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Home > Help Needed / General Tech Chat > drilling for 11 stud again please?

welshdan

2096 Posts
Member #: 1111
Post Whore

s wales

22nd Jul, 2008 at 07:01:22pm

hi, iv asked before, but cant seem to find the post via search. tomorrow i will be drilling and tapping my cylinder block for 11 stud fitment.

to confirm, is it 3/8 unc tap that i need? what size drill bit would be best? also on the water pump side, how deep can i go? think i remember 50mm?

anyone else have any tips on doing this job? many thanks

ta

Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

22nd Jul, 2008 at 07:23:37pm

yes 3/8 unc,

although usually the thermostat end is a smaller stud and thread, 5/16 UNC iirc
but i have fitted 3/8 stuff there before, just a bit trickierfitting the rocker cover.

water pump end i asume you mean 10mm??!!

when i have done them i have droped on an old 11 stud head, spotted through with a snug drill then whiped it off and piloted from there with a pilar drill.

drill size wise try an 8mm and see if you can get a tap into it, i think the ideal size is about 8.3mm

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


Home > Help Needed / General Tech Chat > drilling for 11 stud again please?
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