67Firebird455

iTrader: (27)

Are you guys using pipe plugs or something on these things? I'm doing a conversion into a 67 bird and don't have a heater core, and don't want one, I need these things sealed up. Would rather not weld them shut in case I use the pump as a core for a new one. Advice? Thanks fellas.

Tony

massls1guy

iTrader: (9)

Don't block them, it will cause problems. You need to put a short hose on there to connect them, basically a heater bypass.

67Firebird455

iTrader: (27)

So just straight hose nipple to nipple eh? Hmmmm...

nemss1

How does it cause probs and what probs does it cause to block em?

H8TO WRK

ya it is common to block them what issues are caused?

massls1guy

iTrader: (9)

There was a thread where blocking off the heater in/out on the pump caused engine temp problems. I searched but can't find it.

Here's one other thread on the subject:
https://ls1tech.com/forums/generatio...ter-hoses.html

nemss1

Never had probs with mine. My temp isnt affected when tested on tuning software

eseibel67

iTrader: (10)

Isn't a little "U" shaped bypass hose the easiest solution instead of blocking anyway?

Mongrell

Any more input?

What about drilling a couple of small holes in the t-stat to allow a small amount of bypass flow?

Z28/2002

iTrader: (27)

^^^^ This is how I have mine

S10xGN

iTrader: (11)

FWIW, if you want plugs, they tap out to 3/8" & 1/2" NPT. I have the hoses run to my Vintage Air Gen III, but the "heat" valve remains closed (in effect, plugged) 90% of the year and I've had no problems...