1G block drain?

[Gleno28]

Hey,

Looking at doing a full flush on the 1GGZE, I remember on the 18RG it had a block drain which was great for a full block flush. Anyone have a successfull flush technique for a 1G besides heater open, thermostat out, hose in...?

Thanks

[Gleno28]

No ideas?

Might just flush from heater outlets at back of the head.

Glen.