Removed A/C box. Now what do i do to cap off my heater ports?

[Calia22]

So i removed my AC box. I'm just trying to see what other members have done for capping off their heater inlet/outlet. My engine builder put in a -10AN cap on one end, but on the water pump side, what would be the best option? i was thinking tapping and throwing a bolt in it, but i have no clue what size i should tap it with. Any inputs would be greatly appreciated!

-Casey

 

[turbo nasty]

Ive used epoxy putty with good results. Use a water wet finger go smooth off the inside/ends

 

[Calia22]

So you're saying fill the whole thing, yeah? Just block it with my finger on the bottom side and fill it up?

 

[NY Twin Turbo]

On the intake, I would just put a pipe plug in the hole. Better yet, if you have a reason for an additional coolant sensor or switch, this is a good spot. I used it for a warning light switch.

On the pump, you can fill it. But If you have someone to do it, would prefer to see it welded. I would put a rubber cap and clamp over it.

If you thread it, be careful. You may split it driving the tapered NPT pug into the hole. It doesn't take much. Just a little bit to tight and "crack".

 

[toofastforyou]

You could connect both ports together with a lenght of heater hose...

Claude.

 

[87geeinn]

Tap the water pump with a 3/8 - 18 NPT then put a plug in it from any hardware store. I used a tap and die set from Harbor Freight (p/n 91395). If you put a rubber cap and clamp on it, the turbo will bake it can it won't last a year. Had that happen once but luckily I caught it when my temps started skyrocketing.

 

[earlbrown]

The port on the intake is 1/2 NPT for the pipe plug. I like the brass ones with the hex personally.

Here's a shot showing the size of a 1/2 and a 3/8 plug...

 

[Calia22]

All excellent suggestions. Thank you everyone!

 

[turbo nasty]

So you're saying fill the whole thing, yeah? Just block it with my finger on the bottom side and fill it up?

The nipple standing up on water pump ...yeah fill it about half way or all the way. Easily drilled out in the future.