Topic: RE: CB750 Need Help Installing Heavy Duty Studs

[chewbacca5000]

I am rebuilding the top end on my K3 most of the machining is done and now comes the fun stuff putting the whole thing back together again!  I just need to know how many pounds are used to install the cylinder studs.  Also how many pounds to torque down the head.

Thanks!

[HondaMan]

When installing the studs, make sure you don't over-bottom them, as it is possible with some of them to break out the bottom of the thread casting boss. I think it's the short ones from API that can let you do this, so once you reach bottom, don't crank hard.

The API recommendation on final assembly is 20 ft-lbs: look on the back of their package, or on the insert sheet for the details.

[chewbacca5000]

Thanks Hondaman!  Much appreciated.

[markb]

As I recall the torque into the cases should be 8 ft.-lbs. maximum.

[grcamna2]

What keeps the studs from turning out next time the head cap nuts are removed? loctite ?

[chewbacca5000]

What keeps the studs from turning out next time the head cap nuts are removed? loctite ?

This is a very good question.  I am planning on just making sure the threads are clean and installing the new studs.

[MCRider]

What keeps the studs from turning out next time the head cap nuts are removed? loctite ?

I can't answer the question absolutely, but there are a lot more threads in the case, than there are threads in the nut.

I don't think I've ever heard or read that loctite of any type should be used. I just snugged mine down to 8ft lbs. I think i got that number from Big Jay at APE, or his underlings.

[grcamna2]

I've never really done the procedure myself  ..was just wondering.I would imagine that there is some resistance to the threads going into the cases that may hold them in?

[MRieck]

I use red loctite on mine and do not use much torque. If I need to remove them I use heat. I also place a cylinder and head on (after installing the studs) then lightly snug up head nuts to to improve the stud alignment. I allow it to sit for a couple of days for the loctite to fully cure.

[MCRider]

mrIECK: AS always, thanks for the insight!   

[HondaMan]

I use red loctite on mine and do not use much torque. If I need to remove them I use heat. I also place a cylinder and head on (after installing the studs) then lightly snug up head nuts to to improve the stud alignment. I allow it to sit for a couple of days for the loctite to fully cure.

great stuff!
I usually get them after the corrosion has become an adhesive that makes red Loctite look like grease....those are REAL secure!

[MRieck]

mrIECK: AS always, thanks for the insight!   

You're welcome MC and thanks for the compliment. Torquing those studs into the case distorts the threads and, IMO and Smokey's, defeats the purpose of the studs. I always set the studs to the height I want....the Loctite will hold them in place and make for a real stout assembly.

[MRieck]

I use red loctite on mine and do not use much torque. If I need to remove them I use heat. I also place a cylinder and head on (after installing the studs) then lightly snug up head nuts to to improve the stud alignment. I allow it to sit for a couple of days for the loctite to fully cure.

great stuff!
I usually get them after the corrosion has become an adhesive that makes red Loctite look like grease....those are REAL secure!

Thank you Mark. I hear you about the corrosion....awful stuff.

[HondaMan]

I use red loctite on mine and do not use much torque. If I need to remove them I use heat. I also place a cylinder and head on (after installing the studs) then lightly snug up head nuts to to improve the stud alignment. I allow it to sit for a couple of days for the loctite to fully cure.

great stuff!
I usually get them after the corrosion has become an adhesive that makes red Loctite look like grease....those are REAL secure!

Thank you Mark. I hear you about the corrosion....awful stuff.

This reminds me...I'm starting on the Performance Book. Could I beg some pics of your work, especially the enlarged valves and those Carlsbad Cavern inlet ports? Please drop me an e-mail at mgparis@concentric.net .