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Snapped bolt - Advice and Guidance needed
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onetwentie
 


Member Since: 25 May 2020
Location: West Yorkshire
Posts: 93

United Kingdom 2009 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4
Snapped bolt - Advice and Guidance needed

Afternoon all..

So I ordered a replacement auxillary/fan belt with the tensioner from a reputable seller. The tensioner was BRITPART so I assume decent enough quality.

The bolt was a 14mm head and I measured the thickness of it - was 9.5mm.

Went to torque it up and according to the haynes manual it should be 35 foot pounds. Waiting for the torque wrench to click.. no click.. kept tightening it.. SNAP bolt snapped. Big Cry

Now I have a bolt snapped into the bracket that holds the tensioner.!! I believe it is a bracket anyway, I think the alternator is mounted to the same bracket.

Anyone ever had this happen? anyone able to recommend the best tool/method to remove the snapped bolt?

I have some reverse screw removers, but not sure they will work. Is it too much of a pain to remove the bracket and do this on the workbench or am I likely to face issues with the other bolts that hold the bracket on?

pics below:




I had added some copper grease to the bolt:
  
Post #234066828th Jun 2023 4:44 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10480

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Are you sure it wasn't 35Nm the manual stated (26 ft)

You don't need a torque wrench, just do it up with care.

If you can't get mole grips onto the end, and undo then yes remove the alternator? and then bracket to extract.  
Post #234067728th Jun 2023 5:39 pm
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ronald.soak
 


Member Since: 29 Apr 2008
Location: London
Posts: 519

England 2005 Discovery 3 TDV6 S Manual Chawton WhiteDiscovery 3

If you lubricate a bolt or nut you invalidate the torque wrench setting. The figures quoted are for unlubricated fixings.  
Post #234070328th Jun 2023 9:13 pm
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onetwentie
 


Member Since: 25 May 2020
Location: West Yorkshire
Posts: 93

United Kingdom 2009 Discovery 4 3.0 TDV6 HSE Auto Stornoway GreyDiscovery 4

Hi Ronald thanks for that info as I didn't know that.

As for the snapped bolt not sure if it was the copper grease that did it, but when I got some grippers on the snapped part - it came loose fairly easily. So that was very lucky!  
Post #234085130th Jun 2023 11:12 am
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