume this would require pulling headliner at the edges and using some washers to spread the load.

I assume it’s #1, but I know I’ve seen people do #2. Option #1 seems pretty straight forward, and actually something I may do when I mount my roof rack.
 2008 LR3 HSE, 4.4L V8  
Post #227837911th Feb 2022 1:11 pm
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robpenrose
 


Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2138

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

Robbie wrote:
cmb2020 wrote:
Anyone know the inner thread width please?

Thinking of just bolting straight through and saving money


Bolting through is a good idea when carrying a proper load. The little M6 screws don't have much shear strength - hence the low published load rating for the roof system.

Thumbs Up


Haven't seen you post much these days Robbie. Hope all is well Thumbs Up
 

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Post #227840511th Feb 2022 3:32 pm
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