Originally Posted by 69911e (Post 1161950)

This is for those people who do things themselves simply for the knowledge and pleasure of it (or those who are very cheap). Those who would rather have someone else do machine work need not read any further.



Any case which needs a oil by pass mod (7R or earlier I believe) is very cheap unless it already has updates, so find one without any updates just in case something goes wrong.



Doing the oil bypass mod is easy. There is plenty of extra metal all around where the hole goes, unless you miss by more than 6 mm (on a 12mm hole) there will be no problems. The 12mm hole goes about 28deg off vertical. The only way to hurt the case is for the sealing lip for the oil pump passage to be damaged.



Just grab any variable speed hand drill with a small end mill to start the hole. Calculate where the start of the hole must be. Drill in slightly with the end mill. Then drill all the way with a standard drill. Check to make sure the hole is where it belongs, if it isn't adjust with an endmill (I did not have to make any adjustments). Go up 1 drill size at a time until 12mm or there abouts is achieved.

Total time for drilling , 10 min.



Then the side hole must be tapped for the plug. The hole is already the right size for the tap, no drilling is needed. A slight modification to a standard tap and 10mm wrench is needed. Then carefully start tap, use plenty of oil and remave tap to clean shavings a few times in the tapping process.

10 min to modify tap and wrench.

10 min to tap hole.



Total cost $5 tap, $1.5 plug.

Total time 30 min



PS: Anyone who want to use my modified tap and wrench, just email me.