Does anyone know the tq spec for the gold water tube treaded into the head on a b18c1? And i'm assuming this tube just seals with hondabond and no washer or o ring. The machine shop that did my head work removed it and i'm not sure about this.

This is the tube circled in red on a D15 engine. This is not my pic i'm just using it for reference.

 

Some Teflon thread and "good n tight" aka 15ft-lbs or so same as with any other threaded head/block items. your biggest concern is a leak it doesn't need to be crazy tight seeing as it's hollow no like it's holding water back.

 

That teflon **** aint what you want to use the head gets much to hot for teflon tape, just use some honda bond its what the factory uses.

 

Teflon tape has an operating temperature range of -212f to +515F, is rated for water, acid, gasoline, kerosene, alcohol, steam, oil and many other things it would unlikely encounter in an engine bay.
It is one of a few things sealed without Hondabond on our engines.