How to tighten cylinder studs

[mossman77]

What is the best way to install and tighten the cylinder head studs (number 14 in parts fiche)?  I believe the threads are 9mm x 1.25.  I was thinking of using two nuts back to back and tightening them that way, but I can't find this size nut anywhere.  I was able to use 10mm x 1.25 nuts to tighten them most of the way, but I have a tad bit more to go and the 10mm nuts won't hold when applying more force.

 

Edited August 24, 2016 by mossman77

[96motorhead]

You put 2 nuts on the stud back to back and tighten it.  I don't know the size/pitch off the top of my head but you can use your cylinder head bolts.

[mossman77]

You put 2 nuts on the stud back to back and tighten it.  I don't know the size/pitch off the top of my head but you can use your cylinder head bolts.

Right, I tried that, but the nuts don't hold as the studs get tighter because I'm using 10mm x 1.25 when the studs are 9mm x 1.25.  I thought of using the cylinder head bolts but was a little reluctant to do so because I didn't want to strip them.

Edited August 24, 2016 by mossman77

[418Stroker]

I put mine in hand tight, they will tighten more as the nuts are torqued to spec. No need to put them in tight.

[mossman77]

I put mine in hand tight, they will tighten more as the nuts are torqued to spec. No need to put them in tight.

 

I suppose that will work.  The manual specifies a certain exposed length for the studs, so I'd like to get them close to that number prior to putting the head back on.

Edited August 25, 2016 by mossman77

[nesc103y]

thread them in by hand with some blue or red loctite on them till they bottom out and leave it at that.

[mossman77]

The manual says 5 inches +/- 0.04".  That's pretty specific, so it must be somewhat critical.  Pretty sure I measured 4-3/4".  Not sure how that's possible,unless they ca be driven 1/4" or more too deep.

 

Edited August 26, 2016 by mossman77

[418Stroker]

The only issue you could have is if the nuts bottomed out on the studs when torquing them down, the factory nuts are not open, they are closed on one side. If unsure screw nut down without washer to see if it works, than reinstall washers.

[mossman77]

My fault, I was measuring with a metal ruler so my measurement was off by over an inch. My studs are just about at 5".

[susco64]

What is the best way to install and tighten the cylinder head studs

Best way is with the correct tool. Stud remover/install tool can be obtained at most auto parts stores.