Barrel and cylinder head studs

78jotadave

78jotadave

Hero member
Location
Palm Desert, California. (near Palm Springs)
Specifically, when reinstalling the cylinder studs (9mm x 259mm) #31 128 963 into the crankcases, do they need to be torqued, or should threadlocker be applied?
I removed a couple of the studs to facilitate in-frame cylinder head removal for a head gasket replacement; the old gasket was an asbestos, copper-treated factory original, so I am led to believe that's the case on a 78 1200.
 
Screw them in, longer threaded end into the case, no specific torque, just hand tight. No threadlocker required.

If the barrel is still off, dress the base gasket face of the case with an oil stone, threads have often already deformed the surface. No real need to pre-stress the case threads.

Do not attempt to re-cut either stud nor case threads!

piet
 
Last edited:
chrisk said:
A couple of back to back nuts, and reaf on the bottom nut. I put a ring spanner in situ, then fitted the nuts and used the ringie to reaf on the bottom nut.
Click to expand...
Just use a sturdy dome nut at the top with a 1/4" bearing ball inside. A tiny blob of grease holds it in place. A quick jerk backwards loosens it easily once the stud is tight.

You will then realise how all those dimples in the ends of the M8 studs came to be... ;)

piet
 
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