Vortec Heads Bypass Hose

[OldChevy1954]

Originally Posted by FirstOwner69

I'm running a Vortec 350 GM crate engine. I called a GM technical assistance number (think it was included with the engine) about something else. During that call they told me to be sure to run a hose between the intake and water pump if I had A/C.

Here's a pic of what I did.

FO69, I like what you did, but I do not have another outlet on my water pump as you do on the passenger side there.
Strangely my only water pump outlet on this factory HT383 is on top. I'm using the top pump outlet as the return from my heater box, and the feed to the heater comes from the intake manifold.
I am getting some spikes on my dash temp gauge. The temp sender is in the drivers side head. I'm thinking I'll move that to the manifold on top and see if the spiking changes.
Thanks for your input on this topic.