Why always one small nut?

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bobfish45
B7
Posts: 1182
Joined: Fri May 21, 2010 11:35 am
Passat model: b5

Why always one small nut?

Post by bobfish45 » Tue Nov 20, 2018 7:37 pm

I had an hour and a half of free ramp time at my friends garage today, so I thought I would finish doing my shocks upgrade and put the front bilsteins on, the rears I had already done.
So, plenum cover off, two 13mm nuts undone on top, down below, 18mm bolt through shocker out, bit of leverage to clear bottom arm and out. Into the vice, spring compressors on, top nut undone, swap spring to new shock, reverse procedure and back on car, 25 mins, brilliant, next, nearside.
One 13mm undone, onto next, bzzzzzzzz, bzzzzzz, bzzzzzzzz, not coming off? The bloody captive nut was spinning, WHY OH F*****G WHY?????? How often does this happen when you're flying and tied to time?
Any way, I had to get underneath with a big pry bar and force it through, complete the swap and put a nut and bolt through, AND, hold everyone up for half an hour. The crime of it going well I guess. ~x(

maclee
B6
Posts: 982
Joined: Thu Jun 09, 2011 1:13 am
Passat model: B3

Re: Why always one small nut?

Post by maclee » Wed Nov 21, 2018 11:08 am

About a week ago I had new shock absorbers fitted at the front of my SEAT, by my tame mechanic who is about a half mile down the road.

When arranging the work he asked me to soak, from underneath, the ends of the small bolts at the top of the strut, with penetrating oil for about a week, as they so often seize and shear the captive nut, (as you have described). It seems this is a very common problem on certain models.

In the event my car did not have these nuts and instead just has a big rubber top mount that is an interference fit in the top of the turret, so the penetrating oil was not needed, but this is, I am told, is not the usual design.

Sorry you had such trouble, but it might be a bit of comfort to know that this seems to be quite commonplace.

bobfish45
B7
Posts: 1182
Joined: Fri May 21, 2010 11:35 am
Passat model: b5

Re: Why always one small nut?

Post by bobfish45 » Wed Nov 21, 2018 7:03 pm

That's interesting about your fitment, another little bit of gen to store away.Might be worth having a couple of new top cups for anyone doing the same job. They're ally and the captive bolt is only splined in so chances are in these older cars it may well be common. :esm

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