LS3 corvette water pump, where to tap for vent/steam port?

[oakhill510]

Hey peoples,

Wheres a good spot to tap the the ls3 Corvette water pump for the vent/steam line?

Also, how come the coolant wont go up into the new tapped vent port and into the steam lines?.

Thanks in advance for the reply.

[oakhill510]

After watching this link ( https://www.holley.com/blog/post/why_do_ls_engines_have_steam_tubes_/ ) everything makes sense now. I had asked this question because on my water pump, I had tapped behind the outlet port ( see 2:22 of the video link ) of the water pump instead of from the top of the water pump like everybody else.

My confusion was I thought the top port was the coolant inlet, therefore water would push into the steam vent port where I tapped. But, its the outlet so it's pulling coolant away from my tapped port instead of pushing coolant into the steam port. Another knowledge gained from this build.

[andrewb70]

I have pictures in my GTO and Cougar build thread.

Andrew