HOW TO UNDO A VERY VERY TIGHT LOWER REAR SHOCK BOLT

[xbally]

Ok-on my newly acquired XBR there is a pair of very rusty Hagon shocks which work ok but look horrible!I have a better looking pair which came with my other recently acquired XBR project from Moto 36 which i wish to fit for the moment but...the bottom mounts are so rusty i'm afraid the bolts will shear if i apply too much pressure.I am dousing them with WD40 / penetrating fluid and know that heat can help but is there anything else i can do the remove these without creating a load of grief please?

[SteveC#222]

You're doing the right thing. Lots of WD40 or similar for the next couple of days to let it really soak in and then an appointment with Mr Blowtorch! Make sure you have a good fitting socket too.

[CrazyFrog]

An air or electric impact wrench would help too as they don't concentrate huge amounts of torque for long periods of time. I have to say my Clarke electric impact wrench is prolly the best tool I've ever bought!

[iansoady]

Stop using WD40 and try Plus-Gas which is much better penetrating oil. Leave 24 hours. It's often best to try tightening slightly then slackening.

Can you get a blowtorch on it without damaging anything?

If it's just a nut & bolt I'd just let it snap off as you'll need a new one anyway.

[JOOLZ]

Freeze spray on the bolt can help, sold in Maplins as its usually used for electronics repairs drops the temperature to -50c

[Propellor]

I swear by plus gas. Better if left a while and possibly apply heat.

Apart from that.... it's butchery!

[xbally]

Thanks..........i'll get the penetrating fluid on for the next few days and take it from there.......I think there's access for the blow torch.Time is the one thing i've got plenty of!I don't have access to an air tool unfortunately.......

[manxie]

I use a little gas pencil torch, some of us plumbers use it for lead burning, it has a more concentrated area of heat and give it a decent tap with a hammer too!! Works for me but if you break yours it`s not my fault 

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[500 T C]

                Try heat first,some Wally might have loctited the bolts.Heat will destroy the Loctite, Plus Gas will help,if you soak the threads.

[Moto63]

It was easy to spot the plumber in those few pots eh🚽 😀😀.
Yes I too usually go god the plus gas first then if that fails it's the plumbers gas 👍
Best of luck Martin

[xbally]

Firts dash of plus gas applied this morning and i shall keep at it over the next few days and try heat as well...thanks...will let you know how i get on.......

[xbally]

Update...got one undone now thanks...it didn't snap off...used penetrating fluid no heat required...had to take the silencer off for access for a 1/2 inch drive with my torque wrench for leverage.I'm now having trouble winding the bolt out!They usually just come out with a tool but this one doesn't want to.I've tried applying pressure with a socket  and i've carefully clamped a large mole grip to the bolt head and tried to wiggle it free to no avail.

[iansoady]

A picture would help......

[xbally]

Hmmmmmmmm...i'm afraid i'm not great with IT.I've never attempted to post a pic on here.Can i just take a digital pic and upload it by clicking on the attachment and other options button or do i need to put the pic on a photo hosting site as i have never used the latter.The problem i've got is simply getting enough purchase on the bottom shock mount bolt.The bolt will unscrew as far as the thread but then won't come out any further-it's just turning in the mount-whereas it will normally just wind out as you turn it with the socket.

[mthee]

It's not under any load from the shock, is it? How about getting a mate with a length of wooden dowel to tap the bolt end from the other side whilst you turn it? Or is it inaccessible for that?