Coolant bypass without radiator nipple?

[K85 Octane]

With this new radiator I put in, there is no bypass port in the tank. WTF Griffin, they have been letting me down since I bought it.

So, does the intake manifold coolant bypass get sent to the water pump now? Where does it need to go?

 

[K85 Octane]

Or do I just take the hose off and plug it?

 

[sweetk30]

yes h20 pump that's how they were in the old days .

and all these newer aluminum radiators saying DIRECT FIT = my A$$ . the dam tanks don't have the correct shape to fit the clamb shell rubbers and brackets .

are we to use hope & dreams to hold them in ?

direct fit should still mean direct fit .

 

[K85 Octane]

Amen!

I had to find a new lower hose from a myster vehicle to make it work. Radiator port is now 1.75" instead of 1.5". There are no Chevy truck hoses that size that I can find

Is there anything bad about running it into the pump? Is it worth it to have a nipple welded onto the tank? (After BB)

 

[dyeager535]

Do you not have a heater? Don't know your setup so apologies if there is something I don't know about it.

The intake is the high pressure side, the radiator tank/water pump are the low pressure side. No problem running it into the pump.

 

[K85 Octane]

Broken heater for a while now. Just had it ran into the radiator tank. New radiator doesn't have a port, which is really really weird to me. Ugg the hurdles I've had to jump through just in the last few days over something so damn simple. lol

 

[K85 Octane]

Also, when I wonder if returning the water to the radiator is better, I'm thinking about that hot water going back to the radiator and at the very least mixing with cooler water before re-entering the engine. I'd rather have it that way but there's no time to get a bung welded in.

 

[streetrodchev]

You have two easy options.

1. Plug the intake port and be done (no heater).

2. Hose on the intake and the other to the top of the water pump. (You can see the plug in the water pump in your picture.)

 

[dyeager535]

Not any different going into the pump or the tank in the radiator, both are after the cooling takes place, both would be mixing with coolant that has already been through the radiator core.

I have no idea if the heater hoses were serving dual duty as a bypass for the thermostat (same as BBC or Vortec SBC's), but if so, I'm guessing it's not real critical.

 

[6872xtc]

I can tell you that on my '72 K5, I just put a valve on that port to shut off the flow to the heater, and I forgot to drill small bleed holes in the thermostat. I have to pull it back apart as there isn't enough water movement under the thermostat to give a decent response to engine temp. So I would recommend to plug that port and drill 2 holes in the outer flange of the thermostat. Use a bit no larger than 1/8 of an inch, or it will take a long time to get to full temperature. If you have one, maybe try 1/16 " or one larger.
Or , yes run it back to the water pump. ...