I've fitted this manifold, and trying to figure out the coolant hose routing. From what I've read the hole I plugged is important. Not sure where I'd connect it to, or if the way I have the propane warmer hooked up negates the need for it?
this is in a off-road/race truck on propane.
Thanks for any advice

 

My car started to smoke while driving to work today. Ive narrowed the location of the leak to a pipe (hose?) under the left side of the intake manifold, but cant see the pipe(hose) itself. when i press on the bigger radiator hose near the coolant reservoir, i can see coolant dribbling onto the engine from under the manifold. Anyone had a similar problem?