On the road again...

[chunky79]

Mav, if you're going to use heat you really won't need much, just take it steady.

[mavada]

Mav, if you're going to use heat you really won't need much, just take it steady.

Good point, i already thought how long to heaten the alu...
The point is knowing when to stop adding heat when the bolt still wont move...

[steve2003rs6]

With the heat you are trying to slightly expand the ally. Without heat transferring to the bolt.
So be quickish don’t leave the heat on the ally too long or the heat will transfer through to the bolt. Just a gentle heat your not attempting to make them glow.

Before using the heat tap in a couple of wedges into the two slots to open them up a little bit. Or use a couple of large flat bladed screwdrivers.
Don’t overdo it or you could snap the ends off.
This will keep the bolt holes in line while you try to hammer the bolt out. And stop the bolt getting pinched during hammering.

If that fails I would cut the bolt in half and remove each half in turn.
Threaded half with nut first. When that is out use a large pin punch to remove the second half.

If that fails I would get hold of one of the drawing out tools as per the video you posted.

Ps wd40 isn’t helping. You need penetrating oil.

[mavada]

Thanks again Steve for the advice

[IchBautAuto]

With the heat you are trying to slightly expand the ally. Without heat transferring to the bolt.
So be quickish don’t leave the heat on the ally too long or the heat will transfer through to the bolt. Just a gentle heat your not attempting to make them glow.

Before using the heat tap in a couple of wedges into the two slots to open them up a little bit. Or use a couple of large flat bladed screwdrivers.
Don’t overdo it or you could snap the ends off.
This will keep the bolt holes in line while you try to hammer the bolt out. And stop the bolt getting pinched during hammering.

If that fails I would cut the bolt in half and remove each half in turn.
Threaded half with nut first. When that is out use a large pin punch to remove the second half.

...
Ps wd40 isn’t helping. You need penetrating oil.

I'd agree as an aim but remember the co-efficient of expansion is greater for Aluminium than HT steel (very approx twice) so while it would be ideal to only heat the alu alloy, if heated as an assembly the alu will expand more at any point in the process. That said, this is not an isolated assembly, it has "rubber" suspension bushes, ball joints etc all soaking up the increased temperature. Unless you are replacing everything, heat is not what I would call the prefered option.

High tensile steel bolts are not at any significant risk of bimetallic corrosion with Aluminium uprights, especially compared with stainless. Nevertheless, your road conditions are pure hell for the pinch bolt assembly. A new bolt and nut, liberal antisieze and an annual loosen and retighten is the best recepie.

I use an aircraft antisieze I have had for 40-50 years and at any time I can just remove the nut and push the bolt out with fingers. That said, I have seen issues with the pinch bolt ssembly from the factory out here without any of the UK road conditions so the anti sieze is definitely the magic potion.

Penetrating oil is the go to try and break down the corrosion deposits but it isn't always compatible with a severe heating afterwards.

[mavada]

Got it moving now with heat.
I can defenately feel the bolt is bend due to the résistance.
So i think thats why its almost impossible to get it out.
But at the moment it wont come out any further, i can just get it to turn, although very very heavy.
Due to the cooling down of the aluminium its getting almost impossible to get the bolt turning again.
So i have to apply heat again and see if i can hammer at the left, and turn at the right simultanious...but the bolt is turning so heavy i have to see if i can turn it with one hand...
Or ask the missus to join the wheelarch...

[steve2003rs6]

Tony. Yes mate rate of expansion.
IIRC To when I was an apprentice. Approx 50 years ago.
M S 0.000045 per o C
S S 0.000033 per o C etc.
The point was you don’t need a lot of heat to expand the ally. And try to keep the heat transfer to a minimum.

Mav. Did you insert a couple of wedges ?

[mavada]

I think i have to cut the bolt in the first split.
When i turn the bolt, i see the end of it going up and down axial...
Im not sure it will come out because of that.
Ill try a crowbar to get behind the top of the bolt and see if i can wedge it out while turning before cutting it...

Wander what force it needs to get bended

[steve2003rs6]

I would just cut it Mav.
Bent bolt is not helping
Get one half out then hammer out the other half using a large punch.
Still using heat and wedges.

[IchBautAuto]

Tony. Yes mate rate of expansion.
IIRC To when I was an apprentice. Approx 50 years ago.
M S 0.000045 per o C
S S 0.000033 per o C etc.
The point was you don’t need a lot of heat to expand the ally. And try to keep the heat transfer to a minimum.

Mav. Did you insert a couple of wedges ?

Steve, that was not for old dogs, just those brothers who got waylaid in life and didn't follow the true path to enlightenment. Once the recalcitrant bolt is removed the future is all in the preparation. Do it right and you'll never have this issue again.

[mavada]

This motherf..ker has left the building...
Next dismantle the DRC...
And take care of some rust on the brakeline...
And which koni settings to use...

[Shoppinit]

It’s almost worth the hassle for the sense of triumph and relief, isn’t it?

[chunky79]

Good work Mav.

[mavada]

It’s almost worth the hassle for the sense of triumph and relief, isn’t it?

Almost

Thanks guys, the moment you got that bold turning by hand....and thinking the last couple of days the doom scenarios of drilling it out...
Got the right toparm loose, the left is playing with my patience...ill fight that tomorrow.
DRC very little amount of oil came out.

@Chunky:
What happend with the 6, i seem to have missed that, sorry.

[steve2003rs6]

Triumph. Well done Mav.
You have a lot more patience than me.