Thread on z650 crankcase/head studs

[mothra]

I'm trying to get the studs out of my upper cranckcase using the trusty 'two nuts together' technique- does anyone know what the thread is as it doesn't seem to be the standard metric thread....

Stu

[Steve R]

Hi Stu,

Cant help with thread size on a z650 but on the Z1 its 10mm x 1.25.

I have just taken all the studs out of my Z1A crankcase using the trusty mole grip method with no problems. soaked them in wd 40 each night for a week then Used a large mole grip and gripped the stud near to the base to avoid bending them, all came out with no problem.

Probably would not want to reuse them as they are marked by the grips but I am putting Ape studs in any way.

[chrisu]

as steve says - its probably the finer 1.25 pitch rather than the standard and more common 1.5.

you just need the right nuts !!

[mothra]

Thanks guys - I've just ordered a bunch of 1.25 pitch nuts of the web. Something will fit.

I've tried the molegrip method, but at the moment I'm not getting a good enough grip....

[Steve R]

Stick two pairs on at 180 degrees to each other then you can twist with both hands and you are not putting a shearing force on the stud, and soak with wd or simlar.

[zedrider]

mole grips ? omg use stillsons . ive yet to find any thing that wont move with a good set of stillsons . mine dont get much use now ive got rid of the triumphs lol there you go . whats next ?

[Ed Z1-R]

"Plus Gas"
Pukka "Dismantling fluid"

[Pigford]

Chrisu..... do you mean the standard 1.0 pitch, not 1.5

[chrisu]

nope.

std 10mm pitch is 1.5

[RALPHARAMA]

Mole grips, Stilsons ? You barbarians

You were quite correct to use two nuts. You can get some stud extractors from Machine Mart for not very much, which work on a roller cam method which work very well and aren't expensive - http://www.machinemart.co.uk/shop/product/details/pro57-4-pce-stud-extractor-set

Mole grips .... stilsons ... shame on you

[mothra]

Good to see a range of opinions.... :-) The 180 degree molegrips sounds like it would help, but I'm a big wuss and I've orderd a stud remover - one of the compact jobbies that sits at the bottom of the stud. I'll try it out tomorrow and if any good post photos...

[tlc]

Can I suggest you warm the cases where the studs go in.
I find it also helps to "rock" the offending studs backward and forward once they move.
If they don`t move just keep "rocking" and warming, with a Butane torch, and heaps of penetrating oil.
Patience really is a virtue in this case.

[Taffus]

repost due to a Duh moment
[quote="tailiftchris"you warm the cases where the studs go in.[/quote]
Pun intended?:P

[mothra]

Ok, an update in case it helps anyone out.... Stud remover was one of these:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 0280439001

Long story short, it did not work. Consensus was that it probably offered more purchase than the two nut method, but was still slipping (these bolts were in tight!) Tried heat, soaking in wd40, still couldn't get them to shift. In the end, went back to mole grips and I was shown that if you orient them one way they get tighter as you turn - sounds obvious, but sometimes you need to hear these things... Got em out now, casings off being blasted...

Stu

[Pigford]

Well done Mothra....

In my opinion (tried & trusted over 30yrs) its often more down to the operator than the tool itself

I have survived on Halfords tools and if you are competent & experienced, you can usually get the job done quite satifactorily...
OK, its great having spangly brand name stuff, but you gotta have some aptitude as well...
Glad you sussed it out.... 10/10