Torque Talk Talk Torque

[sloopjohnrb]

Hiyas,
As you may know fitting a recon (ESM) cylinder head to Gladys, 948 cc 1962.

When fitting the new studs, I've learnt that a "double nut" technique is best.

OK, what sort of torque should I use here?

There are:

2 for the water tap
3 for the Thermo
4 for the rocker assembly
6 for the exhaust manifold.

I've got torque settings for cylinder head and manifold BOLTS on REFIT, but can't find any numbers for fitting the above studs.

Any tips re torque, most welcome.
Best wishes
John

[Alec]

Hello John,

a double nut is not the best way, merely the most practical with the absence of the correct tool.

I have never torqued studs, just screwed them in snug, i.e just nipped up.

Alec

[sloopjohnrb]

Ah right, what@s the correct tool?

As to torque, it's just on medium sorta' tight?
Best wishes

[Alec]

Hello John,

Google 'Stud Extractor' and you'll see a couple of different types. (Not the Easy Out type by the way)

Much quicker but obviously at a cost.

'Sorta' tight seems fine.

Alec

[brucek]

Funny - I have just been wondering that too having removed the studs from my 1275 Midget engine that has been sat in the corner of my garage for the last 25 years!

I found this link to a mini site which gives 42lb/ft for hi-tensile studs!

http://www.minisport.com/mini-spare-par ... Studs.html

My guess is that 40lb/ft - the same as the nut itself would be more than adequate but there may well be more experienced bods out there who can give a more definitive answer

[sloopjohnrb]

Many thanks,

I will look for stud extractor.

I think 40lb might be excessive as the rocker bolts and the manifold bolts are less than 40lb when fitting on.
The tap studs are even thinner than the Thermo ones, so they will be very low I would think.

The misery that is a broken bolt I've suffered in times past and vowed to avoid .

I think I'll go for a medium tight fit, no torque wrench, just to be sure.

Thankx for the interesting link.

Best wishes
John

[bmcecosse]

The 40/42 lbf ft torque will ONLY be for 3/8"studs! DO NOT attempt that on any thinner studs.... Just use the double nut trick - it's fine. And 'firmly nipped up' is fine too - no need for torque on these. What you should do however - is to run a tap down each threaded hole to make sure it's clear of crap - and very lightly countersink the head at each tapped hole to clear away any rags.

[sloopjohnrb]

Hi, yes, thanks, I sorta' thought that in the post (above) I made previous to this one.

Best wishes
John