I drilled and tapped mine last week for 9/16-18 countersunk threaded plugs.

parts book is at work, i can let you know monday.
some one on here must have a number.
l series ones are similar (i think).

Disco-bob,
Thanks for your input .

Do you have a part no. for these bungs?

I have access to a lathe so I might just turn up some new ones in brass.

Don't worry about the beer , there is a carton already organised!

drill a holes in bungs. screw then slide hammer out. clean block properly.
get new bungs from nissan(they only sell them in lots of 5). hammer in new bungs.
have a beer. look at how mighty the a series motor is. have another beer.

I would think they need to be cleaned properly but not sure on the drilling of the plugs.

Would assume that you could just drill and tap to refit threaded plugs?

bttt.

Anybody have a view on this?

I am in the process of building up a fresh 1200 . I am curious to know if the oil gallery in the block can be adequately cleaned without removing the two gallery plugs?

If not, it appears they need to be drilled out. Anyone done this before?