911 Smog pump injector hole thread size?

[jmartin1671]

Does anyone know the actual thread size for the hole in the cylinder head for the smog pump lines? I broke one off removing and need to repair. If I can't go back to original any suggestions? Thanks

[john walker's workshop]

10x1.0. pelican sells a 914 rear caliper plug with a shoulder that fits great. i use 1/8 hex head brass pipe plugs. basically the same thread count, but on a taper so it binds 2/3 of the way in and stays put. and easy to find.

[jmartin1671]

I thought about tapping for a 1/8" plug but wanted to here what someone else has done. Thank you!

[john walker's workshop]

no need to tap for the 1/8" pipe plug. just run it in until it's tight. allen head or square head are harder to get tight. find some hex head plugs.

[jmartin1671]

Ok, Thanks!