10 replies to this topic

[SW78]

Hi there, I'm half way through my first build so excuse the "stupid question" factor...
I'm putting the studs for the head back into the engine block - everything's nice and clean and dry, but what's the torque setting?
I see mini spares have it listed as 42 ft lb, but I'm getting to about 30 ft lb and getting seriously worried that I'm about to strip a thread.
It's the course end going into the block on a 1275 A+ (mini mpi)
Any advice welcome!!

Cheers
Steve

[Northernpower]

You don't torque the studs into the block. The torque setting is for the nuts when you've fitted the cylinder head.

[SW78]

Ok, so tight enough is good enough, then they'll work themselves out when I tighten the head down?

Makes sense, thanks for the speedy reply!

Steve

[Spider]

Normally the studs are screwed in to the deck hand tight only.

Personally, I nip them just a tad so that when undoing the nuts at a latter time, the stud stays put. I doubt I'd be putting as much as 12 in / lb on them.

[SW78]

Whoops... they're sat there at 30 ft lb now. I'll leave them like that. Thanks!

[nicklouse]

i would pull then and check for any issues as you may have lifted some threads by forcing them in unlikely but.... and then is all is good just refit hand tight.

[SW78]

Cool, have done, all hand tight now and threads looked ok. Thanks for the advice. It was all a bit pinhole manhole in the garage just now!

[tiger99]

You should have left them alone. They spread the load slightly better when done up tight. It is only a small effect, but hand tight is not best. You were in no danger of stripping them.

[Rorf]

Amazing that highly experienced forum members have opposite views on this subject. A certain very famous UK mini engine builder says to install studs finger tight.

[minimans]

All studs should be fitted by hand wherever they are fitted, the exception is where the studs have a non threaded smaller end at the base and they are torqued in, but the torque is applied to the non threaded part at the base of the stud hole.

 stud.jpg   5.1K   1 downloads

Edited by minimans, 13 August 2017 - 09:23 AM.

[ACDodd]

Hand tight only, you can use Loctite to retain them to help keep inplace of you remove the head often.

Ac