Morris Minor Owners Club

Spent a happy 4 hours re-assembing my plan b 1275 a+ engine ( complete with awfull red paint!)

Set my trusty snap on torque rence to 50ftlbs as per by book and tightened till it clicked. Seemed awfully tight to me to i borrowed another torque rence from the garage and appears the they are tightened to about 70ftlbs

Any one think this will be a problem

If it hasn't stripped now then I wouldn't expect it to 'let go'
as you run it in. If you have managed to fit a copper head gasket
the nuts would need re torquing after a couple of hundred miles
so you could use a more accurate wrench then?? If you are
really worried why not fit a new head stud/nut.

cheers willie

moral of the story never lends ones torque rench to friends that forget to unwind it

Friend at garage has identical one..

was not worried about the bolts pulling more causeing head gasket problems.

Managed to find the same vile shade of red at halfords so head and block now match

So Ian is your new engine going to be Mini Red or Fire Engine Red, you could always do your brake drums to match

oh dear....

thing the colour is known as halfrauds awfull red!

halfrauds awfull red!

Now that I can believe

When you torque a bolt you are stressing the bolt ie stretching it. If you stretch it too much it will yield. The risk with over tightening is there is less stretch left for normal operating conditions ie expansion due to heat .

However using a torque wrench is very imprecise. Many factors can effect the actual preload or stretch of the bolt. The main one is friction on the threads and under the head. High spec engine fasteners such as ARP specify a special lube to try to get consistent torque readings.

Friction is another reason why when torquing you double click the wrench. Torque up, the wrench clicks, release then re click.

John

Friction is another reason why when torquing you double click the wrench. Torque up, the wrench clicks, release then re click.

Thanks for that John, I often wondered why that was the correct method.

I didn't know you SHOULD double click, although i always do as It seems automatic to make sure, if that makes sense. Perhaps I'll do 3 clicks now!