Dangerous/Steering Knuckle thread

[Oldiebut goodie]

Don't talk cr*p there is no way that I had vapour lock - the brakes had not been applied between setting off and the bearing collapsing. The distance was 500 yards from setting off where the van had been sat for two days. The first time that the brakes were applied was when the bearing went - as is the automatic reaction when an untoward noise occurs. How the hell could vapour lock of occurred Mr. Know it all? You are quite clearly an egotistic hot head. You are not right here so shut up telling me what happened to my vehicle. You haven't a clue.
There is good advice and then there is your opinion. Which is quite frankly not very well reasoned.

If you were to measure the thread that is used on that particular type of nut you will find that there is sufficient thread on the axle to more than cover it. When you peen the end of it you open up the threads from 16.6mm to 16.8mm therefore the outside threads serve no purpose. Yes I have checked. The outer area of the nut serves no mechanical purpose due to the distortion.
The area of the shaft which is scored is more than suitable for reuse - there is no oil seal running on it and so long as it is not ovalled there is plenty of metal to seat the bearing.

Calm down dear!

[Ian Hulley]

Ahem, yes well, moving on ...

I wouldn't recommend the cheap and cheerful wheel bearing sets ... do it once and do it right ... http://www.brickwerks.co.uk/shop?page=s ... gory_id=80

Ian.

[Mocki]

and stay clear of GSF bearings, they are made of cheese ask my brother!!!

brickwerks !- he only sells what he uses, and he cant afford to be doing jobs twice for once the pay!

[docklad]

just for the record I thought these might help. As you'll see the nut is well knackered. None of the damage was caused by me, it's how I found it. As for the bearings........well you can see for yourselves, they seem fine.

[docklad]

DO I have to make a dent it the screw itself when replacing?

[tobydog]

Have a look at the first picture of the thread on the stub. The thread that is left has been rolled over - it looks like the nut has pushed its way past the male thread. I wouldn't rely on a new nut staying on.

[Oldiebut goodie]

^^^^ Why not - I have already been through that above!!!!!!! Another that cannot understand the mechanics of the nut. Look at it and see what makes contact where - the cylindrical part of the nut is deformed by the peening and does very little mechanically - in fact there is no need for the thread there but it is just easier to set up the lathe to do so and not need another drilling action. Look at the depth of the nut portion - if it were needed it would continue to the outside edge. The nut requires only enough thread for the nut portion. The cylindrical portion is used for the peening nothing else.

docklad
Once you have set the bearings up correctly (ensuring that they are pressed fully home in the disc/hub) - the thrust washer should be able to be moved with the pressure from a screwdriver then the nut is peened (or peined) in place. ( It is all in the Bentley ) https://club8090.co.uk/forum/viewtopic.php?f=42&t=99764 You only have one chance to get it right - once used the nut must not be re-used.

[icosahedron]

I wonder how many times that nut was peened.

[Oldiebut goodie]

Quite a few by the look of it.

[toomanytoys]

I wonder how many times that nut was peened.

Just what I was thinking....

How long have you owned the van?

At a guess..
I reckon ina prev life... that bearing has picked up and spun and been replaced at some point as the inside of the outer bearing looks clean like it hasnt picked up.. I still wouldnt want to be reusing a bearing that has been stressed by being run loose.. (VW dont make bearings by the way..)

The wear on the seat area for the outer bearing is more than enough reason to change the stub axle/upright.. the bearing is going to move around and create undo stress.. and prob fail in short notice...

[California Dreamin]

Oldie but badie....strangely I am not a mind reader, nor can I give advise with 100% accuracy as I am only armed with a few words from the postee and no physical reference infront of me to go on. Admittedly I suggested vapour lock without being armed with all the facts..it was my opinion at the time given the limited information I had before me, thats all.

Up until this thread I have always respected your opinion even when our answers, lets say, differed a little and whilst I would normally ignore 'those differences in opinion' I just can't sit back and let you dispense what is arguably dodgey information that could have serious implications for a less experienced member.

The fact remains that the outter (smaller bearing) has been spinning on the end of the stub axle and has worn it down quite badly..if you re-use this stub axle it will always have excessive play as the inner part of the bearing slops around on the stub axle.

The disagreement is in regard of the damaged thread where you say their is enough good thread to be OK.

Now he could have the stub axle built up with weld and the thread and outter bearing support re-engineered but the simplest option would be a good used replacement.

I have a feeling that there are several others wanting to comment on this but are feeling intimedated by the way I was 'flamed' but like I say...when it comes to safety I just cannot stand by and see poor advice being given.

And as if by magic someone finally sees the same thing I can see ^^^^^^^^^^^^^^^^^^^^^thank god for that! well Toomanytoys

Kindest regards to you as always.
Martin

[Oldiebut goodie]

I suggest that you look at where the thread stops on a new axle.
I cannot understand how you think that that thread is stripped that outer portion does NOT have a thread on it from new.
Maybe this will help your understanding with this (poor) diagram from the manual.



Enough said now as I can see that you really do not understand.

[California Dreamin]

Thread aside...point A is badly worn....replacement stub axle needed....enough said.
Thanks for supplying the diagram as you may now understand.
Martin

[Oldiebut goodie]

Just so that you can see where the thread contacts inside the nut - here is one I took off earlier.

[California Dreamin]

Understood ....there is a section of the stub axle where there are no threads and any replacement will also show the same. However, a replacement will hopefully have sound threads all the way to the shoulder and the area where the outter bearing sits will properly support the bearing.

So are we now agreed that docklad needs a replacement stub axle assembly?

No hard feelings mate....we are here for the same reason.
Martin