Replacing Cylinder Studs

[gaillarry]

My top end is out for a rebuild (86 FLHTC) and one of the recommendations from this forum was to replace the cyl studs.  The new studs came in today. They have the shoulder on them, so they are the newer type.

Whats the best way to remove the old ones and install the new ones???

[hdjax2]

Put 2 nuts on and tighten them against each other then wrench them out using the bottom one. If your just gonna pitch them you could just use vise grips on them also. Install the new ones with the double nut method and torque to spec's. Dont forget the loctite also.

[gaillarry]

Thanks for the info, but I just read the manual and it says to use an impact gun!

[Panzer]

What are you going to put the impact gun on?
Do it like HDjax said it works.
Don't use vise grips to install them.

[FSG]

Thanks for the info, but I just read the manual and it says to use an impact gun!

Whose manual, HD ?  Give me page number and verse please.

[gaillarry]

Thanks for the info, but I just read the manual and it says to use an impact gun!

Whose manual, HD ?  Give me page number and verse please.

HD Manual, 84-90 FLT/FXR models, page 3-38 and page 3-39

[tinkerman]

I asked for some info on cyl studs here a week or so ago and I got basically the same info.

Use impact gun with a cap nut and ball bearing underneath to protect top threads on stud. The impact gun advantage is that you won't bend the studs off to the side as if you were pulling on a wrench. (careful not to lose that ball bearing down in the cases)I can see this but the idea of hammering in the studs with my impact gun just doesn't do it for me.

When I get my studs I was gonna double nut them and turn them in with a wrench or socket and do the 90 degrees after seated or the torque value. Problebly the torque value as I can't see how you can go wrong with a torque value. As for pulling the studs off to one side when tightening I just plan to keep that in mind and not do it. 

One thing I have found about this site is that there is a wealth of info here. Bewteen the shop manual and the opinions you may get on any topic the onus is still on the guy doing the work to pick the method that works best for him. (or her)

Good luck with the rebuild.

Tinkerman

[FSG]

Thanks, it's always nice to see that sort of thing in print, at least the manual has a cavet "install the studs to the depth of the painted line .....".

BUT it's no longer valid as your using new style cylinder studs which should have come with instructions, else use

M-1043, New Cylinder Base Gaskets and Cylinder Studs

found in the HarleyTechTalk > Documents & FAQ's > Instruction Sheets that have been found > HD > Service Bulletins  Section.

[gaillarry]

Fatboy_SirGarield:  Thanks for the updated info.  I have the new type studs but no instructions from the dealer.
With only 10lbs torque I can't see why the doublenut method can't be used, if care is taken not to twist the stud.  I dislike the idea of using an impact gun. I think its overkill for such a low torque setting.

[JBarrettB]

Use the double nut method to remove the old studs. Use the cap screw and bearing(Sportster ball from the ball and ramp clutch release assembly) to install the new ones. Use an air ratchet to run the studs in only. This way you do not stress the studs and install them straight. Once the stud is very close to bottomed on the shoulder, use a torque wrench to set the proper tension on them. I prefer an inch pound wrench for such a low torque setting. Lastly remove the cap screw and ball. The ball will allow the cap screw to break free of the stud without effecting the set torque. The new studs have locktite patches and do not require any additional application.
This is how to do the job correctly.

JB 

[JBarrettB]

Final thought, the shoulder goes down toward the case on the -85c stud. Just to avoid any confusion.

JB

[Panzer]

According to his manual pics, the shoulder goes up.......I'll stick with the manual.

[JBarrettB]

Thanks, it's always nice to see that sort of thing in print, at least the manual has a cavet "install the studs to the depth of the painted line .....".

BUT it's no longer valid as your using new style cylinder studs which should have come with instructions, else use

M-1043, New Cylinder Base Gaskets and Cylinder Studs

found in the HarleyTechTalk > Documents & FAQ's > Instruction Sheets that have been found > HD > Service Bulletins  Section.

Don't make a serious mistake.

JB

[FSG]

According to his manual pics, the shoulder goes up.......I'll stick with the manual.

Panzer his manual shows the old studs and he's going to install the newer style studs, have a read of the M-1043.

[gaillarry]

I'll use the new method, shoulder down and measure just to make sure.