Ujs

[John L]

I have just had a kit back from the USA with a friend and on it says use a 21/64" drill this I think does go then to metric of 8.334

Hope that helps

Regards John

[Ben Davies]

Guy,

When I did mine last summer I used 5/16 UNC helicoils and studs that were UNC at one end (into the arm) and UNF the other (to take a standard nyloc). Loukas at the TR shop found these for me but Moss and others also supply them.

 

I actually didn't drill out the holes in the trailing arm at all before cutting the new threads (I think I read to do it that way in a previous post on the forum). The old threads had been stripped out completely and with the arm being a fairly soft alloy it was very easy to cut the 5/16 thread straight into the existing hole.

 

Use a light oil and go slowly - I was nervous about ruining the arms but it wasn't a difficult job in the end.

 

Ben

[Mike G]

Guy

I think you will find, the 1.5 refers to the length of the heli coil. It should be 1.5 times the dia, which should equate to 6 threads. As Ben has stated, I would not bother drilling out the stripped threads, in Aluminium, only in steel. The lubricant I have always used, for tapping out Aluminium, is diesel or paraffin; again I wouldn’t bother, but if you must, then use something like WD 40.

 

Mike G

[Jersey Royal]

Thanks Ben ,Mike,John and Stuart,

 

For your advice

 

 

Have completed the drivers side, there was only one to replace.

 

As was said, i didnt use a drill bit, just the tap insert, with a little lubricant, and by hand, cleaned out the swarf and remebered to knock off the tang.

 

Now to the other two on other side

 

Cheers

 

Guy