Seriously tight 12 point main driveshaft bolts

[grafton]

anyone else had similar experiences with seriously seriously tight 12 point front driveshaft bolts?

over the course of a couple of days now, using a 12 point deep impact socket, and wd40, then wd40 'specialist release penetrant' spray overnight, then american 'pb blaster' spay overnight

ive tried normal 24" breaker bar, then that with a 5 foot scaffold pipe, neither worked

are they normal anti clockwise to undo on both sides?

what's next? heat the bolt up itself with a MAPP cannister on a gas plumbers torch? get it hot or cherry red then crack it loose or wait until its cooled then try and crack it loose?

obv i dont have access to oxy acetylene etc

then what drill them out? nightmare? cut the driveshafts? ouch!

 

[t121anf]

Impact wrench?

 

[Rusty2k]

Try harder. I got mine off with a 1 metre breaker bar and I'm pretty weedy

I wouldn't use heat. You'll just damage things.

A proper garage or industrial air driven impact wrench is a good shout if they're really stubborn. If you can't undo it by hand with a 1.5m lever then I doubt an electric or low power air wrench would produce enough torque to shift it though.

 

[grafton]

okay thanks guys

is it definitely anti clockwise as normal to undo?

ive tried my makita cordless impact wrench, the new 2017 dw1002 rated upto 1000nm

 

[grafton]

just undone the passenger side by hand with a 5ft bar, one hell of a almighty crack and bang then it came loose

im guessing its because these bolts that are fitted now have the small splines/ridges on the back of the face and should only be done to 70nm then 90 degree final turn

where as the bolts that are flat/smooth on the back of the head face, should be done to 200nm then 180 degress final turn

 

[t121anf]

Is that the official difference / torque specs? When I read up about them it seems no-one really knew.

 

[grafton]

hi yes

i got the info from a video tutorial on how to fit new front suspension dampers and strut tops etc on an audi a3/vw golf/seat leon/skoda from http://kyb-europe.com/

9.43 mins video showing how to do, but more importantly to me also shows torque specs and other useful little bits of info

 

[adon30]

I saw that video as well when looking how to do the front suspension. Kind of put me off the job....so much so that I haven't even got around to buying the 12 point socket yet