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Chassis captive nuts for tow bar


 
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Willyboy
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Joined: 09 Nov 2016
Posts: 24
Location: Carshalton Surrey

PostPosted: Mon Apr 01, 2019 23:27    Post subject: Chassis captive nuts for tow bar Reply with quote

Has anyone had the captive nuts for tow bar rust away in the chassis? If so how did you go about repairing this. The chassis is fine just not a lot of meat left o the nuts.


Cheers Wil
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Roger Fairclough
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Joined: 24 Oct 2007
Posts: 1603
Location: Redditch Worcestershire

PostPosted: Tue Apr 02, 2019 12:13    Post subject: Reply with quote

When you say "not a lot of meat left on the nuts", are you referring to the threads? If so have you cleaned the threads with a tap to check the state of them?

Roger
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diggerdave
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Joined: 03 Oct 2014
Posts: 316
Location: York

PostPosted: Tue Apr 02, 2019 20:40    Post subject: Reply with quote

I agree with Roger. I think it was on this forum that I learnt the value of doing exactly that, and now (time permitting)  I clean every captive nut or stud that I deal with on the car (and every nut and bolt I re-use). If the captive nut is past saving then I guess the only remedy is to drill out through the other side of the chassis leg and use a longer bolt...? (I can't quite remember how the tow bar is arranged though.)
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1997 KZJ90 (narrowbody) 3.0d, 2" suspension lift, 235/85/16 Cooper STT Pros. 203,000m
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Roger Fairclough
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Joined: 24 Oct 2007
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Location: Redditch Worcestershire

PostPosted: Thu Apr 04, 2019 9:49    Post subject: Reply with quote

You could try to "Heli-coil" it!

Roger
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Willyboy
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Joined: 09 Nov 2016
Posts: 24
Location: Carshalton Surrey

PostPosted: Thu Apr 04, 2019 12:57    Post subject: Reply with quote

There isnít much left of the nuts. Was wondering if anyone has been able to grind the rest of the nut away then just but and bolt it.
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DaveWall
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Joined: 12 Nov 2007
Posts: 874
Location: Gloucestershire

PostPosted: Wed Apr 10, 2019 5:28    Post subject: Reply with quote

I wouldn't worry too much about the external corrosion on a captive nut, if that's what you mean - they generally suffer due to having been welded, but you try pull a bolt through one still!!!!!!!!

Clean wire brush it up and if accessible/enough thread - wind another nut on top maybe? - If it's the ones I am thinking of the main strain is sheer on the bolt, not direct pull?


BUT remember if this is for towing, make sure its right or add extra strength somewhere!!
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MisterCruiser
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Joined: 07 Oct 2013
Posts: 103
Location: Ireland

PostPosted: Sat Apr 13, 2019 0:27    Post subject: Reply with quote

A couple of the threads weren't great on mine and I just tapped them and put a lock nut on the end of the bolt within the box section just in case.
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