What is the thread pitch on M12 and m14...

They are fine pitch: so M14 is 1.5 and M12 is 1.25
Listed at the back of the WSM with the torque specs

 

Might be useful for you. I'm working on a blog post of mine to list all replacement fasteners and torques needed when renewing the suspension... still a draft but I think its correct....

List of new fasteners (front, both sides), all Nyloc
4 x M14x1.5 class 10
12 x M12x1.25 class 10
10 x M10x1.25 class 10 (inc anti-roll bar D-brackets)
3/8x24 (track rod ends)

List of new fasteners (rear, both sides), all Nyloc
4 x M14x1.5 class 10
10 x M12x1.25 class 10
4 x M10x1.25 class 10 (anti-roll bar D-brackets)
2 x M8x1.0 class 10


(Assumes standard GTB rear anti roll bar, presumably the thicker GTS bar is M10 but I don't know)

 

https://www.belmetric.com/fine-c-3_752_754_867/

 

You might have fun removing the suspension forks... esp driver's rear at the front

 

Careful with the rear forks... NLA I think

 

When doing mine, I found there was very little a 18" breaker bar cannot loosen. And when I could not get a socket on something, having this helped:

https://www.amazon.com/Mueller-Kueps-MLK745100-Wrench-Extender/dp/B01HCZZSUM/ref=sr_1_1?ie=UTF8&qid=1484183904&sr=8-1&keywords=wrench+extender

 

An easy way to find the pitch is to take the nut off, put a thin film of engine oil from the dip stick (dirty)on the bolt or stud thread. Using a small strip of printer paper to take an impression of the thread, by pressing onto the thread length. This gives you say 8 or 10 pitches and you can measure with a ruler or vernier.

 

Or spend less than US$ 10 and buy a screw pitch gauge...

 

I have used Metrics Unlimited in Detroit, Michigan - 586) 264 0410. Excellent service and can supply almost an metric fastener and also Imperial sizes. Reasonable prices as well.
Also Motor City Fasteners - 248) 399 2830 they are in Hazel Park, Detroit, Michigan.

 

Yes thats fine if you have a set- the stuff i worked on had so many thread types this way was a handy get out of jail fix. No shops in the middle of the Atlantic.

 

Fair play!

 

They dont use metric fine on 900 mm bore Sulzer Engines

 

Do you have any pictures of the stuff you've worked on?

 

A lot of what i have is on the old camera slides
You can google Sulzer RND 90 diesel or B and W M60. or Kawasaki MAN 52/55A
Stal Laval AP32 is a steam turbine set
That will keep u busy for a while, enjoy

 

Or do it like a mechanic apprentice once learned it in his first year during the first few weeks.
Measure four pitches with the help of a vernier caliper ( measuring five crests of thread) and divide by four.

Best Regards
Martin

 

+1

ciao